Transportation Platform Research Articles

Modelling and attitude control of novel multi-ducted-fan aerial vehicle in forward flight

Multi-ducted-fan aerial vehicle (MDFAV) is a novel platform for future transportation with promising prospects, which presents brand new challenges to the modelling and control approaches. In this paper, a comprehensive flight dynamical model of MDFAV is established utilising the aerodynamics principles and classical rigid body dynamics theory aiming to balance the complexity and covering necessary important dynamical behaviour of MDFAV, which is converted into state space by linearisation at the specific speed in forward flight mode in the following step. Subsequently a dual closed loop PID controller is put forward to keep flight fast and stable with the key coefficients tuned by non-smooth parameters optimisation method. The software and hardware of flight controller are designed for flight test of MDFAV systematically. Experiment results demonstrate excellent tracking performance and robustness, and at the same time, environment disturbances are suppressed effectively.

Modelling and attitude control of novel multi-ducted-fan aerial vehicle in forward flight

Multi-ducted-fan aerial vehicle (MDFAV) is a novel platform for future transportation with promising prospects, which presents brand new challenges to the modelling and control approaches. In this paper, a comprehensive flight dynamical model of MDFAV is established utilising the aerodynamics principles and classical rigid body dynamics theory aiming to balance the complexity and covering necessary important dynamical behaviour of MDFAV, which is converted into state space by linearisation at the specific speed in forward flight mode in the following step. Subsequently a dual closed loop PID controller is put forward to keep flight fast and stable with the key coefficients tuned by non-smooth parameters optimisation method. The software and hardware of flight controller are designed for flight test of MDFAV systematically. Experiment results demonstrate excellent tracking performance and robustness, and at the same time, environment disturbances are suppressed effectively.

Desarrollo de un prototipo de plataforma de transporte para terminales aéreas

Desarrollo de un prototipo de plataforma de transporte para terminales aéreas

Collaboration System Design of the Transportation Platform

Collaboration System Design of the Transportation Platform

IMPROVING THE DESIGN OF ROLLING STOCK FOR TRANSPORTATION CONTAINERS BY RAIL

Purpose. The growth of rail container traffic and competition with road carriers create prerequisites for finding new ways to organize transportation. Analysis of technical information shows that at present up to 80% of international transport of large goods carried out using containers that allow you to organize the delivery of goods using different types of transport. Therefore, the purpose of this study is to develop technical solutions to improve the design of rolling stock for the transport of containers. Methodology. Transportation of goods in large-tonnage containers is one of the perspective directions of development of railway transport. The constant growth of such transportation increases the need for specialized wagon-platforms. Therefore, the research methodology consists of analyzing the advantages and disadvantages of existing structures of specialized carriages for the transport of containers and developing technical solutions for the construction of rolling stock for the transport of containers using modern materials and advanced engineering technologies. Findings. The innovative designs of carriages-platforms for the transport of containers, developed by PDTB DNURT, considered, taking into account both the worked out technical solutions and the perspective developments in the field of railway engineering. Originality. Improved simulation models and calculation schemes of railway carriages for the transport of containers by rail, which, unlike existing ones, allow us to take into account not only the design features and the layout of the containers, but also the degree of influence of the manufacturing technology of the main structural elements. Practical value. Developed technical solutions to improve platform for transportation of containers by rail can used in the formulation for the production of new models of cars at machine-building enterprises and the modernization of existing models during repairs.

Legal Issues Arising in Developing and Operating a Transportation Platform

Legal Issues Arising in Developing and Operating a Transportation Platform

A mobile-based barrier-free service transportation platform for people with disabilities

The transportation problems faced by the elderly and people with disabilities have received attention from policymakers and practitioners. Eden Social Welfare Foundation (Eden) has observed the challenges and expectations from the elderly and people with disabilities while operating Rehabuses and long-term care services in Taiwan. This study presents a social business model for people with disabilities based on Eden's mobile-based service platform for barrier-free transportation. This social business model illustrates how information and communication technology (ICT) is integrated with transport service providers and government resources to satisfy the transportation needs of disabled people.

Gyrolift, a new way of verticalisation on mobile personal transporter

This paper describes a developed verticalisation function integrated into a mobile transportation platform. The system is known as Gyrolift, a type of mobility-aided wheelchair based on a two-wheel auto-balanced personal transporter (PT). The system is equipped with a robotic module designed for helping users reach a standing position from a seated one. It also allows them to safely keep the standing posture to interact with the environment and have access to objects at a high level. The main contribution of this work resides in the design of verticalisation solution that ensures both the trajectory adapted to the user while respecting the constraint of the mobile platform. This solution is designed to not only keep the user in a standing posture but also to prevent instability of the PT. In order to justificate its feasibility, the proposed device as human-aid was evaluated in a series of simulations. Experimental tests were also conducted.

Experimental and numerical research on the axial and radial concentration distribution feature of miscible fluid interfacial mixing process in products pipeline for industrial applications

During the process of sequential transportation of miscible but dissimilar fluid (MBDF) in pipelines, the adjacent of different kinds of MBDF will be mixed, leading to form a section of a liquid mixed segment in the pipeline which is an important aspect of mass transfer, especially in the multiproduct pipeline. This paper represents an experimental study of sequential transportation of MBDF in a single pipeline and thereby a set of experimental loop platform for sequential transportation has been designed. Several dimensionless indices including mixed segment length, axial tailing length, and radial difference have been proposed to measure the concentration distribution in the mixed segment (CDMS) in both axial and radial directions of a pipeline. A novel numerical model to simulate the CDMS of MBDF transported in a pipeline is also proposed and solved, where the turbulence effect, the difference in physical properties of the front and tail fluid, and the adsorption effect are taken into account to investigate the diffusion coefficient and concentration distribution. The complex flow and mass transfer in transportation process can be observed in the experiment and the results illustrate that the concentration profile is asymmetrical respect to the 50% concentration point at different time and distance, which is not revealed in the solutions of existing both numerical theory and empirical formula. The simulated results figure out the radial and axial feature of CDMS and achieve a good agreement with the experimental length of the mixed segment. Thus, the tailing phenomenon is found, analyzed and simulated. Those mentioned-above 3 kinds of effects are considered to form the tailing phenomenon in CDMS interactively. The overall uncertainty of the proposed dimensionless parameters has also been analyzed. The results reveal that the length of the tail of the mixed segment (LTMS) is 22% longer than that of the front (LFMS) when taking the 5% change of concentration as the judging criteria. The detection probe located at the center of the pipe earliest detects the CDMS while the probe near the pipe wall does latest. The corresponding detection time difference is up to 25.64%. Finally, the research results can provide guidance for delivering the refined oils sequentially and cutting the mixed segment in the industrial pipelines.

A mobile platform for collaborative urban freight transportation

Abstract In recent years, online shopping is increasing the flows that transit into the urban areas. An increase in demand corresponds to an increase in operational complexity for logistics operators and environmental issues. This paper presents the development of a mobile platform integrated with wearable features to foster the collaboration between different actors in urban freight logistics.

A Tunable Ionic Diode Based on a Biomimetic Structure‐Tailorable Nanochannel

AbstractA tunable ionic diode is presented that is based on biomimetic structure‐tailorable nanochannels, with precise ion‐transport characteristics from ohmic behavior to bidirectional rectification as well as gating properties. The forward/reverse directions of the ionic diode and the degree of rectification can be well‐regulated by combining the patterned surface charge and the sophisticated structure. This system creates an ideal platform for precise transportation of ions and molecules, and potential applications in analytical sciences are anticipated.

A Tunable Ionic Diode Based on a Biomimetic Structure-Tailorable Nanochannel.

A tunable ionic diode is presented that is based on biomimetic structure-tailorable nanochannels, with precise ion-transport characteristics from ohmic behavior to bidirectional rectification as well as gating properties. The forward/reverse directions of the ionic diode and the degree of rectification can be well-regulated by combining the patterned surface charge and the sophisticated structure. This system creates an ideal platform for precise transportation of ions and molecules, and potential applications in analytical sciences are anticipated.

SIBERIAN TRANSPORT & LOGISTIC PLATFORM: A TOOL TO ATTRACT INVESTMENT

[For the English abstract and full text of the article please see the attached PDF-File (English version follows Russian version)].ABSTRACT The problem of labor and social mobility of people in conditions of economic uncertainty and search for strategies for economic growth is becoming increasingly important. And in the language of the transport worker, in this case, we should talk about the points of «attraction of passenger flow». The article deals with the issues of expanding and strengthening communication links between people by improving the service and providing customers with combined transport and logistics services. The organization of a regional trans-logistic (further on understood by the authors as integration of transportation and logistics) platform - the network economic space of interaction and cooperation of transport companies on the basis of an integrated approach to servicing the population and modern information technologies - is proposed as a tool for solving such a complex task. Keywords: mobility, transport and logistics services, value chains, technological integration, integrated approach model, network cooperation, trans-logistic platform.

Cobalt oxyhydroxide/graphene oxide nanocomposite for amelioration of electrochemical performance of lithium/sulfur batteries

Cobalt oxyhydroxide combination with graphene oxide (CoOOH@GO) as a novel conductive matrix is developed for high performance lithium/sulfur batteries. Enhancement retention of polysulfide species into matrix of cobalt oxyhydroxide anchored on graphene oxide flakes by strong chemical binding of carbon-sulfur is demonstrated. Sulfur incorporated in the sheet-like morphology of CoOOH@GO delivers high initial discharge specific capacity of 1190.85 mAh/g, which raises 260 mAh/g with respect to graphene oxide/sulfur (GO/S) as a cathode material. Furthermore, CoOOH@GO/S maintains the average coulombic efficiency of 96 % after 300 cycles at 1 C rate with capacity retention of about 61 %. Good current rate capability of CoOOH@GO/S cathode reveals that the resulting composite is open platform for electrolyte diffusion and fast ion transportation leading to the improved electrochemical performance of lithium/sulfur batteries.

Intermediate outcomes with ex-vivo allograft perfusion for heart transplantation

The Organ Care System, an ex-vivo heart perfusion platform, represents an alternative to the current standard of cold organ storage that sustains the donor heart in a near-physiologic state. It is unknown whether using the Organ Care System influences 2-year outcomes after heart transplantation. We reviewed our institutional experience to compare 2-year outcomes for patients randomized to the Organ Care System or standard cold storage. Between 2011 and 2013, heart transplant candidates from a single tertiary-care medical center enrolled within the PROCEED II trial were randomized to either standard cold storage or the Organ Care System. Outcomes assessed included 2-year survival, freedom from cardiac allograft vasculopathy (CAV), non-fatal major cardiac events (NF-MACE), biopsy-proven cellular rejection (CMR) and biopsy-proven antibody-mediated rejection (AMR). Thirty-eight patients were randomized to the Organ Care System (n = 19) or cold storage group (n = 19). There was no significant difference in 2-year patient survival (Organ Care System: 72.2%; cold storage: 81.6%; p = 0.38). Similarly, there were no differences in freedom from CAV, NF-MACE, CMR or AMR. The Organ Care System group had significantly longer total ischemia time (361 ± 96 minutes vs 207 ± 50 minutes; p < 0.001) and shorter cold ischemia time (134 ± 45 minutes vs 207 ± 50 minutes; p < 0.001) compared with the cold storage group. The Organ Care System did not appear to be associated with significant differences in intermediate results compared with conventional strategies. These results suggest that this ex-vivo allograft perfusion system is a promising and valid platform for donor heart transportation.

Innovative Project of Prototype Railway Wagon and Intermodal Transport System

A special wagon with a low rotatable loading platform for transportation of truck vehicles by rail was developed in Military University of Technology in the Department of Mechanics and Applied Computer Science in Warsaw. The essence of such reloading is to place the semitrailer on a special rotatable platform with the use of a truck tractor. The structure can be used for transportation of different types of vehicles such as tractors, trucks, trailers, semitrailers and cargo containers. The wagon allows quick and fast loading and unloading without any platform infrastructure or terminals. An intermodal transport system based on an innovative concept of the railway wagon, which will use the national railway infrastructure, was developed. The process of loading and unloading the trailers can be performed considering a whole train or individual wagons from any part of the train (no cranes needed). This type of railway wagon will allow transport companies to save time and money for road transport. The advantages of this construction are reduction of the negative impact on the environment as well as an increase of road safety by reducing the number of vehicles on the roads. As part of the work on the wagon and the intermodal transport system, a strength test of the wagon structure was carried out and the effort of the basic components of a the wagon and a complete structure was estimated. For this purpose, numerical analysis was used.

Development and Implementation of a Wheeled Inverted Pendulum Vehicle Using Adaptive Neural Control with Extreme Learning Machines

A novel neural control on basis of extreme learning machines (ELMs) is proposed to control wheeled inverted pendulum vehicle, which is a human transportation platform mounted on two coaxial wheels. A dynamic self-balancing control scheme for such vehicle is constructed which depends on the single-hidden layer feedforward network approximation capability of combing ELMs to capture vehicle dynamics. It is superior to conventional intelligent control by using extreme learning machines since the proposed neural control adjusts the output weight parameters online on basis of the Lyapunov synthesis approach. Experimental results are provided to demonstrate that the vehicle can maintain upright posture stably with the external disturbances based on the proposed control scheme.

Evaluating user interaction with a web-based group decision support system: A comparison between two clustering methods

Task-Technology Fit theory and the Technology Acceptance Model identify system utilization as an important indicator for the performance of complex software systems. Yet, empirical evaluations of user interaction with group decision support systems are scarce and often methodologically underdeveloped. For this study we employed an exploratory evaluation of user interaction in the context of web-based group decision support systems. Specifically, we used information-rich server logs captured through a web-based platform for participatory transportation planning to identify groups of users with similar use patterns. The groups were derived through multiple sequence alignment and hierarchical cluster analysis based on varying user activity measures. Subsequently, we assessed the reliability of the classifications obtained from the two clustering methods. Our results indicate limited reliability of classifications of activity sequences through multiple sequence alignment analysis and robust groupings from hierarchical cluster analysis for user activity initiations and durations. The presented work contributes a novel methodological framework for the evaluation of complex software systems that extends beyond the common approach of soliciting user satisfaction.

Study on the Transformation of the Development Model of the National Public Information Sharing Platform for Transportation &amp;amp; Logistics

The article researches on the development model of the National Public Information Sharing Platform for Transportation&amp; Logistics (LOGINK), in which the author introduces the function orientation of the LOGINK. Based on the current development status of the platform, the article predicts the development trend in the future. Then, it analyzed the necessary of the transformation of the LOGINK’s development model. In order to ensure the sustainable development of the platform, this paper proposes that the development model should be changed from “Charity” to “Charity + Appreciation”. Lastly, the article gives a plan about the service model and profit model of the platform in the future.

Data-Driven Geospatial-Enabled Transportation Platform for Freeway Performance Analysis

The burgeoning field of big data nowadays has motivated the development of innovative architecture for better exploiting and exploring huge amount of multidisciplinary data. Inspired by the concept of eScience, the on-line transportation platform Digital Roadway Interactive Visualization and Evaluation Network (DRIVE Net) is developed in this study for the purpose of transportation data sharing, integration, visualization, and analysis. The major research goal of the DRIVE Net system can be summarized in threefold. First, it provides the repository service to facilitate data sharing and integration. Second, the system is capable of visualizing large sets of transportation data, helping users to perceive and understand the data. Third, the interactive and computational functionalities built into the DRIVE Net allow users to perform a variety of statistical modeling and analysis on multiple data sources, assisting with users to draw meaningful inferences and to make informed decisions. This research thus developed such an eScience platform addressing the aforementioned challenges for transportation applications. To particularly demonstrate the analytical capability of DRIVE Net, a new approach that automates real-time freeway performance measurement is developed and implemented onto the system. The proposed method provides quantitative evaluation of network-wide freeway performance to facilitate decision making in transportation operations and management.