Abstract
Piezoelectric actuators are widely used in structural systems for active vibration control with the aim to enhance the performance of systems. The developed system of active vibration control consists of active structure, controller and high voltage amplifier. In this paper, the composite beam is host structure for sensor platform (strain gages) and actuator platform (dual layer PZT piezoelectric actuator). In order to improve the dynamic characteristics of active system, the coefficients of PID controller are changed. The effectiveness of active vibration control system at mode of interest can be improved with change of PID coefficients, but the stability of system can be reduced. The instability of the active structure is often perturbed by spillover effect. In this paper the importance of considering spillover effects in closed loop of piezoelectric active structures is demonstrated and shown the importance of change the PID coefficients in stability of active vibration control system. Experimental results which correspond to the developed active vibration control system are presented and affirmed stability on proposed active structure.
Highlights
Composite structures are widely applied in the aerospace and arms industry as well as in robotics, sports equipment and medical prosthetics
This paper presents an experimental investigation of spillover effect on smart beam active vibration control system affected by different coefficient gains of proportional–integral–differential controller (PID)
This paper describes a experimental investigation of spillover effect influence on developed active vibration control system
Summary
Composite structures are widely applied in the aerospace and arms industry as well as in robotics, sports equipment and medical prosthetics. The active vibration control of these structures is of great importance in enhancing safety and improving system performance, because the occurrence of unwanted vibrations may result in instability, decreased performance, and can lead to catastrophic failure [1]. In order to suppress vibrations during use, conventional structures have been combined with sensors and actuators to form so-called smart structures. The structure with sensor-actuator pair which is coordinated by a controller called smart structure. The performance and functionality of smart structures depend on control algorithm. The piezoelectric materials, such as lead zirconate titanate (PZT), are usually used for actuators. The materials have the property to generate electrical charge under mechanical load or deformation and the reverse; applying an electrical field to the material results in mechanical strains or stresses [2]
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