Active Vibration Control With Modified Positive Position Feedback

作者：Mahmoodi S Nima^*; Ahmadian Mehdi

来源：Journal of Dynamic Systems Measurement and Control-Transactions of the ASME, 2009, 131(4): 041002.

DOI：10.1115/1.3089565

• active control
• vibration compensation
• positive position feedback
• first-order compensator
• second-order compensator

A novel active vibration control technique based on positive position feedback method is developed. This method, which is a modified version of positive position feedback, employs a first-order compensator that provides damping control and a second-order compensator for vibration suppression. In contrast, conventional positive position feedback uses a single second-order compensator The technique is useful for strain-based sensors and can be applied to piezoelectrically controlled systems. After introducing the concept of modified positive position feedback, this paper investigates the stability of the new method for locating gain limits. Stability, conditions art global and independent of the dynamical characteristics of the open-loop system. Using root locus plots, proper compensator frequency is identified and damping of the closed-loop system is studied. The performance of the modified positive position feedback for both stead-v-state and transient dynamic control is studied. The experimental and numerical results show that the proposed method is significantly more effective in controlling steady-state response and slightly advantageous for transient dynamics control, as compared with conventional positive position feedback. [DOI: 10.1115/1.3089565]

• 出版日期2009-7
• 单位Virginia Tech; 美国弗吉尼亚理工大学(Virginia Tech)