Smart structure vibration control using a new type of piezoelectric stack actuator (IWAE2008)
A novel Π(pi) shape piezoelectric stack actuator (PISA) is designed and applied to the vibration control of a cantilevered beam. This new actuator consists of a piezoelectric stack and a Π shape metal pedestal which are assembled together by a pre-compression bolt. The actuating forces come out of the expansion and contraction of the stack. The pedestal is designed to act as an external lever which will generate and translate the actuating moment acting on a structure. The pedestal makes PISA be a bending type actuator. Its flat bottom provides a bonding surface for PISA in vibration control applications. The actuation moment of PISA is derived and then it is used in a vibration control system of a cantilever beam. The positive position feedback (PPF) control and neural network predictive (NNP) control strategies are adopted to perform the first bending mode vibration control of the cantilever beam. Simulation results demonstrate that with the new actuator and the NNP control strategy, the amplitude of the first bending mode of the cantilever beam can be suppressed by more than 95%, while using PPF control strategy the amplitude can be reduced by about 60%. The results demonstrate that the proposed PISA can serve as a high efficiency piezoelectric actuator in vibration control.
Π(pi) shape piezoelectric stack actuator (PISA) Positive position feedback (PPF) control Neural network predictive(NNP)control
Wang Wei Yang Zhichun
School of Aeronautics, Northwestern Polytechnical University, Xian, 710072, PR China
国际会议
北京
英文
1-5
2008-10-23（万方平台首次上网日期，不代表论文的发表时间）