Experiment Research On Active And Passive Control Of Structure

The structure vibration can be seen everywhere , especially in space engineering, it is a problem that need to be paid too much attention on, as a result, the vibration control is a very important field in aircraft designing. Based on what discussed above, the study on the vibration characteristics and control methods of space engineering has become a too significant topic in aircraft dynamitic stabilization.Because various reason such as: Nonlinear, asymmetry of material, complexity of damping mechanism, and be hard to make certain of coupling, making a accurate calculating is subjected to restrictive. Modern experimental analytical technique makes up some shortage of FEA.Plate/shell structures are predominant types in aeronautic and astronautic fields. The paper adopts experimental method to study the vibration control of plate/shell structures. The main investigation contents as follows: First, create the model of the layered structure with dynamics method. By introducing shear deformation of viscoelastic layer to classical laminated theory, an improved laminated theory is developed in this paper, which can be used to build dynamic equations of hybrid damping structures. And then, the on-line vibration control system with MATLAB/XPC is designed. Then, vibration control experiments of plate and shell are carried out. The main content of the paper is experimental study. First, the natural frequency of plates and shells are identified respectively. Secondly, the passive control tests on plates are carried on, and then the phenomenon that the global restrictions damping layer can control higher order vibration perfectively is discovered; and then the plate active control are tested, higher order vibration is suppressed effectively; later the integrated passive and active vibration control put on trial, as a result, the integrated passive and active vibration of plates is able to be suppressed more effectively. At last, the single point thresh on a shell is tested, the vibration control result of piezoelectric actuator is perfectively.These conclusions are verified through the testing discussed, the result that...