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In order to improve vehicle riding comfort and handling stability, a PID control system was designed. Regarding electronically controlled air suspension of a coach as the research subject, the PID control theory is applied to vehicle air spring suspension system. The PID control system is built up in Matlab/Simulink based on the a-quarter-vehicle model for simulating. The RMS of the vertical vibration...
To strengthen the parts universality of a series of passenger cars and improve a passenger car ride comfort, the elastic components and the installation location of the vehicles are optimized. The optimization scheme of widening, lengthening the rear suspension leaf spring, and narrowing diameter of the front suspension torsion bar spring are analyzed, then the front and rear suspension stiffness...
This paper describes the mathematical model and simulation of controller for active suspension with Linear Quadratic Regulator (LQR) controller and about the improvement in performance. In this work, a controller is designed for active suspension system and simulated for both passive and active suspension system using SIMULINK in MATLAB. Two controller design approaches, namely conventional method...
Aimed at the effect of variable coefficients and the constant coefficients to the system, a quarter-car two degree freedom suspension vibration model is described, with the aid of matlab alternating senior programmable language, the algorithm is gained through function file, the simulation model of the road noise and the suspension system is obtained. Moreover, The one order standard sensitivity function...
In order to lead properly an electric vehicle project, it is very important to assess and optimize the driver perception during manoeuvres such as tip-in and tip-out. This aspect of vehicle customer perception is called “drivability”. To meet these objectives, a co-simulation platform has been developed between models under LMS-AMESim® and Matlab/Simulink®. The first model represents the physical...
The design of steering linkage must meet Ackerman steering characteristic, and the change of toe-in angle during wheel jumping should be the smallest. The virtual prototype model of McPherson suspension and steering linkage is established by using the ADAMS software. Due to the ADAMS software's limitation in optimized method, an optimize method that combine MATLAB genetic algorithm toolbox with ADAMS...
The MAGLEV is a kind of new type high speed train in the world which is levitated and guided over the track using electro magnetic forces. Because the electro magnets are unstable, they have to be controlled. Since 2002 the worldwide first commercial use of such a high speed train based on German technology is running successfully in Shanghai Pudong Airport, P.R.China. In this paper modeling of one...
Reported researches on semi-active suspension neglect the actuador dynamics, missing important information that can deteriorate the suspension's performance. The present research proposes a new semi-active suspension model with a magnetorheological damper, including its dynamics. Three control approaches are applied to this suspension model to improve passenger comfort and vehicle stability. The well...
This study discusses the rapid control prototyping approach used for development and investigation of control algorithm in magneto-rheological (MR) semi-active suspension system. Firstly, a multibody dynamic model based on MR suspension system is developed with the aid of VEDYNA software. Based on the model, a new intelligent control algorithm, human simulated intelligent control (HSIC) is proposed...
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