Effectiveness of Active Vibration Control of a Flexible Beam using a Different Position of Strain Gage Sensors

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.