A First-degree Fault Test Method for Three-redundancy Digital Servo System
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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
What is AI technical title?
AI technical title is built by PatSnap AI team. It summarizes the technical point description of the patent document.
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
CN106338983BActive 📅 Publication Date: 2018-12-21BEIJING RES INST OF PRECISE MECHATRONICS CONTROLS +1
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[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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