A servo actuator adapted to the installation mechanism of the built-in plate displacement sensor

Abstract

A servo actuator adapts to the installation mechanism of the built-in plate type displacement sensor, including angular contact ball bearings, first anti-rotation pins, resistance components, brush components, second anti-rotation pins, anti-friction rings, piston rods and locking nut; the angular contact ball bearings are installed back to back, and the brush assembly is installed between the two angular contact ball bearings; the brush wire of the brush assembly is in contact with the resistance assembly; part of the piston rod is installed in the actuator housing, and the other part passes through the two an angular contact ball bearing, and the lock nut is mounted on the piston rod; the first anti-rotation pin and the second anti-rotation pin connect the brush assembly and the actuator housing; the present invention, under the application condition of narrow space, will The combination of the installation structure of the split displacement sensor and the structure of the servo actuator not only meets the requirements of the aerospace servo system for compact space, but also realizes the reliable work of the built-in split plate displacement sensor, which greatly improves the performance of this type of electric feedback servo. Actuator reliability.

Description

technical field [0001] The invention relates to a mounting mechanism, in particular to a mounting mechanism for a servo actuator adapted to a built-in plate displacement sensor, which belongs to the field of aerospace servo systems. Background technique [0002] At present, the electric feedback servo actuator scheme is widely used in the series of aerospace vehicles; in recent years, with the continuous improvement of the reliability of electronic products, the application in aerospace missile weapons has become more and more extensive. The weapon servo system adopts the electric feedback servo actuator scheme. The electric feedback servo actuator is a servo actuator in which the servo valve is located in the forward channel of the control loop, the displacement sensor is located in the feedback channel, and the closed-loop position is realized through the internal algorithm of the servo controller. [0003] The electric feedback servo actuator is mainly composed of direct...

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Problems solved by technology

[0005] Due to the limitations of space, weight and volume, the installation structure of the brush structure can only adopt the cantilever structure, and the distance from the supporting point of the actuator is generally very large. When the product is undergoing vibration tests, its long cantilever structure makes the brush The vibration of the part is amplified, causing the brush assembly to move violently relative to the resistance assembly, causing the conductive plastic layer on the surface of the resistance assembly to be worn and damaged, making the output voltage linearity of the sensor out of tolerance until there is no voltage output, and the servo actuator due to closed loop The feedback loop is broken and the open loop moves to the limit position. When two products are installed on the engine nozzle loading platform at the same time, the worst case will cause the engine nozzle to exceed the swing range requirement and be damaged.

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