Abstract
A hybrid active and passive vibration control strategy is developed to reduce the total power flows from machines, subject to multiple excitations, to supporting flexible structures. The dynamic interactions between machines, controllers, and receiving structures are studied. A force feedback control process governed by a proportional control law is adopted to produce active control forces to cancel the transmitted forces in the mounts. Computational simulations of a simple and a multiple dimensional hybrid vibration isolation system are performed to study the force transmissibility and the total power flows from vibration sources through active and passive isolators to the supporting structures. The investigation focuses on the effects of a hybrid control approach to the reduction of power flow transmissions and the influence of the dynamic characteristics of the control on power flow spectra. The hybrid control mechanism is synthesised from the power flow analysis. Conclusions and control strategies, well supported by numerical simulations, are deduced providing very useful guidelines for hybrid vibration isolation design.
Highlights
It is well known that passive vibration isolation is a proven approach to reduce vibration transmission between vibration sources and receiving structures [4,6, 14]
Xiong et al / Hybrid active and passive control of vibratory power flow in flexible isolation system trade-offs of active-passive vibration isolation systems in which the optimal control problem was treated as a quadratic optimization with linear constraints to guarantee the global optimal solution of the hybrid isolation system
The main focus of the present paper is to investigate a hybrid active and passive energy control strategy from the viewpoint of power flow analysis examining the effects induced by a distributed receiver and by a multiple hybrid mounting system
Summary
It is well known that passive vibration isolation is a proven approach to reduce vibration transmission between vibration sources and receiving structures [4,6, 14]. Y.P. Xiong et al / Hybrid active and passive control of vibratory power flow in flexible isolation system trade-offs of active-passive vibration isolation systems in which the optimal control problem was treated as a quadratic optimization with linear constraints to guarantee the global optimal solution of the hybrid isolation system. Xiong and Song [17] studied an optimal control method applied to power flow to reduce vibration energy transmissions in multiple dimensional isolation systems. The main focus of the present paper is to investigate a hybrid active and passive energy control strategy from the viewpoint of power flow analysis examining the effects induced by a distributed receiver and by a multiple hybrid mounting system. Strategies to control the net power flow are proposed so as to achieve good isolation of the machinery and to control base vibrations
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