Monorail Vehicle Research Articles

Monorail vehicle model to study influence of tyre modelling on overall dynamics

A mathematical model of a straddle type monorail vehicle has been developed in order to study its stability and the effect of tyre modelling techniques on its dynamic response. An algorithm was developed to build equations of motion using a multi-body systems method, considering deviations of the guideway as forced inputs. Tyre models consider both radial and lateral forces. Four methods to calculate lateral forces were implemented and results were compared. One of the four vehicle models is linear and parameterised with the longitudinal velocity, enabling the stability analysis based on eigenvalues locus. The modal damping decreases with the increase of longitudinal velocity, asymptotically approaching to a stable system. Results show that the influence of tyre radial force on its cornering stiffness can be an important effect to consider in the monorail numerical modelling, increasing the accuracy to predict the vehicle overall dynamics and tyre lateral forces.

Feasibility Analysis on Application of Modified Concrete Contains Rubber Powder of Straddle Type Monorail Train Waste Tire

As a kind of solid waste, the straddle type monorail vehicle waste tire was not only increased the operating costs, but also brought environmental pollution problems; while at the same time the rigidity value of bridge-subgrade transition section in existing monorail system was relative big and the settlement difference still exists between transition section and subgrade, these problems would resulted in tensile failure of the transition section under monorail train loads. In order to solve those problems, an idea that using the modified concrete contains rubber powder of straddle type monorail train waste tire as the material of bridge-subgrade transition section is proposed. The finite element software Midas/GTS was being used to analyse the stress and settlement of bridge-subgrade transition section under static and dynamic load. These results shown that, when the rubber concrete was filled above the reference concrete, the maximum stress of bridge-subgrade transition section reduces significantly, the average reduction value is 34.82%.at the same time according to the fact, this new methods will save more than one million operating costs per year of Chongqing monorail transit system.

Dynamic interaction of the monorail–bridge system using a combined finite element multibody-based model

To assess the dynamic behavior of monorail–bridge system, an innovative model of train–guideway interaction has been developed based on multibody dynamics and finite element simulation. A finite element model of guideway structure for a particular monorail system is built up using parametric design language, considering a specific length of straddle monorail line in three dimensions. Both straight and curved track geometries are modeled to simulate the actual bridge infrastructure. Flexible elements are adopted for the guideway beams consisting of reinforced concrete profiles to increase the accuracy of the numerical simulations in a more realistic way. The bridge model indeed, is simulated using a beam-frame structure of composite steel–concrete material. A multibody simulation of monorail vehicle is then introduced using the commercial multibody software MSC Adams. The three-dimensional multibody model of the monorail vehicle together with the bridge subassemblies is eventually implemented in multibody environment. The entire dynamic model of the vehicle-track system consists of all flexible and rigid body elements. Dynamic responses of the vehicle and bridge system are then extracted for different loading conditions. The proposed numerical model is validated using some dynamic simulation results of the system from the vehicle manufacturer in the selected case study. The model is further verified against several analytical and measurement results reported in the literature both for straight and curved track configurations. The result of dynamic simulations gives an overview about the dynamic forces and reactions that can appear in bridge structure due to the train movement.

Simulation Analysis of Electro-Pneumatic Proportional Fuzzy-PID Control System Based on AMESim/Simulink

The test rig for hydro-pneumatic converter used in straddle type monorail vehicles was researched, and its electro-pneumatic proportional control system was set up and simulated based on AMESim/Simulink. Compared fuzzy-PID (Proportion Integral Derivative) controller with PID controller through fuzzy logic tool box in Simulink, the results indicate that, this electro-pneumatic proportional control system can meet design requirements better, and fuzzy-PID controller has higher accuracy and stability than PID controller.

The Impact of Suspension Stiffness Parameters on the Curve through Performance of Straddle Type Monorail Vehicle Based on Sensitivity Analysis

The curve through performance of straddle type monorail vehicle include performance-oriented, preventing derailment stability, preventing vehicle overturning stability, tire wear performance, which are evaluated by oriented torque, the minimum vertical force of horizontal wheels, vehicle body roll angle, overturning coefficient, the sum of tire forces scalar. With the virtual simulation model in ADAMS, this paper analyzes the impact of the monorail vehicle suspension stiffness parameters on the evaluation indexes by sensitivity analysis.

The Impact Analysis of Tire Parameter for Tire Wear When Monorail Vehicle Curve Driving

monorail spatially coupled dynamic modeling which has three directions attached contacts wheel have been established. According to the simulation and experimental results, dynamic model was validated. based on the dynamic coupling modeling , the tire parameter influence trends for the tire wear of walking wheel’s tires were analyzed when monorail vehicle curve driving. The analysis result revealed that because the contact of straddle-beam monorail is special, with the cornering stiffness increases of walking wheel tire, by the impact of the contact radial force from guide wheels and stabilizing wheels, the lateral forces of walking wheel is gradually increasing. tire wear speed increases at a constant when monorail vehicle curve driving.

혼합제동기능을 이용한 유압제동 제어시스템 설계

The bogie of monorail vehicles applies rubber wheel system not steel wheel system. In addition, The structure of the bogie is very complicated because vehicle operates on the elevated road and vehicle drives with wrapping the guide way. When the monorail vehicle applies air brake system, lower device of vehicle may be complex and some devices may be limited. On the other hand, hydraulic brake equipment is compact and not weighing. Braking force is also outstanding compared with air brake so the hydraulic brake equipment is suitable for monorail vehicle. Also urban transit system such as monorail, applies mixed system both friction brake and electric brake in order to save electric energy. But application case of hydraulic brake in the country is very rare because hydraulic brake have difficulty in satisfaction of control requirement and maintenance. Therefore, this study suggests ways to design hydraulic brake system with blending brake for monorail vehicle and applies the ways to future monorail.

Research on Electro-Hydraulic Proportional Self-Tuning Fuzzy-PID Control System Based on MATLAB

The bogie separated equipment for straddle type monorail vehicle was researched, and the mathematics model of proportional hydraulic valve cylinder lifting system was set up and simulated. Based on the PID controller theory and the principle of fuzzy control, the fuzzy self-turning fuzzy-PID controller was designed. According to the fuzzy logic tool box and simulink of MATLAB, the simulation study was carried out. The results indicate that, the self-tuning fuzzy-PID controller can satisfy the requirements of the control system well.

A Study on Co-Simulation for Rotating Mechanism of Bogie Separation Device Based on ADAMS/MATLAB

In the process of bogie separation device operations, rotating system is required to push bogie and settlement beam to rotate . After the completion of bogie wheel replacement and maintenance, they need to be pushed back to original position. This paper explains working principle of rotating mechanism of monorail vehicle bogie separation device and performs co-simulation and analysis of rotating mechanism based on ADAMS/MATLAB. Analysis results show that the rotating hinge mechanism and its proportional control system can completely meet the requirements of the rotary motion.

Research on the Expert System of Detection and Management for the Tire Wear of Straddle Type Monorail Vehicle

Based on the experiential data from the operation of Chongqing No.2 light rail for six years, and combined with the deep analysis for the tire wear characteristic of the straddle type monorail vehicle, this paper presents an expert system of detection and management for the tire wear of straddle type monorail vehicle. Firstly, this paper will analyze the wear characteristic of the straddle type monorail vehicle tire. Secondly, this paper will give the basic design idea of the expert system. And finally the design method of the expert system will be presented with the use of access software and visual basic language. Practices show that the expert system presented in this paper can meet the actual need of detection and management for the tire wear of the straddle type monorail vehicle, and is effective for reducing repair cost and increasing the economic benefit for operation of urban railway traffic.

Crash Simulation of Straddle-Type Monorail Vehicle Body and Human Injury Research

In this paper, Based on collision simulation theory, a straddle-type monorail vehicle was considered as the research object. A collision model of Straddle-type monorail vehicle with human body model was set up. The course of collision between the straddle-type monorail vehicle and a rigid wall was simulated. During the body collision process, some parameters, such as velocity, displacement, energy and the injury of diver, were analyzed. According to the simulation results, the stiffness of vehicle and ability of energy absorption were evaluated.

Possibility of monorail vehicle equipped regenerative brake is evaluated by energy efficiency

Possibility of monorail vehicle equipped regenerative brake is evaluated by energy efficiency

A unified fuzzy logic approach to trajectory planning and inverse kinematics for a fire fighting robot operating in tunnels

In this paper a fuzzy logic approach to automatic trajectory planning and closed-loop inverse kinematics for a robotic system purposely designed to extinguish fires in road and railway tunnels is presented. The robot is composed of a self-cooling monorail vehicle carrying a fire fighting monitor. A fuzzy inference system is adopted for the automatic generation of the task-space trajectory for the robot and to distribute the motion among the available joints in the presence of redundant degrees of mobility. Redundancy also allows assigning additional tasks besides the primary task. Simulation case studies are presented to test the performance of the whole system in a typical intervention scenario.

산업용 단선 궤도 차량의 주행 동특성에 관한 연구

An OHT(Over Head Transportation) vehicle is an example of the industrial monorail vehicle, and it is used in the automobile, semiconductor, LCD manufacturing industries. OHT vehicle is moved by main wheels and guide rollers. The major function of the main wheel is to support and drive the OHT vehicle. The roles of the guide roller is the inhibition of derailment and steering of the OHT vehicle. Since the required vehicle velocity becomes faster and the required load capacity is increased, the durability characteristics of the wheel and roller, which was made of urethane. need to be increased. So it is necessary to estimate the fatigue life cycle of the wheel and roller. In this study, OHT dynamic model was developed by using the multi body dynamic analysis program ADAMS. Wheel and roller are modeled by the 3-D surface contact module. Especially. motor cycle tire mechanics is used in the wheel contact model. The OHT dynamic model can analyze the dynamic characteristic of the OHT vehicle with various driving conditions. And the result was verified by a vehicle traveling test. As a result of this study, the developed model is expected to predict wheel dynamic load time history and makes a contribution to design of a new monorail vehicle.

The Brennan Mono-Rail System

A LARGE company of engineers and others interested, including representatives of the Admiralty and of the War Office, assembled at the Brennan Torpedo Works, near Chatham, on Friday, February 25, to witness a demonstration of Mr. Brennan's mono-rail vehicle. The vehicle shown, which is the first of its kind, has been designed for rough military purposes, not for high speeds, and the trials on this occasion were intended to show its adaptability for this kind of work. A general description of the car and the experimental track appeared on p. 79 of our issue for November 18, 1909, to which we may refer our readers supplemented with the illustration now shown of the vehicle standing on one of the sharp curves. In this illustration may be noticed the radiators for cooling the circulating water required for the petrol motors, these radiators being secured to the front of the machinery cab: the front boaie with its two wheels, the rear wheel being driven by side rods and balanced cranks from one of the two electromotors; also one of the side chocks, on which the car may rest when required for unloading or other purposes. There is a chock on each side of the car. Mr. Brennan is the centre figure in the machinery cab.