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In this paper a hybrid Differential Evolution based Biogeography Based Optimization (DEBBO) which converge quickly rather than algorithms without hybridization has been proposed for the tuning of Fuzzy Logic Controller (FLC) applied to a Quarter Car (QC) model with the RMS value of body acceleration as the performance index. It has been proven that the proposed controller works better than the conventional...
This research estimates the minimum intervention distance needed for a vehicle to safely avoid an obstacle, while also preventing wheel lift and tire skid. The intervention strategy considered is an open-loop lane change avoidance trajectory. As the vehicle approaches the obstacle, it continually determines the available lane change maneuver, relying on predictions of the Zero-Moment Point (ZMP) metric...
In-wheel motor drive (IWMD) is currently a hot topic in electric vehicle research and development for its remarkable advantages. But the extra wheel mass from the motor worsens vehicle ride comfort and road holding. Motor vibration is another problem, which does harm to motor performance and service life. As a trial response to the above problems, a 1/4 car model is established for electrical vehicles...
Aimed at the particularity of the vehicles ride pulse input running test, based on the rigid ring tire model and effect road profile, the 4 DOF dynamics model of vehicles is set up. Using Visual C++ 6.0 as development platform, the digital simulation program was developed by Runge-Kutta method. Comparison between simulation result and test result indicates that there is a well consistency between...
Estimation of tire-road friction forces has an important role in anti-lock brake systems (ABS), as well as for vehicle stability control systems, and road condition monitoring systems. We investigate the use of a moving horizon observer for estimation of multiple friction model parameters as well as the longitudinal wheel slip state under typical ABS braking scenarios, using wheel speed measurement...
Vehicle is a complex uncertain system with parameter perturbations and external disturbances; these uncertainties will easily result in the loss of vehicle driving stability. Tire cornering stiffness is a key influencing factor on maneuverability of vehicle. In order to maintain driving stability in vehicle cornering, through regarding tire cornering stiffness and outer disturbances as bounded uncertain...
To design reliably the products transportation simulation experiment system based on multi-body dynamics theory, vibration theory and virtual prototyping, the transportation vehicle subsystem simulation models such as fore and rear suspension, tire, vehicle body and steering are built and the whole vehicle virtual model is assembled, through the application of multi-body dynamics software (ADAMS)...
In this paper, a six degree of freedom half body vehicle suspension system is developed. The neural network algorithm is used to control the suspension system. With the aid of software Matlab/Simulink, the simulation model is achieved. With changing of neural network coefficients, such as changing of training epoch and changing of the network structure, a lot of simulation work is done. Simulation...
In this paper, we propose a yaw moment control based on fuzzy-logic controller to enhance the vehicle stability. A two-degree-of-freedom nonlinear model of the considered vehicle is briefly presented. The feedback of the yaw rate and sideslip angle are regarded as inputs of the controller. The developed controller generates the suitable steering angle so that the vehicle follows the target values...
An active suspension system for vehicles using the genetic algorithms and neural network controls strategy is presented. A half car four degree of freedom suspension vibration model is described. Compared with the conventional passive suspension system, the analysis is done to the system control performance. The analysis of the system response is obtained through the change of the neural network training...
In order to research the anti-slip regulation (ASR) of electric vehicle(EV), this paper analyzes the operating principle and control strategy of electric vehicle's ASR, builds the motion model of the EV and vehicle dynamics model including the tyre, the wheel and the model between the tyre and the road. The traditional ASR structure is complex. In order to solve the problem, a novel anti-slip controller...
This paper presents simulation of integrated controller of vehicle anti-lock braking system, which consists of the traditional continuous PID and finite state machine theory. Based on the integrated controller, slip ratio and deceleration are selected as the main control parameters to optimize ABS. Vehicle speed, wheel speed, braking distance, pressure state and slip ratio are investigate to reveal...
The paper is concerned with an active suspension system for vehicles using a LQG control. The model created here is described by a linear system with four degrees of freedom, subject to random excitation from road surface. The control is determined from the view-point of ride comfort, minimizing a given perform index. The simulation results indicate that the proposed active suspension system performs...
Slip arises during the acceleration of the automobile. As the result, the travel performance leads to an adverse effect because the grip force of the tyre on the road surface is lost. In this paper, we report the drive control system of an automobile by quadratic stabilization for the system, which considers the friction coefficient between the road surface and the tyre as an uncertainty in the controlled...
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