作者：
Jyh-Feng LinJwusheng HuDept. of Electrical and Control Engineering
National Chiao Tung Ulniversity Hsinchu Taiwan. Jhy-Feng Lin received the B.S. degree from the Department of Mechanical Engineering
National Taiwan University Taiwan in 1984 and the M.S. degree from the Institute of Aeronautics and Astronautics National Cheng Kung University Taiwan in 1986. He is currently working toward the Ph.D. degree at the Department of Electrical and Control Engineering National Chiao-Tung University Taiwan. Jwu-Sheng Hu received the B.S. degree from the Department of Mechainical Engineering
National Taiwan University Taiwan in 1984 and the M.S. and Ph.D. degrees from the Department of Mechanical Engineering University of California at Berkeley in 1988 and 1990 respectively. He is currently a professor in the Department of Electrical and Control Engineering National Chiao-Tung University Taiwan. His current reserarch interests include active noise control software engineering for realtime control and applications of digital signal processors.
A study of active vibration control of axially moving string-like system is presented in this paper. The approach is based on the concept of wave absorption or impedance matching through placement of both sensors and ...
详细信息
A study of active vibration control of axially moving string-like system is presented in this paper. The approach is based on the concept of wave absorption or impedance matching through placement of both sensors and actuators in domain. A classical model-matching framework for disturbance rejection is used to solve the control laws. For SISO cases, perfect wave absorption can be achieved if one of the boundary conditions is known. Further, by moving both the sensor and actuator to the boundary, the in-domain control laws become the boundary controllers derived by previous researchers. To avoid the requirement of knowing the boundary condition precisely, a two-sensor control law is then proposed. The resulting controller, though boundary independent, contains an infinite number of poles on the imaginary axis, and the closed-loop system is not internally stable. A simple “notch filter” is added to the control law, and the stability of as well as deterioration in performance are analyzed. Numerical results for a moving string system under external excitation are presented to demonstrate the effectiveness of this controller.
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