Active Sampled-data Controlled Suspension in Automobile with Vibration Manipulation Functions

Abstract

The intermittent feedforward function, termed vibration manipulation function (VMF), was proposed for sampled-data control of an actuator to achieve active suspension of an automobile with road profile undulation. The function can manipulate the position and velocity of a sprung mass of a 1DOF quarter car model in every arbitral operational period. Elongation or force of the actuator can be determined from VMF, which works to suppress vibration of the sprung mass without knowing road profile. Since required power of the actuator can be made smaller and intermittently-feedbacked feedforward control is much easier to be realized, proposed method could provide an alternative guiding principle for active suspension of automobile.