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A First-degree Fault Test Method for Three-redundancy Digital Servo System

A digital servo and fault test technology, applied in the field of aerospace servo system test, can solve problems such as complex control structure and various fault modes

Active Publication Date: 2018-12-21
BEIJING RES INST OF PRECISE MECHATRONICS CONTROLS +1
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

Due to the introduction of redundancy technology, the control architecture of the system becomes more complicated, and there are many failure modes
How to design the test, which can comprehensively assess the fault-tolerant function of the servo system redundancy design without causing product damage, has been lacking an effective method

Method used

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  • A First-degree Fault Test Method for Three-redundancy Digital Servo System
  • A First-degree Fault Test Method for Three-redundancy Digital Servo System
  • A First-degree Fault Test Method for Three-redundancy Digital Servo System

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Embodiment Construction

[0058] Such as Figure 1-2 As shown, a first-degree fault test method of a three-redundancy digital servo system, the three-redundancy digital servo system includes a three-redundancy servo controller and a three-redundancy servo mechanism, and the three-redundancy servo controller receives through a digital bus Control instruction, controlling the three-redundancy servo mechanism to act according to the control instruction, the three-redundancy servo mechanism includes an actuator, a three-redundancy servo valve for controlling the action of the actuator, and a three-redundancy servo controller for detecting and sending A three-redundancy displacement sensor that feeds back the displacement of the actuator. The three-redundancy servo valve is composed of three pre-stages, pre-stage I, pre-stage II, and pre-stage III, and one power stage four-way slide valve. A pre-stage drives the four-way slide valve of the power stage through a 2 / 3 voter; the three-redundancy displacement s...

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Abstract

The invention relates to a one-redundancy fault test method of a three-redundancy digital servo system, wherein the three-redundancy digital servo system comprises a three-redundancy servo controller and a three-redundancy servo mechanism, wherein the servo controller controls the action of the servo mechanism. The test method includes the following steps that: (A) all one-redundancy failure fault modes and physical fault causes are determined according to the control architecture of the servo system; B) the correctness of each one-redundancy failure fault tolerance function of the servo system is verified through adopting a simulation test method; and (C) if the correctness of each one-redundancy failure fault tolerance function passes verification, the one-redundancy fault tolerance function of the servo system is qualified, if any one one-redundancy failure fault tolerance function fails to pass the verification, a fault cause is found out, after a fault is eliminated, verification is carried out again until the correctness of each one-redundancy failure fault tolerance function passes verification. With the fault test method of the invention adopted, the fault tolerance function of the redundancy of the servo system can be verified comprehensively and effectively, and product damage can be avoided.

Description

technical field [0001] The invention relates to a test method for an aerospace servo system, in particular to a test method for a first-degree failure of a triple-redundancy digital servo system. Background technique [0002] The three-redundancy digital servo system is applied for the first time in my country's new generation launch vehicle. With the help of redundancy technology, the reliability of the servo system can be greatly improved. For the three-degree redundancy servo system, the system must have the fault tolerance capability of the first-degree failure, so the first-degree failure test is an important part of the product ground test. Due to the introduction of redundancy technology, the control architecture of the system becomes more complicated, and there are many failure modes. How to design a test that can comprehensively assess the fault-tolerant function of the redundancy design of the servo system without causing damage to the product has been lacking an ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B23/02
CPCG05B23/0213G05B2219/24065
Inventor 陈克勤赵迎鑫赵守军景光辉刘洪张晓莎
Owner BEIJING RES INST OF PRECISE MECHATRONICS CONTROLS
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