Control method and control system of unmanned helicopter engine constant rotation speed

Abstract

The invention provides a control method and control system of unmanned helicopter engine constant rotation speed. The method comprises the steps of detecting the average rotation speed and instantaneous rotation speed of an engine; adjusting the opening of a throttle plate according to the difference value of the average rotation speed of the engine and the target rotation speed of the engine and the current flying state information of an unmanned helicopter engine; determining the fuel injection quantity and fuel injection time according to the adjusted throttle plate opening and the state information of the engine; correcting the fuel injection quantity and fuel injection time or gas supplementation quantity according to the instantaneous rotation speed of the engine; and controlling fuel injection according to the corrected fuel injection quantity and fuel injection time, and controlling gas supplementation according to the gas supplementation quantity. According to the control method and the control system, the stability of the rotation speed of the engine can be improved, additional cost is not required to be added, the calculation amount is low, and the response speed of the system is high.

Description

technical field [0001] The invention relates to the field of aviation technology, in particular to a method and a control system for controlling the fixed speed of an unmanned helicopter engine. Background technique [0002] Helicopter rotors usually work at a constant speed. At present, the unmanned helicopter engine uses an engine or a carburetor engine with an ECU (Electronic Control Unit, electronic control unit), and completes the constant speed control of the engine by adding a constant speed controller in the flight control system. Usually, the engine controls the rotor speed by adding a sensor at the engine or the rotor, and obtains the rotor or engine speed by measurement means, thereby adjusting the throttle position to make the rotor speed constant. [0003] At present, the relevant unmanned helicopter engine constant speed control methods mainly include: [0004] (1) The helicopter rotor reaches a constant speed state by simply adjusting the throttle position, ...

AI Technical Summary

Problems solved by technology

This calibration method has a large workload, and the control system is sensitive to the calibration value, and its robustness is poor

[0005] (2) Control by using the rotor speed, because the rotor speed is lower than the engine speed, a large error will be generated in the control process

[0006] (3) During the flight of the helicopter, the engine always maintains a high-speed working state (which is completely different from the constant-speed cruise / motorcycle idling constant-speed working conditions), and the current single average speed feedback method cannot meet the speed fluctuations under high-speed conditions small needs

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