An error-sensor location Scheme in Active Vibration Isolation Based on Elastic Foundation

In this paper, the problem of error-sensor location in active vibration isolation of elastic foundation under complex excitation is considered. By analyzing the vibration transmission characteristics of rigid body foundation and elastic structure foundation, this paper explains the inconsistency of attenuation effect of single-channel vibration isolation system based on rigid body supported elastically at different positions, and points out that multi-channel isolation system can solve the inconsistency problem. For elastic structure foundation, the connecting part between isolator and foundation is regarded as rigid body structure. An error-sensor location scheme of three error sensors for a single isolator is designed based on the rigid body foundation experiments. The isolation effect is achieved by controlling the vibration of three error-sensors under the isolator simultaneously. Experimental results demonstrate that the proposed scheme has the advantage of control effect and control stability compared with the traditional single error-sensor scheme.