A Multivariable PID Controller Design Algorithm for Active Suspensions

For the active suspension control system, selecting sprung mass velocity and suspension deflection as controller inputs and active force as controller output, this paper considers a multivariable PID controller design problem with pole configuration and H
∞
performance constraints. Transforming the PID control problem into a static output feedback control problem and using the coordinate transformation matrix optimization method, this paper develops an algorithm to design the parameters of the multivariable PID controller. Finally, MATLAB/Simulink is used to analyze the performance of this controller. Simulation results show that the multivariableH
∞
PID active suspension controller obtained by this design algorithm significantly enhances the vehicle ride comfort, while ensuring good handling stability and meeting the mechanical constraints of suspension.