A fault-tolerant control method for an aircraft electromechanical compound transmission system

Abstract

The invention discloses a fault-tolerant control method for an aircraft electromechanical composite transmission system. The fault-tolerant control method comprises the following steps of judging whether a fault main body is an engine, a first motor or a second motor; if the engine breaks down, adjusting the torque of the first motor and the torque of the second motor to control a planetary coupling mechanism to operate; if the second motor fails, adjusting the torque of the first motor to control the planetary coupling mechanism to operate; if the first motor fails, judging whether a third failure factor is 1 or not; if not, adjusting the torque of the second motor to control the planetary coupling mechanism to operate; and if yes, adjusting the torque of the second motor to control the planetary coupling mechanism to operate, braking the K2 rows of sun wheels, and increasing the total distance of the rotor wings. According to the present invention, the torque redistribution can be controlled, and the function or performance loss of the faulted actuator is compensated, and therefore the safety performance of an aircraft is guaranteed.

Description

technical field [0001] The invention relates to the technical field of aircraft flight control, in particular to a fault-tolerant control method for an aircraft electromechanical compound transmission system. Background technique [0002] At this stage, increasing the operating speed of aircraft is one of the important directions of aircraft development. At present, there are generally three ways to change the rotational speed of the rotor. One is to change the rotational speed of the aircraft engine according to the aircraft control system, and the rotational speed of the rotor changes when the rotational speed of the engine changes. The second is to change the rotational speed of the power turbine. The usual method is to adjust some geometric parameters of the engine, such as the angle of attack of the power turbine, so that the rotor speed can be changed without changing the working state of the engine. The third is to change the transmission ratio of the transmission sy...

AI Technical Summary

Problems solved by technology

[0004] In order to keep the engine speed basically constant and use the transmission system to change the speed, it is better to use electromechanical compound transmission. However, due to the electromechanical compound transmission system used in aircraft, once a fault occurs, the fault cannot be promptly and effectively eliminated. When it is diagnosed and treated, the aircraft will not be able to achieve its expected effect or even be in danger due to loss of control, resulting in irreparable losses

Moreover, the electromechanical compound transmission itself is a relatively complex system, which contains many components. The failure of each component will bring problems to the operation of the transmission system, and even some failures will make the transmission system dangerous during operation, but In the prior art, there is no control method for the electromechanical compound transmission system to ensure its safety and efficiency

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