Aircraft Motion Research Articles

The Influence of Efficiency and Effectiveness on the Performance of Apron Movement Control in Supervising Aircraft Movement at Sultan Thaha Saifuddin Airport Jambi

The success of employees in carrying out their duties can be measured through the timeliness in servicing the aircraft that will park on the apron that will use the Aviobridge because at Sultan Thaha Saifuddin Airport Jambi the operation of the Aviobridge is carried out by Apron Movement Control (AMC) personnel. When the number of service delays decreases, the target achieved will be optimal. The case that the researchers observed was that currently the personnel in the Apron Movement Control (AMC) unit of Sultan Thaha Saifuddin Jambi Airport did not meet the number specified in the nomenclature. In accordance with the directors' regulation no PD.01.01/08/2018/0070 regarding the Airside operation formation, it is explained that the number of personnel that should be there is 11 people. Meanwhile, there are only 6 personnel in the Apron Movement Control (AMC) unit. The purpose of this study was to find out how much influence efficiency and effectiveness have on the performance of Apron Movement Control (AMC) in supervising aircraft movements on the apron of Sultan Thaha Jambi Airport. Data collection was carried out through distributing questionnaires in quantitative research with purposive sampling techniques and a sample of 40 respondents. Using SPSS 25. Based on the results of the study, it showed that the independent variables (efficiency and effectiveness) had an effect on the dependent variable (AMC performance) in supervising aircraft movements at Sultan Thaha Saifuddin Airport, Jambi. The R Square value of 0.751 means that the efficiency and effectiveness variables affect the performance of Apron Movement Control (AMC) by 75.1%.

Liberalisation and spatio- temporal patterns of air traffic flow from Nigeria to West Africa

Abstract The liberalisation of aviation policies across Africa has had a significant impact on air traffic flow within the region. This study aims to examine the effects of this policy, with a specific focus on Nigeria’s regional connectivity to other West African countries. By analyzing data from the pre and post-liberalisation eras, the study aims to determine the changes in passenger and aircraft movement and evaluate the significance of the policy on Nigeria’s sub-region. The study utilizes a longitudinal data set covering the period between 1988 and 2018. This data is divided into two eras: the pre-liberalisation era (1988-2000) and the post-liberalisation era (2001-2018). To assess the impact of liberalisation, a t-test is conducted on the data, comparing the air traffic flow patterns before and after the implementation of liberalisation policies.The findings reveal a substantial improvement in the air traffic flow of passengers and aircraft from Nigeria to other West African countries since the introduction of liberalisation policies. The growth patterns observed in the post-liberalisation era exhibit a linear trend, indicating sustained progress. However, uncertainties arising from hazards in air transport operations can influence the growth patterns.The study underscores the positive impact of African aviation liberalisation policy on air traffic flow, particularly in the regional context of Nigeria’s connectivity with other West African countries. The results demonstrate significant improvements in passenger and aircraft movement. However, to fully capitalize on the benefits of liberalisation, regional efforts and an improved framework need to be intensified. This will ensure sustained growth and maximize the advantages of liberalisation in the aviation sector.

Constraints in the Problem of Calculating Optimal Trajectories for a Supersonic Non-Maneuverable Aircraft

The influence of phase and other constraints on the method of searching for the trajectories of the movement of a civil supersonic aircraft, which are optimal in terms of fuel consumption, is considered. Based on the solutions found by the dynamic programming method, taking into account numerous restrictions on flight altitude, pitch angle, normal high-speed overload, aircraft speed, engine thrust, etc., it is shown that almost all of these conditions can be ignored during the initial stage of calculations, since the optimal solution does not reach them. Therefore, one can first apply the maximum principle, and use the dynamic programming method only in those cases where a substantial part of the constraints turns out to be significant.

Increasing the accuracy of finding the coordinates of sea mines by means of kinematic design

The issue of demining reservoirs, rivers and sea raids and ports, which is relevant for Europe during the period of active deployment of military confrontations on its territory, is considered. Only in the maritime territorial waters of Ukraine and in the water areas of its freshwater reservoirs and rivers, during the year of the war, the enemy laid up to a thousand different mines. Demining of the Ukrainian water spaces of the sea, reservoirs and rivers is an important social and economic problem, the solution of which does not tolerate delay and waiting for the full end of hostilities.
 The purpose of the work is the development of principle schemes for optimizing the spatial movements of search and mine clearance vessels and the creation of algorithms for calculating the precise coordinates of the spatial location of floating, anchor and bottom mines by means of kinematic design.
 The research methodology was the application of the theory of mapping coordinates and trajectories of spatial movements of moving objects by means of graphic geometry, taking into account the specifics and dynamic features of kinematic design.
 A schematic diagram of the spatial location of search trawlers and UAVs or auxiliary search floats when searching for mines has been developed. Mathematical dependencies have also been established for the precise calculation of the coordinates of detected mines based on the data of the applied theory and kinematic design schemes. For the search for floating mines, the optimal trajectory of search movements of unmanned aerial vehicles along the Archimedean spiral is proposed. The optimal number of aircraft that search for floating mines at the same time has been determined. As one of the most effective options for the disposal of mines, their detonation with warheads dropped from an aerial liquidator drone has been proposed.
 The main result of the study is the creation of a methodology for calculating the refined coordinates of the search for floating, anchor and bottom mines in combination with the optimization of the trajectories of the search movements of aerial and floating search vehicles along the Archimedean spiral. This ensures not only a 25-30% increase in surveyed and demined areas, but also a proportional saving of fuel due to a reduction in the number of crossings of search trawlers. It has been established that at speeds of spatial movements of search aircraft or auxiliary floating means of 5÷5.5 m/s, using the proposed search scheme, it is possible to survey up to 6 square kilometers of sea water area every hour. At the same time, it is possible to save up to a third of the cost of expensive fuel due to the reduction of movements of the trawler boat.

Peran Petugas Apron Movement Control (Amc) Dalam Pengawasan Keselamatan Sisi Udara Di Bandar Udara Tambolaka Sumba Barat Daya

ABSTRACT, Apron Movement Control (AMC) officers often find Ground Handling officers who do not use ear protection and drive GSE vehicles that exceed the maximum speed of 20 KM, causing the GSE vehicle to suddenly die. This researcher aims 1) To determine the role of Apron Movement Control (AMC) officers. 2) To find out the obstacles for Apron Movement Control (AMC) officers in an effort to improve safety on the air side and to find out solutions in solving the obstacles for Apron Movement Control (AMC) officers.
 This study uses a qualitative method. The tools used were the researchers themselves, with the results of observations in the Apron Movement Control (AMC) unit, interviews and documents as supporting documents to answer the research questions, the researchers conducted a 3-stage analysis consisting of data reduction, data presentation and drawing conclusions.
 The results of this study indicate that 1) The role of the Apron Movement Control Unit (AMC) at Tambolaka Airport, Sumba Barat Daya, is located at domestic and international airports which play a very important role in aviation security and safety including providing instructions and supervising all vehicles and personnel traveling serves to oversee the movement of aircraft in the area of ​​aircraft that are currently operating on the Apron and Runway. 2) Obstacles in the Apron Movement Control Unit (AMC) Tambolaka Airport, Southwest Sumba, namely the obstacles experienced when carrying out supervision, there is still a lack of ear protection when monitoring the performance of baggage handling personnel and Apron Movement Control (AMC) officers. naturally the Apron Movement Control (AMC) officer while carrying out surveillance on the apron, the officer found a GSE vehicle that was traveling beyond the maximum limit of 20 km so that it experienced a sudden engine shutdown, not knowing about the rules on the air side.

Development of model predictive controller in avoidance design of Unmanned Aerial Vehicle (UAV)

This research was accomplished by employing already developed mathematical model of a 6DoF UAV in free space through the motion of the 6DoF aircraft (unmanned aerial vehicle) determined by coordinate systems which allow an aircraft’s position and orientation in space to be kept tracked. The discrete method of the model developed for simulation in Simulink was realized with a suitable transfer function. Then, an artificial neural network model predictive adaptive controller that can handle the nonlinearities associated with the UAV was developed based on state space technique and the model predictive controller (MPC) utilizes a neural network model to envisage future plant (aircraft) responses to potential control signals. The developed model predictive controller network was successfully trained offline using Feed-forward Back-propagation algorithm with speed and position as inputs since the underlying objective of this work is to improve the speed and position in order to advance the safety collision distance of the UAV because these parameters are mostly considered in the avoidance maneuver performance. Also, the results reveal that the speed of the generated UAV is approximately the input speed of 75MS–1 during the time the UAV is affecting maneuvering. Significance of the result is that the proposed algorithm is capable of generating collision-free trajectory for different waypoint cases.

An Image Planar Positioning Method Base on Fusion of Dual-View Airborne SAR Data

Effective utilization of airborne synthetic-aperture (Airborne SAR) imagery often requires precise location of each image pixel. Historically, the positioning of airborne SAR imagery either relies on the use of reliable reference points to determine the relative position of the image, or requires the precise motion information of the aircraft and the characteristics of the SAR data collection system as input to determine the absolute position of the image. However, for many applications, the accuracy of traditional positioning methods is not high due to the challenge in obtaining the accurate geographic positions of reliable reference points and the inaccuracy of the recorded aircraft motion information. This study introduces an airborne SAR image planar positioning approach based on the premise that the systematic positioning error of the dual-view airborne SAR images are relatively consistent. The suggested planar positioning method applies the positioning auxiliary parameters of the initial ground-range airborne SAR image to ascertain the transformation relationship between the target’s initial geographic position and pixel position, and it then uses the equivalent equation for the position of the homologue point to assess the systematic positioning error of the SAR image and determine the geographic position of a pixel in a digital SAR image. This approach has advantages over previous techniques in that it requires no precise geographic position information of the ground reference points, and on the basis of using the RD model to accomplish coarse positioning of four corners of SAR image, it no longer needs aircraft trajectory data. Tests were conducted using two airborne SAR images actually captured, and the experimental results indicate that the proposed method can achieve high precision planar positioning of dual-view airborne SAR images. Error sources are analyzed and recommendations are given to improve image positioning accuracy in future airborne SARs.

Increasing the accuracy of finding the coordinates of sea mines by means of kinematic design

The issue of demining reservoirs, rivers and sea raids and ports, which is relevant for Europe during the period of active deployment of military confrontations on its territory, is considered. Only in the maritime territorial waters of Ukraine and in the water areas of its freshwater reservoirs and rivers, during the year of the war, the enemy laid up to a thousand different mines. Demining of the Ukrainian water spaces of the sea, reservoirs and rivers is an important social and economic problem, the solution of which does not tolerate delay and waiting for the full end of hostilities. The purpose of the work is the development of principle schemes for optimizing the spatial movements of search and mine clearance vessels and the creation of algorithms for calculating the precise coordinates of the spatial location of floating, anchor and bottom mines by means of kinematic design. The research methodology was the application of the theory of mapping coordinates and trajectories of spatial movements of moving objects by means of graphic geometry, taking into account the specifics and dynamic features of kinematic design. A schematic diagram of the spatial location of search trawlers and UAVs or auxiliary search floats when searching for mines has been developed. Mathematical dependencies have also been established for the precise calculation of the coordinates of detected mines based on the data of the applied theory and kinematic design schemes. For the search for floating mines, the optimal trajectory of search movements of unmanned aerial vehicles along the Archimedean spiral is proposed. The optimal number of aircraft that search for floating mines at the same time has been determined. As one of the most effective options for the disposal of mines, their detonation with warheads dropped from an aerial liquidator drone has been proposed. The main result of the study is the creation of a methodology for calculating the refined coordinates of the search for floating, anchor and bottom mines in combination with the optimization of the trajectories of the search movements of aerial and floating search vehicles along the Archimedean spiral. This ensures not only a 25–30 % increase in surveyed and demined areas, but also a proportional saving of fuel due to a reduction in the number of crossings of search trawlers. It has been established that at speeds of spatial movements of search aircraft or auxiliary floating means of 5÷5.5 m/s, using the proposed search scheme, it is possible to survey up to 6 square kilometers of sea water area every hour. At the same time, it is possible to save up to a third of the cost of expensive fuel due to the reduction of movements of the trawler boat.

Analytical Synthesis of an Aircraft’s Lateral Motion Control by Output at the Lack of Measurements of Slip and Roll Angles

For a linearized fourth-order model describing the lateral motion of an aircraft with two controls, the stabilizing control laws analytical expressions are obtained at the lack of measurements of slip and roll angles. Analytical synthesis is based on a new approach of solving the problem of control by output. In contrast to the traditional Van der Woude approach using multilevel decomposition, the proposed approach is applicable to a wide class of systems with total dimension of control and observation vectors not exceeding the dimension of state vector. A compact formula is presented that determines the matrix of controller by output for a fourth-order dynamic system with two inputs and two outputs, provided that the indices of controllability and observability are not equal to each other. The results of simulation of control processes are given on the example of stabilization of the lateral motion of a hypothetical aircraft.

Air-traffic controller and autopilot joint control of aircraft as mixed integer quadratic problem

One of the traditional problems in air-traffic management is optimal safe scheduling aircraft at a point of air-routes join. However, this problem implies another one, namely, the problem of guiding the aircraft to the prescribed point of its route at the necessary instant. The latter problem is studied much less attentively. Change of the arrival instant can be provided by alternating the aircraft motion trajectory on the basis of near-airport air-routes scheme or by alternating its velocity. Such a control can be worked out as automatically by the aircraft autopilot as manually by an air-traffic controller. But it can be difficult to an air-traffic controller to construct such a control especially during rush hours in loaded airports. In this paper, the authors suggest an optimizational formalization of the problem of automatic directions generation for such a guiding. The criterion to be minimized in this formalization is the number of controller-pilot interactions, because each such an interaction is a long, difficult process liable to linguistic, technical, psychological, and other errors. Since the criterion and other processes are of discrete kind, the formalization is done in the framework of mixed integer quadratic programming. The obtained problems are solved numerically by means of MIQP-solver provided by the Gurobi library. Each subproblem is solved quite fast within 0.1-0.5 seconds. So, solution of the entire problem (which includes enumeration of trajectories and choice of the optimal velocity regime for each of them) takes one-two seconds. Thus, the problem for the entire group of aircraft can be solved during a time acceptable for a real time application.

Wireless Network-Aided Delay Information System Correlation with Airport Grid Distribution Based on Multideterminants Big Data

The intelligent sensing and communication technology in the airports’ grid information system provides a multidimensional big data set for analyzing flight delays. These data from air traffic control, weather, and multiple determinants will cause initial flight delays. Due to the influence of adjacent flight time correlation, the initial delay causes the delay of subsequent flights, discovered by mining information sensing data, forming the phenomenon of flight delay diffusion. Different determinants will lead to the delay diffusion form of different regions, and more seriously, it will lead to “disaster area” delay in the whole regional grid information structure. To analyze the spatial impact of each factor on flight delay and explore the regional distribution of delay determinants, this paper combined the spatial regression model and determined the key explanatory variables by statistical and processing of the aviation system data. The case study showed the spatial airport delay characteristics in terms of aircraft movements in China. After processing intelligent sensing and communication data, the results show that there is a spatial effect between airports in terms of delay and determinants. The high-delay clusters of delay constraints principally occurred in the Beijing-Tianjin-Hebe and Yangtze River Delta urban agglomerations. Direct flights, weather, new flight routes, take-off, and landing capacity have a more critical impact on spatial airport delays. The use of Internet of Things technology to perceive, analyze, and integrate multiple information of airport delay and combine spatial analysis models can accurately mine delay characteristics and effectively achieve digital and intelligent flight delay management.

Taking into account a location of aircraft’s center of mass during motion cuing

Compared to other information sources, motion cues provide a pilot with anticipatory information about spatial position and movement of aircraft. For motion cueing a flight simulator cockpit is installed on a motion system, movement of which motion cueing. Therefore, motion system is one of the most important components of full flight simulators. The problem of effective use of constructive resources of six-degrees of freedom synergistic motion system has been solved. But the problem of improving the motion cueing remained unsolved, due to the fact that location of motion system center of rotation is significantly different from location of aircraf’s center of gravity, and motion cues differ from real, flight one. The study subject is motion cueing on flight simulators. The problem was solved on the basis of simplified operator for transformation of motion system movements along individual degrees of freedom into jack movements, cubic spline functions to describe the dependence of the centers of rotation along pitch and yaw, and optimization theory using the deformable polyhedron method. The formulated and solved problem of taking into account of location of aircraft’s center of gravity during motion cueing along pitch and yaw increases an efficiency of using of constructive resource of a six-degrees of freedom synergistic motion system, a motion cueing fidelity and training realism on flight simulator.

Information System of the Robotic Towing Airfield System

Relevance. The development of aviation technology is associated with the development of new means that directly ensure the movement of aircraft (AF) at the airfield. To carry out ground maneuvers with aircraft, towing airfield systems (UAS) are used, which can significantly reduce noise and air pollution near the airport, as well as reduce the inefficient resource consumption of aircraft engines and provide significant savings in aviation fuel. UAS is also used when the aircraft loses the ability to move and is located on or near the working area of the airfield, which creates a serious problem leading to the closure of the airport for flights, while airlines incur significant losses.Purpose of research. Improving the efficiency of the towing airfield system through the development of an information system. Objectives. Development of the structure of a robotic towing airfield system, drawing up a structural diagram of the ACS layout of the towing platform, design of block diagrams of the logical controller of the ACS platform.Methods. The level of horizontal deviation of the platform from the contrast line was chosen as the setting influence determining the position of the platform in space, which is measured by analyzing images coming from the technical vision system installed on the tow truck. Results. In the course of the study, the structure of a robotic towing airfield system was developed. Based on this structure, a block diagram of the ACS layout of the towing platform was designed and a block diagram of the logical controller of the ACS platform was developed.Conclusions. 1. The structure of a robotic towing airfield system has been developed, including a mobile tow truck, a coupling device, an aircraft, and an on-board control system. 2. An algorithm for controlling the positioning of a robotic towing airfield system based on the logical processing of signals of an optocoupler matrix has been developed. 3. Algorithms have been developed for controlling the movement of the RBAS along a given contrast line under the action of external disturbing influences of a deterministic and random type, allowing for high-precision movement of the RMB.

High Speed Flows

High speed gas flows occur during the movement of aircrafts, rockets, and descent vehicles, as well as in combustion chambers, nozzles, and many other technological applications [...]

Effect of Completeness of Land Side Facilities on Passenger Satisfaction at Tebelian Sintang Airport, West Kalimantan

Airport according to Annex 14 of ICAO (International Civil Aviation Organization) is a certain area on land or water (including buildings, installations and equipment) which is intended either in whole or in part for the arrival, departure and movement of aircraft. Tebelian Sintang Airport is categorized as a new airport so that the buildings and facilities at the airport are still inadequate so that repairs and additional facilities are needed. From the results of observations, researchers know that at Tebelian Sintang Airport, West Kalimantan, they have started to improve (1) existing facilities at the airport and add (2) complete facilities such as special places for breastfeeding, prayer rooms and additional seats for passengers and the addition of other facilities for comfort and safety. passengers while at Tebelian Sintang Airport, West Kalimantan. The research method used is a quantitative method. With a total sample used in this study of 100 respondents, and a total population of 75,000 passengers. The respondents in this study were service users who had used the facilities at Tebelian Sintang Airport, West Kalimantan. Research techniques based on the philosophy of positivism, are used to examine certain populations or samples. Sampling techniques are generally carried out randomly, data collection uses research instruments, data analysis is quantitative/statistical in nature with the aim of testing established hypotheses. This study has one independent variable Facility (X) and dependent variable Passenger satisfaction (Y). The results in this study show that the value of T count is 28.814 T table 1.98447, and a significance value (sig) of 0.000 0.05. Therefore it can be concluded that Ho is accepted, meaning that there is a positive influence of the completeness of the facilities variable on passenger satisfaction at Tebelian Sintang Airport, West Kalimantan.

Operational Analysis of the Apron Movement Control (AMC) Unit in Handling Aircraft at Abdulrachman Saleh Airport Apron Malang

Apron Movement Control (AMC) is an airport personnel who has a license and rating to carry out duties as responsible for flight operations, supervision, aircraft movement, vehicle traffic, passengers and cleanliness supervision in the airside area and records flight data on the apron. Supervision carried out by AMC aims to create flight security and safety and create discipline from service users which can affect activities on the air side. The purpose of this study was to find out how the Apron Movement Control (AMC) Unit Standard Operational Procedure is in handling aircraft on the apron and the obstacles faced by the AMC unit at Abdulrachman Saleh Airport Malang. This research is a qualitative research using primary data and secondary data. Data collection techniques used are observation, interviews and documentation. The observation is to conduct a review or direct observation in the working area of the AMC unit. The interviews in this study were AMC officers consisting of the head of the AMC unit and 2 personnel. The documentation is collecting data at the time of observation and interviews, as well as taking pictures during field activities. The results of this study can be concluded that the Standard Operational Procedure unit Apron Movement Control (AMC) in handling aircraft on the apron, namely service and supervision. Services, namely arranging aircraft movements, plotting parking stands, services for emergency aircraft using follow me vehicles. Then the supervision referred to is supervision of vehicle traffic, movement of people/passengers, loading and unloading of goods, routine inspections of FOD, supervision during refueling, and when the engine is running up. The performance of AMC officers is said to be good because they carry out their duties in accordance with the Standard Operating Procedure (SOP) from the Ministry of Transportation and UPT. Obstacles in operational activities, namely the determination of parking stands still refers to the Indonesian Air Force and radio communications that often break up between ATC and AMC, AMR's accurate data is delayed in entering ATC and GH/airline units, heavy damage to aprons and taxiways, and airlines are late in delivering flights schedule. The solution to this problem is that the AMC unit holds internal and external meetings with ATC, GH and the Indonesian Air Force, so that the three parties can determine the best solution regarding flight operations.

Analysis of the Work Discipline of the Ground Support Equipment (GSE) Unit at Adi Soemarmo International Airport

Punctuality in the world of aviation is an important point in work. Adi Soemarmo International Airport is one of the busiest airports. In serving aircraft movements, the Ground Support Equipment unit plays an important role in it, so that the unit requires to always carry out work discipline. The discipline carried out by GSE officers is very important in handling the movement of aircraft, vehicles and goods that cross the apron area. This is to minimize errors that occur when in the field. This study aims to determine the factors that influence the work discipline of the Ground Support Equipment unit. In addition, this study also aims to obtain the results of the work discipline of the Ground Support Equipment unit carried out by Apron Movement Control. This research is descriptive using qualitative methods with data collection methods in the form of observation, interviews, and documentation. The data obtained was in the form of interviews with AMC and GSE unit personnel at Adi Soemarmo International Airport as well as documents used to carry out daily activities. The results of this study indicate that the factors of work discipline at Adi Soemarmo International Airport include compensation, leadership, goals and abilities, fairness, supervision. The five factors give different influences. In terms of work results, personnel can get better results with the two units having a good relationship, supported by an office location that is not far away, making it easier to coordinate and communicate. Personnel carry out work discipline properly based on existing SOPs. Existing constraints such as the occurrence of violations can be handled by the unit according to the rules in enforcing sanctions.

DESIGN OF THE NEW RUNWAY AT SUPADIO INTERNATIONAL AIRPORT'S RIGID PAVEMENT THICKNESS USING FAA METHOD

Supadio International Airport in Pontianak is a gateway for many domestic and international tourists. In order to boost West Kalimantan's economy and tourism, PT. Angkasa Pura II (Persero) wants to expand the Supadio International Airport by adding a second runway. This article looks at how the FAA (Federal Aviation Administration) method was used to plan the thickness of the rigid pavement on the new runway at Supadio International Airport. The expected number of people and aircraft will be calculated using the double-moving average method. The anticipated time frame is 2035, with 12.763.479 passengers and 121.782 aircraft movements annually. The Airbus A330-300 requires the most considerable thickness of the concrete slab, consisting of dual tandem wheel types and a maximum take-off weight (MTOW) of 533.519 lbs. As the original soil is in poor condition, a 52.5-cm-thick embankment is required to achieve a CBR value of 6%. The rigid pavement thickness design result for the design life of 2035 is as follows: surface course = 56,39 cm, subbase course = 15,24 cm, stabilized subgrade/base soil = 52,5 cm for critical areas, and a surface course of 50,751 cm, subbase course = 13,716 cm, and stabilized subgrade/base soil = 52,5 cm for non-critical soil.

Simulation of the Joint Movement of a Robotic-Towing Vehicle and an Aircraft Using Signals from an Optocoupler Matrix

Actuality. The heavy workload of airports with transport and cargo aviation creates a problem the land logistics, that seriously complicates the work of the airfield towing system and personnel working processes. That entails expences associated with delayed deliveries or equipment downtime. The usage of the automatic aircraft movement systems, which are capable of towing aircraft round the clock and quickly along the airfield, following the optimal trajectory allows to avoid such situations.Purpose of research. Creation of the mathematical model and the control algorithm for the autonomous joint movement of a wheeled aircraft towing vehicle and an aircraft, where the control is based on the signals of an optocoupler array.Methods. Achieving this goal required solving the following problems: describing of a dynamic model of wheeled bodies interconnected by an elastic element; creation of a feedback model based on a group of optocouplers detecting a contrast line; description of the logical conditions that allow determining the position of the object relative to the contrast line. To describe the dynamics of the wheeled platform, the equations of Lagrangian dynamics, as well as the numerical methods of mathematical modeling, were used. An optocoupler array is considered as a tool for estimating the position of the system relative to the contrast line.Results. A mathematical model, which explores the system movement and reveals the interaction of the system elements has been developed. An adaptive algorithm based on the discrete type feedback for the system managing is developed. An example of the control system when moving in a straight line with the passage of turns at an angle of 90 degrees is considered. A combined braking system in which the distributed brake efforts both on a aircraft and the tower are formed is proposed.Conclusion. As a result of the mathematical modeling, it was found that the system of wheeled bodies, bound by the force of elasticity, is able to perform controlled movements along a straight line and when passing sharp turns, based on the readings of the optocoupler matrix; corresponding graphs are shown.

Penerapan Jaringan Saraf Tiruan / JST (Backpropagation) untuk Prakiraan Cuaca di Bandar Udara Radin Inten II Lampung

Weather prediction is needed in planning daily life, one of which is to make decisions. The success of a weather prediction will have an impact on decision making in various fields, including agriculture and aviation. In the field of aviation, weather prediction is important to determine the time, location, direction of motion, altitude and plan the movement of aircraft to take into account operational disturbances that can be caused if the weather is bad and also to consider in determining flight routes or determining in carrying additional fuel if in an emergency. In the case of the aircraft having to return due to unfavorable weather conditions. Therefore the need for a good weather prediction method so as to reduce losses and damage. In this case the author tries to focus on the maximum parameters in the development of weather forecasting information design based on Artificial Neural Networks / Backpropagation by adding input data of rainfall, temperature, humidity, sunlight, air pressure, wind direction and wind speed. This research was conducted in the area of Radin Inten II Airport, Lampung. The material used in this study is in the form of daily data on meteorological conditions in the Radin Inten II Lampung Airport area from the Radin Inten II Meteorological Station for the last 3 years, from 2017 to 2019. This data is needed as input data for the algorithm that will be used in study. Based on the research results, the best training accuracy is 100% on the artificial neural network architecture with levenberg-marquardt training function parameters (trainlm) and scaled conjugate gradient (trainscg), binary sigmoid and bipolar sigmoid activation functions, and the number of neurons 20, 40, 60, 80, and 100. Meanwhile, the best test accuracy is 74,359% on the artificial neural network architecture with the training function parameters gradient descent wit momentum and adaptive learning rate (trainingdx) and binary sigmoid activation function (logsig) and the number of neurons 20 and 80.