The Research On Technology Of Vibration Initiative Control For Piezoelectricity Intelligence Laminate

With the piezoelectric constant development of smart materials,piezoelectric smart laminated plates active vibration control is receiving increasing attention.In this thesis, laminates of active vibration control algorithms,linear quadratic optimal control method based on traditional linear quadratic optimal control coefficient matrix to determine the right way-the experience of law,in accordance with the aim to optimize the energy system,the coefficient matrix to determine the right approach,in order to achieve optimal control system.Paste for the piezoelectric film layer on the surface of the plywood,the use of plate elements,the establishment of control by the piezoelectric film laminate finite element method.Linear piezoelectric equations and Hamilton principle,derived from Moses piezoelectric laminated plate finite element dynamic equation,and the piezoelectric sensors and actuators for the role of equation,and arrive at smart laminated piezoelectric plate for active vibration control system of the state equation.To linear quadratic optimal control theory for the control strategy,selection of the structure of control energy and control signals as the control objective function of energy and energy based on the principle of the objective function to determine the coefficient matrix of the right to study the active piezoelectric plate vibration control. Through the Matlab simulation results show that the use of energy principle to determine the structure of the objective function of energy and control signals to control the energy matrix of the right to be able to achieve more effective control structures to control vibration and reduce energy consumption purposes.At the same time,in the above-mentioned work on the basis of further discussion as the location and size of piezoelectric films to control the time required for the maximum control voltage,structural vibration energy and control the impact energy. Were simply supported on four plates and cantilever plate piezoelectric components to calculate the location of cloth-chip to optimize computing and vibration control,get some meaningful results,and revealed a number of issues require further study.In this paper,optimization and control studies for reference,the calculation results have a certain value engineering applications.