Three-steering-engine coaxial double-rotor system and control strategy thereof

Abstract

The invention discloses a three-steering-engine coaxial double-rotor system and a control strategy thereof, and belongs to the technical field of structures of helicopters. The system comprises an upper rotor wing power module, an upper rotor wing assembly, an upper synchronous inclination mechanism, a driving steering engine group assembly, a lower synchronous inclination mechanism, a lower rotorwing assembly, a lower rotor wing power module, an upper fixed main shaft and a lower fixed main shaft. An up-down synchronous pitch changing mechanism adjusts an upper-layer tilting tray for periodic pitch changing and total pitch increasing and decreasing control through driving control of the three steering engines, and a lower-layer tilting tray is synchronously driven by the upper-layer tilting tray to conduct periodic pitch changing and total pitch increasing and decreasing control. According to the variable-pitch mechanism and the control strategy thereof, double-layer periodic pitch changing and total pitch increasing and decreasing control are achieved. Compared with a disclosed single-layer periodic variable-pitch coaxial aircraft, the system has more sufficient control efficiency and higher wind resistance, and compared with a disclosed double-layer periodic variable-pitch coaxial aircraft, the system has fewer steering engines and a simpler structure, and the system reliability is effectively improved.

Description

technical field [0001] The invention relates to the field of coaxial dual-rotor aircraft, in particular to a coaxial dual-rotor system with three steering gears and a control strategy thereof. Background technique [0002] Since the coaxial dual-rotor aircraft does not need the balance torque provided by the tail rotor, the anti-torque of the upper and lower rotors balances each other. Compared with single-rotor helicopters and multi-rotor aircraft, it has a smaller volume and has a smaller storage volume. For multi-rotor aircraft, coaxial multi-rotor aircraft also has a high energy utilization rate, so it is increasingly occupying an important position in various application fields such as aerial photography, aerial surveillance, and load transportation. [0003] Although the coaxial dual-rotor aircraft has many advantages, the disclosed coaxial aircraft has insufficient flight control force and poor wind resistance due to the use of a simple single-layer periodic pitch ch...

AI Technical Summary

Problems solved by technology

[0003] Although the coaxial dual-rotor aircraft has many advantages, the disclosed coaxial aircraft has insufficient flight control force and poor wind resistance due to the use of a simple single-layer periodic pitch change mechanism.

Or other disclosed coaxial aircraft in order to obtain sufficient control force design is too complicated pitch-changing mechanism

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