Research On Acceleration Vector Control Method For Vehicle Lateral Motion

With the development of science and the popularization of automobiles in life,the safety and comfort of automobiles are the indicators that consumers particularly value,and they are the standards of competition among automobile manufacturers.In the competition,GVC technology is particularly prominent,which is named Acceleration Vector Control System.For example,when the vehicle turns into the corner,the vehicle is moderate.Because of the GVC,the passenger’s comfort will be optimized and it get rid of the disadvantage of inertia when turning.When the bend is out,the load moves backwards and the car accelerates the exit.The main research content of this paper is the design of the control algorithm of acceleration vector control system.This paper mainly focuses on the positive effect of the acceleration vector control system of the lateral movement of the car on the ride comfort during the turning process.First of all,in order to evaluate the comfort during the steering process of the car,I introduced the evaluation method of comfort in the ISO2631 standard,giving different degrees of ride comfort corresponding to different ranges of acceleration rms,and I analyze the coupling of longitudinal acceleration and lateral acceleration by theoretical knowledge and software simulation.Next,based on the understanding of the comfort evaluation method and the coupling of longitudinal and lateral acceleration,the longitudinal acceleration of the vehicle steering is planned in an open loop.System obtain the longitudinal acceleration expectation value by the open-loop longitudinal acceleration planning formula.Compared with the actual value,system output drive torque by the PID controller.Then I adjust the open-loop gain value and compare the comfort of different gain values in order that we can obtain the best open loop gain.The best open loop gain is 0.5.Finally,based on the vehicle dynamics,the dynamic model of the vehicle’s lateral motion is established.In order to reduce the lateral acceleration of the steering condition,the lateral acceleration rate controller is designed,and the lateral acceleration rate PID controller is constructed to plan the longitudinal acceleration.In the simulation,as the three parameters of the PID are continuously adjusted,as I observe the comfort curve.And one set of PID parameters with better control effect is obtained.