Fixed Points on Active and Passive Dynamics of Active Hydraulic Mounts with Oscillating Coil Actuator

Active hydraulic mounts with an inertia track, decoupler membrane, and oscillating coil actuator (AHM-IT-DM-OCAs) have been studied extensively due their compact structure large damping in the low-frequency band. This paper focuses on a comprehensive analysis of active passive dynamics fixed points mid-low-frequency bands, which will be helpful for parameter identification. A unified lumped mechanical model two degrees-of-freedom is established. The forces decoupler/actuator mover may neglected, nonlinear mathematical can obtained bands. Theoretical fluid-filled state reveals amplitude dependence point dynamic stiffness in-phase or real-frequency characteristics. local loss at fluid channel entrance outlet induces amplitude-dependent dynamics. constitute precondition points. single experimentally validated, pair AHM-IT-DM-OCA newly revealed experiment, presents new issue further analysis.