396 / 2022-02-11 08:31:32

Design of A Pseudo-Active Actuator with Semi-Active Actuators

Semi-Active Actuator; Pseudo-Active Actuator; Vibration Control; Four-Quadrant; Structural Design

The damping force and excitation of the semi-active suspension actuators are always in the same direction, i.e., the mechanical characteristics can only be adjusted in the first and third quadrants of the damping force-displacement* diagrams. Although semi-active suspension actuators have shown the advantages of low power consumption, simple structure, and high reliability, the system control performance is not as good as that of active actuators-based suspension systems. Based on the concept of “four-quadrant operation” of active actuators - motors, the configuration and principle of a pseudo-active actuator with four-quadrant controllable execution capability are presented in this paper. The pseudo-active actuator consists of two secondary semi-active damping actuators and one mechanical compensation mechanism to realize the adjustment characteristics of four-quadrant of damping force-velocity and damping force-displacement*. Based on the structure and principle of the pseudo-active actuator, the mechanical characteristics of the pseudo-active actuator are analyzed and tested based on a self-developed test bench.