Actuator universal joint servo durability test device

Abstract

The invention discloses a servo durability test device for a universal joint of an actuator, aiming at providing a durability test device with controllable loading force and capable of accurately simulating the working conditions of the actuator. The present invention is realized through the following technical solutions: the α-angle rotation servo motor is connected to the α and β angle rotation fixtures through the installation shafts of the α and β angle rotation fixtures, and the α and β angle rotation servo motors have a mutually vertical coupling structure in space. The servo motor rotates according to the target deflection angle given by the α and β angle rotary encoders, and the servo motor is controlled by the PID algorithm to control the deflection angles of the universal joints in the α and β directions. Perform angular deflection, follow the displacement of the piston rod to change the rotation angle, and generate a non-linear trajectory angle. The two encoders perform curve fitting according to numerical analysis Newton interpolation to realize the corresponding functional relationship between the input piston rod displacement and the output rotation angle offset. Complete the durability test of the displacement change process of the piston rod.

Description

technical field [0001] The invention relates to a test device for the rotation angle of the universal joint deflecting the non-linear trajectory angle along with the extension displacement of the piston rod during the durability test of the universal joint of the actuating cylinder. Background technique [0002] The actuator is a hydraulic actuator that converts hydraulic energy into mechanical energy. In the aircraft hydraulic system, the actuator is distributed in various parts. Therefore, the stability and reliability of the actuator play an important role in the performance and safety of the aircraft. Crucial role. The universal joint of the actuator is a movement mechanism that can change the direction of movement of the actuator. The universal joint is fixed, and the actuator can move in any direction through the superposition of two mutually perpendicular corners of the universal joint. Therefore, the reliability of the universal joint directly affects the overall pe...

AI Technical Summary

Problems solved by technology

The loading system of the traditional universal joint test system is a hydraulic cylinder. Through mechanical position adjustment, the extension and retraction meet the requirements of the deflection angle, and the position is controlled by a mechanical limit mechanism. The disadvantage of this method is that it can only achieve a single angle. Universal joint deflection test, the second is that different products correspond to different angles and need to readjust the position and direction of the loading cylinder, the installation and debugging process is extremely cumbersome

Fourth, the loading force is uncontrollable during the loading process, which is easy to damage the product

Fifth, the entire rotation process is uncontrollable, which cannot satisfy the movement of the universal joint with the displacement of the product piston rod during the loading process.

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