{"title":"Vibration Suppression of Timoshenko Beams with Embedded Piezoelectrics Using POF","authors":"T. C. Manjunath, B. Bandyopadhyay","country":null,"institution":"","volume":15,"journal":"International Journal of Mechanical and Mechatronics Engineering","pagesStart":339,"pagesEnd":349,"ISSN":"1307-6892","URL":"https:\/\/publications.waset.org\/pdf\/14859","abstract":"This paper deals with the design of a periodic output\r\nfeedback controller for a flexible beam structure modeled with\r\nTimoshenko beam theory, Finite Element Method, State space\r\nmethods and embedded piezoelectrics concept. The first 3 modes are\r\nconsidered in modeling the beam. The main objective of this work is\r\nto control the vibrations of the beam when subjected to an external\r\nforce. Shear piezoelectric sensors and actuators are embedded into\r\nthe top and bottom layers of a flexible aluminum beam structure, thus\r\nmaking it intelligent and self-adaptive. The composite beam is\r\ndivided into 5 finite elements and the control actuator is placed at\r\nfinite element position 1, whereas the sensor is varied from position 2\r\nto 5, i.e., from the nearby fixed end to the free end. 4 state space\r\nSISO models are thus developed. Periodic Output Feedback (POF)\r\nControllers are designed for the 4 SISO models of the same plant to\r\ncontrol the flexural vibrations. The effect of placing the sensor at\r\ndifferent locations on the beam is observed and the performance of\r\nthe controller is evaluated for vibration control. Conclusions are\r\nfinally drawn.","references":null,"publisher":"World Academy of Science, Engineering and Technology","index":"Open Science Index 15, 2008"}