UTD based motion parameter resolving method of rotor wing of helicopter

Abstract

The invention provides an UTD based motion parameter resolving method of a rotor wing of a helicopter, and relates to the technical field of motion parameter measurement of rotor wings of helicopters.The method comprises the following steps: obtaining calculation parameters based on the relative position of an UTD sensor and paddles; then resolving swinging value based on the principle of trigonometry; obtaining a time interval of the j paddle and the j+1 paddle passing through the UTD through the UTD sensor; calculating an actual included angle of every two adjacent paddles based onthe time interval; and then calculating the swinging value. According to the method, the motion parameters of the rotor wing are measured through the optical sensor UTD, so that both work and power are saved, and moreover, the accuracy is improved; the measurement is automatically carried out, and even the operation is performed by one people; in addition, the measurement accuracy is not influenced by the level of an operator, the weather and the complexity of the helicopter.

Description

technical field [0001] The invention relates to the technical field of measuring helicopter rotor motion parameters, in particular to a UTD-based calculation method for helicopter rotor motion parameters. Background technique [0002] As an important component of a helicopter, the rotor provides lift and propulsion for the flight of the helicopter, and the dynamic characteristics of the rotor blades directly affect the performance of the helicopter. Due to the large structural size, large-size rotary rotors are subjected to huge aerodynamic and vibration loads during flight, and will produce greater elastic deformation than ordinary-size rotors, which puts forward a more urgent demand for the measurement of rotor motion parameters. The measurement and analysis of rotor motion parameters can provide reliable test data for the design of large-scale rotor systems; in addition, real-time measurement of blade flapping, shimmy and other motion parameters can also realize real-time...

AI Technical Summary

Problems solved by technology

[0004] (1) The strain measurement method has the advantages of mature technology, simple test equipment, and low cost. The disadvantage is that the static calibration process is complicated, and the consistency of the dynamic measurement and static calibration environments has the disadvantages of large images of the measurement results;

[0005] (2) The grating projection method has the advantage of using a small number of equipment and does not need to arrange a large number of strain gauges on the surface of the blade. It is a non-contact measurement method. The disadvantage is that there are high requirements for the accuracy of the test environment and the installation position of the grating projection. And the measurement results of the tip of the propeller are poor;

[0006] (3) The laser dynamic measurement method is also a non-contact measurement method. It has the advantages of high test accuracy, small volume and power consumption, and strong anti-interference ability. The disadvantage is that there are few measurable parameters and the trident structure affects the flight maneuverability. lack of influence

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