Simulation Research On Intelligent PID Control Based Vehicle Magneto-Rheological Seat Suspension

The seat is an important part influencing safety and riding comfort of the vehicle,especially off-highway vehicle such as agricultural vehicles,engineering vehicles,which work and travel on bad road.Because of the performance and cost limit of the suspension,passive suspension is used extensively.Vehicles vibrate seriously when working on bad road,which makes the drivers of these vehicles suffer from serious vibration of the seat which will significantly affect their health.In addition,as one part of the decreasing vibration of vehicle,the seat suspension is easily to improved. It is worth to research on high performance vihecle seat suspension because it is less studied in domestic.A semi-active seat suspension scheme is presented to reduce the vibration of the vehicle seat suspension and to increase the riding comfort of the people.The major content of this dissertation is as follows,First,mathematical model of magnetorheological damper is reaserched.Bingham and improved Bouc-Wen model of magnetorheological damper are simulated with MATLAB. According to frequency plot of simulation results,improved Bouc-Wen model is selected as semi-active seat suspension model.In addition,a human body-seat five-DOF model is presented applied to this system.At last,the simulation of the PID controll,improved single neuron PID controll,fuzzy PID cntroll and deadzone PID controll are done with MATLAB.Simulation results is effectively.The semi-active seat suspension scheme is controled by intelligent PID,and the simulation results is compared with between passive seat suspesion and semi-active seat suspension by MATLAB.Simulation reasults indicate that intelligent PID controll can effectively improve the antivibration effect of the seat,absorb the shock on driver,and improve enhance the riding comfortableness.