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Method for measuring motion parameter of large-size rotor wing

A technology of motion parameters and measurement methods, applied in the direction of measuring devices, instruments, optical devices, etc., can solve the problems of inconvenient installation location, low measurement accuracy, unclear imaging, etc., and achieve the effect of overcoming the loss of marking points

Inactive Publication Date: 2018-04-27
CHINA HELICOPTER RES & DEV INST
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Problems solved by technology

[0007] The purpose of the present invention is to provide a non-contact measurement method of large-scale rotor motion parameters based on motion attitude video measurement and dynamic characteristic analyzer, to overcome the existing technology or the measurement parameters are many, the structure is complex, or the imaging is not clear, Any problems such as low measurement accuracy or inconvenient installation position during measurement

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  • Method for measuring motion parameter of large-size rotor wing
  • Method for measuring motion parameter of large-size rotor wing
  • Method for measuring motion parameter of large-size rotor wing

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Embodiment Construction

[0027] In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below in conjunction with the drawings in the embodiments of the present invention.

[0028] Aiming at the deficiencies of the prior art, the invention proposes a large-scale rotor motion parameter measurement method based on a motion attitude video measurement and a dynamic characteristic analyzer. In the present invention, at first by using the calibrated motion posture video measurement and dynamic characteristic analyzer that contains multiple cameras to collect high-speed rotating large-size rotor blades under different azimuth angles, the motion track image data of the blades; then After calculation, the three-dimensional coordinates of the blade at different azimuth angles are reconstructed; finally, according to the definition of each motion parameter, the motion ...

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Abstract

The invention, which belongs to the technical field of test measurement of a helicopter, relates to a method for measuring a motion parameter of a large-size rotor wing. Motion track image data of a large-size rotor blade in high-speed rotation are collected at different azimuthal angles by a calibrated multi-camera motion attitude video measurement and dynamic characteristic analyzer; after calculation, three-dimensional coordinates of the rotor blade at different azimuthal angles are reconstructed; and then according to definitions of all motion parameters, all motion parameters of the bladeare calculated. According to the method provided by the invention, with the employed feature marking point generation plan and process, defects of marking point shedding, low image definition, and poor measuring effect and the like during the high-speed rotation of the large-size rotor blade are overcome. And the full-field strain of the large-size blade can be measured effectively; measurement becomes flexible; and on-line measurement of the motion parameter of the rotor blade is realized.

Description

technical field [0001] The invention belongs to the technical field of helicopter test and measurement, and in particular relates to a method for measuring large-scale rotor motion parameters. Background technique [0002] As an important component of the helicopter, the rotor provides the required lift and propulsion for the flight of the helicopter. The dynamic characteristics of the rotor blade directly affect the performance of the helicopter. Large-sized rotor blades (such as diameters greater than 20m) are subjected to huge aerodynamic and vibration loads during high-speed rotation; moreover, due to constraints such as materials, weight, and cost, large-sized rotor blades often need to adopt a flexible design, resulting in Larger size rotors will have greater elastic deformation than normal size rotors. However, there is no more accurate theoretical calculation model in the research and design process, which puts forward a more urgent demand for the measurement of la...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/24
CPCG01B11/24
Inventor 吴国宝易晖杨金花
Owner CHINA HELICOPTER RES & DEV INST
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