Control method and control device for variable rotor rotating speed helicopter

Abstract

The invention discloses a control method of a variable rotor rotating speed helicopter. The variable rotor rotating speed helicopter is provided with a continuous stepless speed change transmission mechanism and a turboshaft engine with variable power turbine rotating speed. The control method comprises steps, firstly, calculating the required power of the helicopter according to the atmospheric environment, the forward flight speed and the rotor speed; calculating engine performance parameters of the turboshaft engine under the condition of a certain power turbine rotating speed according tothe helicopter required power; and finally, taking the engine performance parameters as initial guessing values, and taking variable speed distribution factors as optimization variables, carrying outoptimization solution on a helicopter / engine comprehensive system performance calculation model of the variable rotor rotating speed helicopter, and controlling the continuous stepless speed change transmission mechanism and the power turbine according to the solved optimal variable speed distribution factors. The invention further discloses a control device of the variable rotor rotating speed helicopter. The optimal rotor rotating speed and the optimal power turbine rotating speed can be obtained at the same time, and the comprehensive performance of a helicopter / engine system is remarkablyimproved.

Description

technical field [0001] The invention relates to a control method for a helicopter, in particular to a control method for a helicopter with variable rotor speed, and belongs to the technical field of system control, optimization and simulation in aerospace propulsion theory and engineering. Background technique [0002] In recent years, the requirements for reducing engine exhaust emissions and fuel consumption have become higher and higher [Goulos I, Pachidis V, Dippolito R, et al. An Integrated Approach for the Multidisciplinary Design of Optimum Rotorcraft Operations [J]]. For helicopters, the use of variable rotor speed technology can effectively reduce the fuel consumption and exhaust emissions of turboshaft engines. However, considering that a specific rotor speed may excite the natural frequencies of the airframe components and that the efficiency of the engine is optimized over a relatively narrow speed range, modern turboshaft engines basically operate around a const...

AI Technical Summary

Problems solved by technology

The above research results either only study the feasibility of using variable turbine speed or variable transmission ratio to realize variable rotor speed, or only study the influence of variable rotor speed on the dynamic response of the turboshaft engine, but do not reveal from the perspective of reducing engine fuel consumption. Variation Law of Optimal Rotor Speed ​​or Power Turbine Speed

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