REPUBLIC OF SERBIA MINISTRY OF DEFENCE
MINISTRY OF DEFENCE Material Resources Sector Defensive Technologies Department
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Effectiveness of active vibration control of a flexible beam using a different position of strain gage sensors
MIROSLAV JOVANOVIĆ Technical Test Centre, Belgrade, mjovano@sbb.rs Aleksandar simonović University of Belgrade, Faculty of Mechanical Engineering, Belgrade, asimonovic@mas.bg.ac.rs NEBOJŠA LUKIĆ Technical Test Centre, Belgrade, nesaluca@ptt.rs NEMANJA ZORIĆ University of Belgrade, Faculty of Mechanical Engineering, Belgrade, nzoric@mas.bg.ac.rs Slobodan stupar University of Belgrade, Faculty of Mechanical Engineering, Belgrade, sstupar@mas.bg.ac.rs SLOBODAN ILIĆ Technical Test Centre, Belgrade, slobodan.ilić@vs.rs
Abstract: This paper presents experimental determination effectiveness of active vibration control system depending on sensor location. The active structure consists of an composite beam as the host structure, strain gages as the sensors and piezoceramic patch as the actuation element. The Wheatstone bridge, sensor platform, is used to measure the strain of mechanical system which represents the control signal in system. The active vibration control system is controlled by PID control strategy. Control algorithm was implemented on the PIC32MX440F256H microcontroller platform. For the experiment two locations for sensor platform are chosen. In order to determine the influence of piezoelectric ceramic actuator work on sensor (control) signal the tip deflection of beam is measured by high speed camera. The active vibration control system effectiveness of both sensor and actuator positions are considered. Experimental results demonstrate that the presented control method is effective for both locations but the stability of the system can be violated. Keywords: Active vibration control, PID controller, strain gages, PZT actuator, composite beam.
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