Method of failure diagnosis of coordinating steering and fault-tolerate controlling of aircraft

Abstract

The invention discloses a method of failure diagnosis of coordinating steering and fault-tolerate controlling of an aircraft. The method of the failure diagnosis of the coordinating steering and the fault-tolerate controlling of the aircraft carries out fault diagnosis of a model of the aircraft of no failure and a state combination index discriminant of the aircraft. When failure of the aircraft happens, the failure is classified at first, then aiming at the determined failure category, influences of all factors of the whole aircraft and flight dynamics characters are analyzed, then modeling a mutation system after the failure happens to obtain a new model description of the aircraft when the failure of the aircraft happens. Designing method of a fault-tolerate controller is that a designed controlling quantity enables output of a model without failures to meet a military requirement, and input control formed by the controlling quantity and inhuman additional controlling quantity when the failure of the aircraft happens enable output of the new model when the failure of the aircraft to be stable.

Description

technical field [0001] The invention relates to an aircraft fault diagnosis and fault-tolerant control design method, in particular to an aircraft coordinated turning fault diagnosis and fault-tolerant control method. Background technique [0002] Military aircraft is an important combat weapon, and civil aircraft is an important means of transportation. It plays an increasingly important role in national defense and people's daily life and work. The research on fault diagnosis of aircraft systems has become more and more important. More and more people pay more attention to it; fault diagnosis is extremely important for systems with high safety requirements, detecting system faults in time can make the self-repairing system reconstruct the control law in time, which can avoid system collapse and the resulting material losses and casualties. [0003] The fault detection and diagnosis technology dominated by analytic redundancy was first developed in the United States in the ...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the technical problem that the existing fault-tolerant control technology only adjusts the input coefficient of the aircraft, and does not consider the aerodynamic characteristics in the design, resulting in the given fault-tolerant control scheme being difficult to apply from the actual aircraft, the present invention provides an aircraft coordination Turning fault diagnosis and fault-tolerant control method, this method performs fault diagnosis according to the model and state combination index discriminant formula when the aircraft has no faults; when the aircraft fails, first classify the faults, and then analyze the aircraft parameters and flight dynamics according to the determined fault category Then re-model the catastrophic system after the fault occurs to obtain a new model description when the aircraft fails; the design method of the fault-tolerant controller is to design the control quantity so that the output of the fault-free model meets the military standard requirements, and the The control input when the aircraft fails, which is composed of the control quantity and the non-artificial additional control quantity caused by the aircraft failure, makes the new model output stable when the aircraft fails

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