Aircraft Stiffened Panel Structure Piezoelectric Master / Passive Control System

Piezoelectric material is a new type of functional materials and has its good electromechanical coupling characteristics, which show a huge advantage especially in the field of vibration control. Thus vibration control using piezoelectric materials has attracted a lot of research. In the thesis piezoelectric ceramic materials is used to control the structural vibration of stiffened panels on ARJ21 aircraft. Firstly, the location and size of piezoelectric elements were optimized. Secondly, there are two control methods in the research of vibration control: one is passive control of vibration; the other is Adaptive Control FX-LMS algorithm for active control theory. Finally, by dissipating the mechanical vibration energy and reducing the displacement amplitude of structural vibration, a good vibration damping was achieved.The third chapter of this thesis describes a preparing experiment, which implements two control methods on the vibration control of the aluminum-magnesium alloy plate. Just like the schedule stated in the third chapter, the model analysis of the structure, the optimization of location and size of piezoelectric patches and implementation of two control methods are carried out in order.This fourth chapter illustrates the schedule of the experiment of vibration control on the stiffened panels on the aircraft. Firstly, a model analysis of the whole structure (stiffened panels on the aircraft) is carried out. Based on the model analysis, the locations of maximum stress in different modes are established. Thus, the location and size of piezoelectric elements were optimized. Furthermore, active and passive control method are implemented in vibration control of stiffened panels on the aircraftThe fifth chapter of this thesis states the vibration control experiment on the stiffened panels on the aircraft, in accordance with the schedule stated in the fourth and the third chapter. The damping effects of single-mode and multi-mode are gotten with implementation of two control methods, respectively. Besides, when the damping effect is achieved, the magnitude of vibration displacement is not only reduced, the noise generated by the structural vibration also can be significantly weakened in comparison with without control.The final chapter briefly concludes the thesis by summarizing main results and exploring prospects for further work..