高速旋转机械转子支承系统的电液主动减振研究

Aiming at the requirements of the rotating machinery at high speed for state monitoring, fault diagnosis,and active control, a new type of squeeze-film-damper with electrohydraulic active control based on the hydraulic half bridge drived by piezo-electric-component(HSFD) is proposed. A mathematic model of describing the dynamic characteristics of the HSFD is established, the method to solve the pressure distribution is described. By means of the researches on the nonlinear behaviour of the HSFD, quasi-periodic motion and chaotic motion of the HSFD are delineated, and PD(proportional plus derivative) control law is used to stabilize the rotor system. The high frequency response DC supply for driving PZT and orifice with electrohydraulic active control are developed. The conclusions and the technique results are of important the theoretical significance and application value.

本课题提出一种可以实现转子支承系统振动主动控制的电液挤压油膜阻尼器。它由一个压力可控的挤压油膜阻尼器和四个采用压电晶体驱动的液压半桥组成。针对这种新型阻尼器，从理论建模、数字仿真和实验的角度研究其对转子支承系统动力学行为的主动控制。本课题的研究结果可为实现转子系统故障诊断与主动控制的整合奠定基础。