Study on Internal Model PID Control of Vehicle Active Suspension with Electro-hydrostatic Actuator
In order to relieve the influence of response time on dynamic performance of active suspension based on an electro-hydrostatic actuator (EHA),an internal model PID controller of EHA is designed.A dynamic mathematical model of EHA is established.Based on the first-order simplification of high-order model of EHA,an internal model controller is designed.Through the Taylor series first-order expansion of the internal model controller,a parameter expression of the PID controller is deduced and the PID parameters are obtained.An internal model PID control simulation model of EHA active suspension is built,and the simulation analysis is carried out.The results show that an internal model PID control can make output force of EHA actuator get better control in response time,and obviously improve dynamic performance of active suspension.
active suspensionelectro-hydrostatic actuatorinternal model PID controlTaylor series