Design method of fault response generator for testbed of liquid propellant rocket engine

Abstract

The invention discloses a design method of a fault response generator for a testbed of a liquid propellant rocket engine. The design method comprises following steps of: firstly, evaluating fault degree of historical test data of the liquid propellant rocket engine in order to obtain fault diagnosis information, fault predication information and fault level; secondly, gathering fault level of an overall testing stage in order to obtain a level curve of fault level and setting up a fault level library; thirdly, setting up mappings of fault diagnosis information, fault predication information and the fault level library and obtaining a fault response decision model according to the fact that all levels of the fault level curve in the fault level library respectively correspond to maintenance levels obtained by historical maintenance conditions; and fourth, linking different fault intervention and control measures to different maintenance levels in order to finish the design of the fault response generator for the testbed of the liquid propellant rocket engine. The design method of the fault response generator for the testbed of the liquid propellant rocket engine has following beneficial effects: a maintenance scheme can be made in advance for solving different faults and symptoms in order to decrease maintenance blind spots; and service lifetime and reliability of a testing system can be prolonged and improved.

Description

technical field [0001] The invention relates to the technical field of aerospace fault diagnosis, in particular to a design method for a fault response generator of a liquid rocket engine test bench. Background technique [0002] At present, there are many researches on rocket engine fault diagnosis at home and abroad, but in terms of engine maintenance, the current methods are regular inspection, pre-test inspection and post-fault maintenance. Periodic maintenance is to carry out periodic maintenance and precision calibration according to the reliability index of each component of the system; however, there is nothing to do about the failures that occur during the maintenance period, and it is difficult to accurately locate the location and cause of the failure. The inspection before the test is to carry out the debugging and performance inspection of the key components, sub-systems and the whole system before the engine works, and test whether the work of each link is norm...

AI Technical Summary

Problems solved by technology

However, in practical applications, the response methods to different degrees of faults and their early symptoms are not uniform, and the control decisions after faults mostly rely on experience to determine the scope of control intervention and the maintenance level or maintenance interval of each component. There is a phenomenon that the task deviates from the actual maintenance needs of the test bench

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