Helicopter nonlinear predictive control method and device for spin recovery

Abstract

The invention discloses a method for controlling non-linear prediction of a helicopter for spinning recovery. The method includes the following steps: after entering spinning, using a pre-trained helicopter requirement torque model to conduct real-time online prediction on current helicopter requirement torque; after entering the stage of spinning recovery, using a pre-trained engine dynamic parameter model to conduct real-time online prediction on current engine dynamic parameters, at the same time using online prediction results of the helicopter requirement torque model and the engine dynamic parameter model to resolve so as to reduce a difference between a helicopter requirement torque upon the connection of a clutch and a torque support provided by an engine, taking into consideration of rolling optimization of operation conditions for stability and safety of the engine, taking a first item of controlled variable sequence that is solved as the helicopter control variable that is currently input. The invention also discloses an apparatus for controlling non-linear prediction of the helicopter. According to the invention, the method and the apparatus can effectively shorten time delay at the stage of spinning recovery and reduce rotating speed transient downslide of helicopter rotors.

Description

technical field [0001] The invention relates to a helicopter control method, in particular to a helicopter nonlinear predictive control method and device for spin recovery. Background technique [0002] With the continuous advancement of aviation technology, the reliability of turboshaft engines equipped on helicopters has been continuously improved, but analysis of flight accidents shows that emergency situations caused by engine failures still account for 73% of flight accidents. Therefore, after the helicopter loses power, the helicopter rotor uses kinetic energy and potential energy to keep its own speed constant, and the driver uses the pulling force generated by it to control the helicopter to land at a safe speed, that is, the spin down process, which undoubtedly becomes an important measure to ensure the safety of the helicopter. , can greatly improve the pilot's survivability. The spin performance of the helicopter is an important indicator of the airworthiness of ...

AI Technical Summary

Problems solved by technology

[0006] However, the existing predictive control methods generally have the problem of time delay in the spin recovery phase of the helicopter and the problem of excessive transient drop of the rotor speed, which is not conducive to the safe and reliable operation of the helicopter.

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