A Method of Dealing with Control Sensor Signal Fault Using Double Redundancy Control Law

Abstract

The invention discloses a method for processing a signal failure of a control sensor by using a dual-redundancy control rule, and is characterized by providing the method for processing the signal failure of the control sensor by using the dual-redundancy control rule, a dual-redundancy control rule design concept and a copy dual-redundancy control rule design principle, and a copy control rule design method and a design process of the dual-redundancy control rule. The main control rule is designed with the goal of enabling an aero-engine to obtain optimal thrust and economy in full flight envelope and ensuring the working stability and the structure strength of the engine; and the copy control rule design method provided by the invention is to perform the copy control rule design according to the copy control rule design principle on the basis that the main control rule design is finished. The method has the following advantages that the failure processing property of a digital control system is improved, the mission reliability of the aero-engine can be improved, the requirement of real-time control of the high-performance aero-engine is satisfied more easily, the method is more liable to implement, and the combination property of the aero-engine is improved.

Description

technical field [0001] The invention relates to the field of aeroengines containing digital electronic control systems, and in particular provides a method for processing control sensor signal failures by adopting a double-redundancy control rule. Background technique [0002] In order to improve reliability, the digital electronic control system of aero-engines has developed from non-fault-tolerant control to fault-tolerant control, that is, in the case of failure of some components, the system can still maintain the original performance index or the performance index is reduced (acceptable) , but can safely complete the control task. Fault-tolerant control includes redundancy technology and reconstruction technology. Redundancy technology is to design several control channels. When one control channel fails, another control channel will be put into operation. Redundancy techniques can be roughly divided into hardware redundancy and resolution redundancy. Hardware redund...

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Problems solved by technology

[0007] 3. Increase the sensor hardware redundancy to improve the reliability of the engine, which will increase the difficulty and workload of engine processing, assembly, production and maintenance, prolong the development and production cycle of the engine, and increase the production and use cost of the engine;

[0008] 4. Analytical margin method is used to improve the reliability of the engine. Due to the manufacturing tolerance and performance attenuation of the engine, there must be errors between the analytical margin sensor estimate calculated by the engine model and the actual value of the engine, which will cause the engine working state to vary during the fault handling process. The error of the control given value after the end of unstable and fault treatment;

[0009] Using the method of analytical redundancy to improve the reliability of the engine will bring about a substantial increase in the calculation volume of the engine electronic controller software, and further increase the requirements for real-time control of high-performance aero-engines, increasing the difficulty of control software design and the workload of coding

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