Test method for output characteristics of stacked piezoelectric ceramics under wide range of temperature changes

Abstract

A method for testing output characteristics of stacked piezoelectric ceramics under large-range temperature change is disclosed. The invention belongs to the field of wind tunnel model vibration active control based on a piezoelectric ceramic actuator and relates to the method for testing the output characteristics of a stacked piezoelectric ceramic actuator under the condition that the temperature changes in a large range. According to the method, an optical fiber displacement sensor, a pressure sensor and a stacked piezoelectric ceramic actuator are installed by using a test mechanism to form a whole test device, and then the test device is connected with a measurement and control system and a computer to form a whole test system. Certain pre-tightening force is applied to the stacked piezoelectric ceramic actuator by using the test device, data are obtained through the pressure sensor, the output strain of the piezoelectric ceramics is compared through the displacement sensor to obtain pressure, displacement and other information of the piezoelectric ceramics, the test device is placed in a high-low temperature environment testing box, and testing of the output characteristics of the piezoelectric ceramic actuator under the large-range temperature change condition is completed. The testing method is accurate and convenient and has high feasibility.

Description

technical field [0001] The invention belongs to the field of active control of wind tunnel model vibration based on piezoelectric ceramic actuators, and relates to a test method applicable to the output characteristics of stacked piezoelectric ceramic actuators under the condition of large-scale temperature changes. Background technique [0002] The wind tunnel model test aims to simulate complex flight conditions to obtain the aerodynamic characteristics of the aircraft, so as to provide data support for its aerodynamic performance evaluation, system manipulation and design. However, in the wind tunnel simulation test, the transonic wind tunnel model is fixed by means of struts and tail supports. When the aircraft model is in the test state of high angle of attack, there will be low-frequency and large-scale vibration due to air separation. A strut breaks and the wind tunnel is vulnerable to damage. Therefore, it is necessary to control the vibration of the wind tunnel mod...

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Problems solved by technology

[0004] At present, for the test of the output characteristics of the stacked piezoelectric ceramic actuator: Liu Yugang, Li Zhanjing and others of the Xi'an Flight Automatic Control Research Institute of the Aviation Industry Corporation of China, the patent number of "a piezoelectric ceramic sheet synchronous measurement device" For CN201820577952.3, its device provides a method that can realize the simultaneous measurement of the displacement and force of the piezoelectric ceramic sheet, wherein there are several displacement sensors, which are arranged around the measured piezoelectric ceramic sheet, which can improve the measurement accuracy, but does not consider the measured There is a displacement difference between the piezoelectric ceramic sheet and the displacement sensor, which affects the accuracy of the micron-level displacement change of the piezoelectric ceramic driver, so it cannot be applied to engineering and test systems

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