Title :
A control strategy using negative stiffness for active vibration isolation
Author :
Zhang, Tao ; Huang, Hongbiao ; Zhao, Fangfang ; Zhu, Jianqiang
Author_Institution :
Joint Lab. of High Power Laser Phys., Chinese Acad. of Sci., Shanghai
Abstract :
This paper review the passive vibration isolation system firstly, and point out the conflicts: different frequency band requires different damping ratio; different disturbance needs different supporting stiffness. By using negative stiffness mechanism, zero and infinite dynamic stiffness are obtained. To solve former conflicts, a system with anisotropic stiffness is described. And for a practical isolation system, static stiffness and dynamic stiffness can be designed separately. And high gain can be replaced by precision control strategy and a passive isolator and an active actuator are connected in parallel.
Keywords :
elastic constants; vibration isolation; active vibration isolation control; anisotropic stiffness; negative stiffness mechanism; precision control; Actuators; Control systems; Damping; Force control; Frequency; Isolation technology; Isolators; Springs; Systems engineering and theory; Vibration control;
Conference_Titel :
Nano/Micro Engineered and Molecular Systems, 2008. NEMS 2008. 3rd IEEE International Conference on
Conference_Location :
Sanya
Print_ISBN :
978-1-4244-1907-4
Electronic_ISBN :
978-1-4244-1908-1
DOI :
10.1109/NEMS.2008.4484428
