Bearing-less rotor ground resonance test method

A test method, bearingless technology, used in the testing of aircraft components, etc.

Active Publication Date: 2018-11-20
CHINA HELICOPTER RES & DEV INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention: in order to solve the above problems, the present invention proposes a bearingless rotor ground resonance test method, through periodic variable pitch excitation disturbance, check the complex coupling situation under each state of the test bench, and require that it should be stable and

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  • Bearing-less rotor ground resonance test method
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  • Bearing-less rotor ground resonance test method

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Embodiment Construction

[0035] 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. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of the invention. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention. Embodiments of the present invention will be described in detail below ...

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Abstract

The invention discloses a bearing-less rotor ground resonance test method, and belongs to the technical field of bearing-less rotor test. The method comprises the following steps: 1, firstly constructing a bearing-less rotor simulation model and a testbed simulation model, and assembling the two models to carry out ground resonance calculation analysis; 2, verifying equipment in a test system, checking test pieces, debugging each system of the testbed, arranging test points, mounting a sensor, mounting an acceleration sensor at a propeller hub center to measure acceleration speeds in a rotation surface in two directions, mounting an acceleration sensor on a rotor shaft to measure an acceleration speed of the rotor shaft, and providing an overload monitor; 3, releasing an excitation signalby a signal source, transferring the excitation signal to an auto-bank unit via an excitation system, and driving paddles to carry out periodic variable-distance movement by the auto-bank unit; and 4,responding a time history by test points, acquired in the excitation process, on a rotor hub, a flexible beam and the testbed, and processing and analyzing a coupling modal frequency and modal damping of the bearing-less rotor and the testbed, so as to judge whether a ground resonance stability margin exists or not.

Description

technical field [0001] The invention belongs to the technical field of bearingless rotor tests, and in particular relates to a ground resonance test method of a bearingless rotor. Background technique [0002] Bearingless rotor is currently the most advanced structure type of helicopter rotor, which uses composite material flexible beam to replace the horizontal hinge, vertical hinge and axial hinge of traditional articulated rotor hub. Compared with the articulated rotor hub, the flexible beam has higher rigidity and complex deformation, and the blade flapping, shimmy and pitch-changing motion coupling is stronger, so that the aeromechanical coupling dynamic stability of the helicopter with the bearingless rotor configuration is more difficult than that of the articulated or spherical rotor. The ground resonance problem of the flexible hub rotor is more complicated and more prominent. [0003] The ground resonance test of the bearingless rotor-mounted test rig is carried o...

Claims

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Application Information

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IPC IPC(8): B64F5/60
CPCB64F5/60
Inventor 朱艳凌爱民陈全龙
Owner CHINA HELICOPTER RES & DEV INST
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