A Fault Reconfiguration Control Method for High Thrust Liquid Rocket

A fault reconstruction and liquid rocket technology, applied in general control systems, control/regulation systems, test/monitoring control systems, etc., can solve the problems of low realizability and reliability

Active Publication Date: 2017-11-07
CHINA ACAD OF LAUNCH VEHICLE TECH
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Problems solved by technology

[0006] The document "Study on Rocket Attitude Control and Fault Reconstruction" is based on the kinematic model of the rocket in the pitch, yaw, and roll channels, and adopts the method of gain planning self-adaptation and correction network to design the attitude controller, and introduces disturbance Compensation controller, engineering realizability and reliability are not high

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  • A Fault Reconfiguration Control Method for High Thrust Liquid Rocket
  • A Fault Reconfiguration Control Method for High Thrust Liquid Rocket
  • A Fault Reconfiguration Control Method for High Thrust Liquid Rocket

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Embodiment Construction

[0078] 1. Build a knowledge base

[0079] Before designing the fault reconstruction law, the first thing to consider is how to classify the possible faults of the rocket, that is, to build the knowledge base of the expert system. Divide the swingable engines into N groups according to the control relationship of each channel, on this basis, consider the fault reconstruction strategy in units of groups; then refine the fault units from groups to units, and analyze one or more engines Reconfiguration strategy in case of servo system failure; finally, the failure type of each engine is discussed in four cases (stuck failure, full bias failure, floating failure, loss of effectiveness failure). Summarize all possible failure situations according to a certain logic, and take a number for each situation, which constitutes the knowledge base of the expert system. The construction idea of ​​the knowledge base framework The construction diagram of the knowledge base framework is as fol...

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Abstract

The invention discloses a high thrust liquid rocket fault reconfiguration control method, which does a research on a fault reconfiguration strategy and a reconfiguration control technology of the high thrust liquid rocket during a booster ascending flight. Possible faults of the rocket are classified according to a logic sequence from a set to a unit to a fault type, a specialistic systematic knowledge base is built, and basic condition equations which need to be met for realizing fault reconfiguration are obtained through deduction; and a swing angle deviator when an engine works normally is acquired, and in view of each different fault condition, the swing angle deviator each time when a fault happens to the engine is detected; and finally, the basic condition equations which need to be met for realizing fault reconfiguration are used for calculating a specific form for a fault reconfiguration control law in each different fault condition. The rocket anti-fault ability is improved, and research on the high thrust liquid rocket is promoted.

Description

technical field [0001] The invention relates to a fault reconfiguration control method of a high-thrust liquid rocket, which is suitable for system reconfiguration and attitude control when the pitch channel engine fails when the high-thrust liquid rocket is flying in the boosting ascent section. Background technique [0002] High-thrust liquid launch vehicles need to use multiple engines, which makes the power system and control system more complex. It is necessary to conduct in-depth research on the rocket's redundancy capability and fault reconstruction strategy, and establish a fault adaptive control system. [0003] In order to improve the overall control performance of the rocket, it is necessary to optimize the engine layout scheme of the high-thrust launch vehicle, study the distribution scheme of the control force, and study the fault redundancy capability of the control system; In order to improve the adaptability to the system failure state, it is necessary to ana...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B23/02
CPCG05B23/0289
Inventor 李扬张普卓王俊峰焉宁张烽李烁高朝辉吴胜宝
Owner CHINA ACAD OF LAUNCH VEHICLE TECH
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