Theoretical analysis of a kind of hydraulic active filter

The concept of the hydraulic filter with active control was proposed. The theoretical analysis for a kind of active control hydraulic filter with static pressure balance and variable chamber derived by double accumulator-piezoelectric crystal was conducted and the mechanism of vibration attenuation was understood. The mathematical models for pump and loading were built to describe operating characteristics of the hydraulic system composed of pump, pipe line and loading, and the matching method between pump and loading was proposed. The selection method of the control law for achieving the desirable vibration absorption behavior was presented on the condition that the characteristics of hydraulic supply and loading were reasonably considered.