Simulation Analysis Of Air Suspension System Based On Hybrid Control Strategy

Vehicle suspension is one of the most important criteria for evaluating the performance of automobiles.It can improve the driving safety and ride comfort.With the rapid development of the automotive electronics industry and intelligent algorithms,the requirements for automotive suspensions are becoming higher and higher.Passive suspensions and semi-active suspensions cannot fully meet their performance requirements.The air suspension in the active suspension can change the spring stiffness and damping coefficient in real time to adapt to different road conditions,so that the suspension is always in good working condition,which can improve the ride comfort of the car.Therefore,air suspension is the trend and development direction of automotive electronics industry research.Based on fuzzy control and PID control theory,this paper proposes a hybrid control strategy to simulate and analyze the performance of air suspension system.Firstly,in view of the shortcomings of fuzzy control dynamic quality and the unreasonable error of PID control,a hybrid control strategy is proposed.Then the design and simulation analysis of PID controller and fuzzy PID controller are carried out by using Matlab.The fuzzy PID is suspended.Performance in rack applications has increased by about 28%.Then,based on the shortcomings of fuzzycontrol and the large search space of genetic algorithm,the genetic algorithm is optimized by steady-state breeding idea and region search method,and the improved genetic algorithm is used to optimize the fuzzy controller to make the air suspension Performance has further improved by about 10%.Finally,the simulation comparison of passive suspension and air suspension is carried out under different control strategies of different road conditions.It can be concluded from the root mean square of the evaluation index that the air suspension can improve the ride comfort under the hybrid control strategy.This topic is based on the simulation analysis of the air suspension system under the hybrid control strategy.Through the simulation and simulation analysis of the air suspension system under three different control strategies,the optimized fuzzy PID control system outperforms the fuzzy PID.Control is superior to PID control and is superior to passive suspension system performance.The optimized fuzzy PID control in the air suspension makes it more smooth and has high driving stability,which is in line with the development direction of automotive electronics.