Multivariable limit protection control method for aero-engine

Abstract

The invention discloses a multivariable limit protection control method for an aero-engine. Aiming at the defects of an existing aero-engine limit protection control method, the method is based on a model-based control thought, a main control loop or a corresponding limit protection loop is selected and activated in real time through online linearization and parameter prediction of an airborne model, and instruction adaptive reconstruction under a multivariable framework is realized by utilizing a prediction result, so that a multivariable controller is used for realizing non-measurable directcontrol or limitation. The method is applicable to various power machines which can establish complex analytical models and have multiple adjustable variables, including but not limited to turbojet engines, turbofan engines, turboshaft engines, turboprop engines, variable-cycle engines, turbine-based ramjet combined engines and the like.

Description

technical field [0001] The invention relates to an aeroengine control method, in particular to an aeroengine multivariable limit protection control method. Background technique [0002] With the development of aero-engine technology, the amount of controllable adjustment it provides is increasing day by day, coupled with the continuous increase in the performance requirements and safety requirements of the engine during operation, the control system is developing from a single-variable control system to a multi-variable control system. . As far as the control task is concerned, the aero engine control system needs to control the engine to meet the requirements of the flight task, and at the same time ensure that it can work safely to avoid dangerous situations. The limit protection control function is introduced to meet the requirements of the latter, so as to ensure that the engine works within the set safety parameter range under extreme working conditions, that is, to en...

AI Technical Summary

Problems solved by technology

[0006] However, although model-based control makes it possible to directly limit the unmeasured, when applying multivariable control when the control signal calculated by a control loop contains multiple actuator signals, that is, the control signal is a vector rather than a single actuator signal

This makes it impossible to select the most suitable control loop output by simply comparing the size of the control signal in the vector form

This creates control loop selection difficulties when applying multivariable control to limit protection control

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