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Optical fiber arrangement and bridge-forming method for helicopter rotor composite load test

A helicopter rotor and composite load technology, applied in the direction of aircraft component testing, etc., can solve problems such as life limitation, and achieve the effects of small size, good economic benefits and long life.

Active Publication Date: 2018-05-29
CHINA HELICOPTER RES & DEV INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional resistance strain gauge measurement has great limitations in life and other aspects

Method used

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  • Optical fiber arrangement and bridge-forming method for helicopter rotor composite load test
  • Optical fiber arrangement and bridge-forming method for helicopter rotor composite load test
  • Optical fiber arrangement and bridge-forming method for helicopter rotor composite load test

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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] In the blade load detection process, the load monitoring requirements for the specific section of the blade are generally put forward for the airfoil shape and mass distribution of the helicopter blade, including the strain loads in the upward swing and shimmy directions of the blade. Determine the load monitoring surface and monitoring content of the rotor system, and put forward specific scope and requirements for the position and arrangement of the measuring optical fiber.

[0029] For above-mentioned requirements, the present invention provides a kind of helicopter rotor composite load test optical fiber arrangement and bridge assembly method, and it comprises:

[0030] 1) Fi...

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Abstract

The invention relates to an optical fiber arrangement and bridge-forming method for a helicopter rotor composite load test and belongs to the technical field of helicopter load measurement. Through the arrangement and bridge-forming method for measurement of the composite load of a blade through optical fibers, load measurement of the optical fibers on a rotary rotor is achieved. The optical fiberarrangement and bridge-forming method for the helicopter rotor composite load test can be directly applied to measurement of the helicopter rotor composite load, and compared with an original measurement mode, the optical fibers in the optical fiber arrangement and bridge-forming method are smaller in size, lower in cost and longer in service life, so that the consumable material cost, the test repair time and the influence of an original test piece on the appearance of parts such as the blade in helicopter rotor load measurement are reduced by a large margin.

Description

technical field [0001] The invention belongs to the technical field of helicopter load measurement, and in particular relates to a method for arranging optical fibers and forming bridges for composite load testing of helicopter rotors. Background technique [0002] The rotor system is the main source of lift and control force of the helicopter, and the blades and hub components in the rotor system are always in the working state of alternating loads due to the effect of aeroelastic coupling during flight. Therefore, in order to improve the safety of the helicopter, it is necessary to conduct real-time online measurement of the alternating loads acting on the rotor system, and to accumulate data for the life estimation of blades and hub components. [0003] When measuring the load and strain of helicopter blades, it is mainly to measure the strain in the direction of flapping and shimmy on the section. The schematic diagram of the load arrangement and bridge assembly of the ...

Claims

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Application Information

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IPC IPC(8): B64F5/60
CPCB64F5/60
Inventor 高建秀易晖王楠芬杨金花
Owner CHINA HELICOPTER RES & DEV INST
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