Automatic matching control method for variable propeller pitch rotorcraft accelerator propeller pitch

Abstract

The invention discloses an automatic matching control method for the variable propeller pitch rotorcraft accelerator propeller pitch. During height keeping flight, current rotation speed and total propeller pitch are obtained, and current estimated lift is obtained according to the measured relation; optimal rotation speed and torque relation under the current lift is obtained according to the calculated rotor rotation speed-lift and a rotor rotation speed-torque relation table, the optimal rotation speed is taken as a control target, amplitude of an accelerator is controlled by feeding back rotation speed difference, and the rotation speed slowly approaches the current optimal rotation speed; and the propeller pitch is adjusted through a height retaining device to adjust the lift, and the rotation speed is gradually adjusted to the optimal rotation speed-accelerator relation. Lift changes of a rotorcraft are achieved through a variable propeller pitch mechanism, and the relation between the accelerator and the propeller pitch can be automatically adjusted in real time without human intervention; and the accelerator propeller pitch is kept within a good and reasonable range, so that margin of a control system is increased, and the effect of maintaining the height keeping flight is improved. Accordingly, the maximum lift is obtained with the minimum engine output power, and the fuel utilization rate is increased.

Description

technical field [0001] The invention relates to the design field of a control system of a pitch-variable aircraft, in particular to an automatic control method for throttle pitch of a pitch-variable rotorcraft. Background technique [0002] With the current development of aircraft, the pitch control system has the advantages of fast response speed and light actuator design. People pay more and more attention to pitch-variable aircraft. From helicopters to variable-pitch multi-rotors, all kinds of pitch-variable aircraft have become the choice of aircraft design. [0003] Using an oil engine to drive the rotation of the pitch control system is a commonly used power configuration scheme. In the existing control methods, there is only an inventive design for optimizing the fuel consumption of the engine alone, and there is no complete set of mechanisms for pitch control aircraft. Optimization is carried out so that the overall design achieves the inventive design of reducing f...

AI Technical Summary

Problems solved by technology

[0003] Using an oil engine to drive the rotation of the pitch control system is a commonly used power configuration scheme. In the existing control methods, there is only an inventive design for optimizing the fuel consumption of the engine alone, and there is no complete set of mechanisms for pitch control aircraft. Optimized to make the overall design achieve the inventive design of reducing fuel consumption

Images