scholarly journals Influence analysis of track irregularity on running comfort of Maglev train

2018 ◽  
Vol 4 (2) ◽  
pp. 129-140 ◽  
Author(s):  
Jingyu Huang ◽  
Xiong Zhou ◽  
Liwei Shang ◽  
Zhewei Wu ◽  
Weinan Xu ◽  
...  
Keyword(s):  
Control System ◽  
Dynamic Simulation ◽  
Ride Comfort ◽  
Simulation Analysis ◽  
Simulation Software ◽  
Dynamics Simulation ◽  
Control Effect ◽  
Vibration Acceleration ◽  
Maglev Train ◽  
Track Irregularity

Background: In this article, the TR08 car of the Shanghai Magnetic Train Demonstration Line was prototyped and a multi-body dynamics simulation model was established. And based on the low-interference track irregularity power spectrum in Germany, track irregularity data was obtained. Used dynamic simulation software, completed the dynamic simulation analysis of the vehicle-rail model controlled by the proportion-integral-derivative control system PID parameters. It can be concluded that the vibration of trains passing through irregular tracks at different speeds, and evaluated its comfort. The optimal solution for the control of the PID parameters of the train also has been derived. Aim: Evaluation of operational comfort and suspension gap control effect of Shanghai Maglev Train Demonstration Line by simulation analysis. Materials and methods of the studies: Simulation analysis. Results: The vibration acceleration and suspension gap of Shanghai Maglev Train Demonstration Line has been obtained. Conclusion: By adjusting the parameters of PID control system, the vibration acceleration of train can be reduced and the ride comfort can be improved.

The Simulation and Design on Control System of Magneto-Rheological Damper Seat

2013 ◽  
Vol 278-280 ◽  
pp. 1639-1643
Author(s):  
Xiao Min Qi ◽  
De Zhang Xu ◽  
Jian Bin Wang
Keyword(s):  
Mathematical Model ◽  
Control System ◽  
Control Theory ◽  
Active Control ◽  
Ride Comfort ◽  
Simulation Analysis ◽  
Vibration Acceleration ◽  
Magneto Rheological

In this paper, the magneto-rheological damper is installed in the seat, using semi-active control theory and methods, dynamics mathematical model of the magneto-rheological damper seat is established, the fuzzy semi-active controller based on the magneto-rheological is designed, and then the simulation analysis on the system is completed by the software of MATAB/Simulink. The results of simulation show that the semi-active seat based on the magneto-rheological can markledly suppress the vibration acceleration and improve the ride comfort of the seat.

Dynamic Simulation Analysis of the Crane Hoisting Process Based on Adams

2014 ◽  
Vol 940 ◽  
pp. 132-135 ◽  
Author(s):  
Yi Fan Zhao ◽  
Ling Sha ◽  
Yi Zhu
Keyword(s):  
Dynamic Simulation ◽  
Simulation Analysis ◽  
Three Dimensional ◽  
Wire Rope ◽  
Dynamics Simulation ◽  
Dimensional Model ◽  
Analysis Model ◽  
Three Dimensional Model ◽  
Adams Software ◽  
Simulation Results

Established the dynamics simulation analysis model of crane hoisting mechanism based on the theory of dynamics in Adams software, and then through the three dimensional model of lifting mechanism dynamics entities, the constraints, load, drive can be added, the motion law can be defined to simulation analysis the change of the force of wire rope, the change of displacement, velocity and acceleration of lifting weight in the lifting process. On the basis of the simulation results, it can make a great improvement for the structure of crane and provide a meaningful theoretical reference for the hoisting machinery innovation design.

Research on Dynamics Simulation of Buffering Process of Docking Mechanism

2014 ◽  
Vol 701-702 ◽  
pp. 748-752
Author(s):  
Yuan Zhang ◽  
Li Li Zhou ◽  
Jian Wang ◽  
Chang Zhen Fan
Keyword(s):  
Mathematical Modeling ◽  
Dynamic Simulation ◽  
Simulation Analysis ◽  
Structure Optimization ◽  
Working Life ◽  
Dynamics Simulation ◽  
Buffer System ◽  
Factors Influencing ◽  
Docking Mechanism ◽  
Important Basis

On-orbit service technology can extend the working life of the spacecraft, and improve the ability to perform various tasks. Docking mechanism is the key equipment of the space docking. The cushion performance of the system determines the dynamic characteristics in the docking process, and it is one of the important factors influencing the docking success or not. It is established that mathematical modeling of the new grasping mechanism in the buffering process, due to lack of the experiment equipments, the dynamic simulation on computer is an effective method to test and verify the parameters or evaluate the performance of the buffer system designed. Simulation analysis is conducted to get the corresponding buffer force for four different sets of buffer parameter, and it provides important basis for docking cushioning structure optimization.

The Simulation Analysis and Modeling of the Coupling Vibration Absorber System for the Wheel Loader

2011 ◽  
Vol 121-126 ◽  
pp. 2358-2362 ◽  
Author(s):  
Zhun Wang
Keyword(s):  
Control System ◽  
Research And Development ◽  
Dynamic Models ◽  
Simulation Analysis ◽  
Vibration Reduction ◽  
Simulation Software ◽  
Vibration Absorber ◽  
Coupling Vibration ◽  
Matlab Simulink ◽  
Wheel Loader

In accordance with the Coupling vibration absorber system, introduced to reduce the vibration of the wheel loader at driving, designed are two dynamic models for the loaders either with the application of vibration absorber system or without that of it. The simulation analysis of the vibration reduction, with the help of the simulation software Matlab/ Simulink, shows that the vibration absorber system may reduce not only the vehicle vibration effectively but also that of the work device, thus providing the basis for the further research and development of the riding control system.

scholarly journals Path Tracking Control of Field Information-Collecting Robot Based on Improved Convolutional Neural Network Algorithm

Sensors ◽  
2020 ◽  
Vol 20 (3) ◽  
pp. 797 ◽  
Author(s):  
Yili Gu ◽  
Zhiqiang Li ◽  
Zhen Zhang ◽  
Jun Li ◽  
Liqing Chen
Keyword(s):  
Neural Network ◽  
Control System ◽  
Convolutional Neural Network ◽  
Sliding Mode ◽  
Soft Soil ◽  
Simulation Software ◽  
Dynamics Simulation ◽  
Information Collection ◽  
Soil Conditions ◽  
Field Information

Due to the narrow row spacing of corn, the lack of light in the field caused by the blocking of branches, leaves and weeds in the middle and late stages of corn growth, it is generally difficult for machinery to move between rows and also impossible to observe the corn growth in real time. To solve the problem, a robot for corn interlines information collection thus is designed. First, the mathematical model of the robot is established using the designed control system. Second, an improved convolutional neural network model is proposed for training and learning, and the driving path is fitted by detecting and identifying corn rhizomes. Next, a multi-body dynamics simulation software, RecurDyn/track, is used to establish a dynamic model of the robot movement in soft soil conditions, and a control system is developed in MATLAB/SIMULINK for joint simulation experiments. Simulation results show that the method for controlling a sliding-mode variable structure can achieve better control results. Finally, experiments on the ground and in a simulated field environment show that the robot for field information collection based on the method developed runs stably and shows little deviation. The robot can be well applied for field plant protection, the control of corn diseases and insect pests, and the realization of human–machine separation.

Static Strength Analysis of Components of Flap Control System for a Certain Type of Aircraft

2013 ◽  
Vol 401-403 ◽  
pp. 422-426 ◽  
Author(s):  
Feng Zhu Zheng ◽  
Wei Min Cui ◽  
Hong Juan Li
Keyword(s):  
Finite Element ◽  
Control System ◽  
Optimization Design ◽  
Simulation Analysis ◽  
Element Model ◽  
Static Strength ◽  
Strength Analysis ◽  
Aircraft Control ◽  
Control Effect ◽  
Aircraft Control System

Pull rod and rocker arm are important parts of aircraft control system, its strength, stiffness and stability can largely affect the aircrafts control effect, sometimes the flight safety will be influenced [2]. A type of aircraft control system has been upgraded and modified, therefore the pull rod and rocker arm of the flap control system need to take the static strength test. Based on field test and finite element simulation analysis, this paper has the static strength of pull rod and rocker arm checked, and to verify the correctness of the finite element model and lay foundation for the optimization design of components of aircraft control system.

Simulation Analysis on Ride Comfort of Heavy Vehicle

2013 ◽  
Vol 339 ◽  
pp. 425-429 ◽  
Author(s):  
Song Wang ◽  
Da Wei Liu ◽  
Wei Liu
Keyword(s):  
Evaluation Method ◽  
Ride Comfort ◽  
Simulation Analysis ◽  
Dynamics Simulation ◽  
Heavy Vehicle ◽  
Superposition Method ◽  
Body Dynamics ◽  
Ride Comfort Evaluation ◽  
Multi Body ◽  
Body Dynamic

In this paper, a detailed rigid-flexible coupling multi-body dynamic model of heavy vehicle was established using multi-body dynamics method, and B class road model was built using harmonic superposition method. Then, the platform of heavy vehicle dynamics simulation was established. The driver seat acceleration and tire dynamic load were simulated at different speeds under the input of different random road excitations. According to the ride comfort evaluation method provided by ISO2631-1, total weighted root-mean-square (RMS) acceleration evaluation method was used to evaluate the ride comfort of heavy vehicle at different ride speeds.

Dynamic Simulation Analysis for Docking Mechanism of On-Orbit-Servicing Satellite

2014 ◽  
Vol 487 ◽  
pp. 313-318
Author(s):  
Yuan Zhang ◽  
Jian Wang ◽  
Yan Song ◽  
Li Li Sun
Keyword(s):  
Mathematical Model ◽  
Simulation Analysis ◽  
Initial Conditions ◽  
Euler Method ◽  
Simulation Software ◽  
Dynamics Simulation ◽  
Collision Dynamics ◽  
Docking Mechanism ◽  
Collision Force ◽  
The Mathematical Model

The new type of three jaw docking mechanism is designed for use in orbiting spacecraft, the mathematical model is given and its working characteristics are analyzed. By establishing the mathematical model of the interaction of the parts under the different coordinate system, it is obtained that the corresponding kinematic characteristics; contact collision dynamics model is established by using the Hertz model theory, dynamic equation is established by Newton-Euler method, and simulation analysis are carried out by using the dynamics simulation software ADAMS, through the simulation analysis of three groups with different initial conditions, the results show that it achieve reliable grasp with good performance, it provides the lock claw curve in contact collision force and movement characteristics curve. These curves provide reference to improve the performance of docking mechanism.

Simulation Analysis of Wheeled Vehicle Skid-Steer

2011 ◽  
Vol 328-330 ◽  
pp. 2203-2206
Author(s):  
Yue Fang Wang ◽  
Xiao Rui Dong
Keyword(s):  
Simulation Analysis ◽  
Simulation Software ◽  
Velocity Curve ◽  
Dynamics Simulation ◽  
Initial Condition ◽  
Body System ◽  
Wheeled Vehicle ◽  
Vehicle Velocity ◽  
The World ◽  
Braking Process

In this paper, the wheeled vehicle is regard as a multi-rigid-body system and simulation model of the vehicle is established firstly by using dynamics simulation software of mechanical system ADAMS which is used most widely in the world. Secondly, through setting the initial condition and inputting various parameters, simulation analysis of skid-steer during the unilateral braking process and swerving braking process that the vehicle runs roundly in constant speed of 10km/h and 20km/h respectively is performed. In addition, vehicle velocity curves are recorded, vehicle yaw angular velocity curve are showed, Side accelerated speed curve is seen, the turning track curve of centre is drawn and the results are contrasted. Finally, some conclusions are reached that the vehicle minimum turning track radius decrease immensely than the radius which does not adopt unilateral braking and vehicle velocity could be controlled in a small velocity rage when vehicle is steering braking.

Dynamic Simulation Analysis of a Cracked Flexible Rotor Supported on Rotor-Rolling Bearing Based on Virtual Prototyping Technology

2010 ◽  
Vol 156-157 ◽  
pp. 293-297
Author(s):  
Tian Han ◽  
Jie Bai ◽  
Zhong Jun Yin
Keyword(s):  
Nonlinear Dynamics ◽  
Dynamic Simulation ◽  
Transverse Vibration ◽  
Simulation Analysis ◽  
Virtual Prototyping ◽  
Rolling Bearing ◽  
Simulation Software ◽  
Vibration Response ◽  
Virtual Prototyping Technology ◽  
Bearing System

The complex nonlinear dynamics of a rotor-rolling bearing system with crack is built by dynamic simulation software ADAMS. The transverse vibration response and swing response of rotor are studied on the basis of considering both the nonlinear contact force of rolling bearing and the impact of stiffness caused by crack. Furthermore, the influence factors of transverse vibration response are researched including speed, crack depth, crack angle and eccentricity. The simulation analysis demonstrated that it is an effective method to solve nonlinear dynamics of rotor-rolling bearing system with crack based on virtual prototyping technology. It provides a new method of feasibility study for fault diagnosis in the future.

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