Research On The Module Switch And Control Algorithm Of Intelligent Suspension

Suspension plays an important role in driving safety and riding comfort.Among them,the active suspension has the shackle that if the configuration is the same,the control characteristics must be the same,and its damping effect is usually only the comprehensive optimal;In addition,when the road condition changes,the vehicle owner’s demand for suspension performance will also change,and the traditional active suspension is difficult to meet this requirement.That is to say,the existing active suspension has poor adaptability to changing road conditions,so it is difficult to improve vehicle performance.Therefore,in order to meet the needs of vehicle owners for suspension performance under different road conditions,improve vehicle performance on different roads,and respect the owner’s right to choose,this paper designs an intelligent suspension system based on the energy feedback active suspension.The structure of the intelligent suspension system in this paper included the upper function module and module switching controller,as well as the bottom control algorithm.Among them,the function module was divided into energy feedback module and active control module,and the active control module was divided into comfort module,safety module and comprehensive module,these four modules corresponding to A-D road respectively.The upper controller adopted the single double threshold module switching strategy,and matched the function modules according to the road conditions;the lower controller adopted different algorithms to control the corresponding function modules,so as to improve the vehicle performance.For the energy feedback module,this paper calculateed the energy feedback power of the vehicle at different speeds on A-level road.It could be known that when the vehicle was driving at the speed of 10m/s,20m/s and 30m/s,the suspension recovery power also increased.Therefore,when the car owner was driving on A-level Road,the selection of energy feedback module had a certain significance for energy feedback.For the three functional modules of the active control module,different algorithms were used to design the bottom controller.The main purpose of the comfort module was to improve the ride comfort of the vehicle when driving on the B-class road.Therefore,the BP-PID control algorithm was used to design the comfort controller to improve the body acceleration.The simulation show that the comfort controller is greatly improved under different speeds The main purpose of the safety module is to improve the driving safety of the vehicle when driving on the C-class road.Therefore,the safety controller is designed by using the sliding mode control algorithm to suppress the dynamic displacement of the tire.The simulation results show that the safety controller greatly improves the tire grip and improves the driving safety In order to improve the riding comfort and driving safety of the car on the D-class Road,the comprehensive controller is designed by using LQG algorithm.The simulation results show that when the car owner selects the module,the comprehensive performance of the car is greatly improved and meets the needs of the car owner.