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A Method of Experimental Differential Constraint

A constraint point and least squares technique, applied in aircraft component testing, aircraft parts, ground installations, etc., can solve problems such as potential safety hazards in testing, small load at the constraint point, affecting the accuracy of loading at the loading point, etc., and achieve bidirectional constraints. Effect

Active Publication Date: 2016-08-17
CHINA AIRPLANT STRENGTH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] During the test, there are limitations to restricting the upward movement of the aircraft by hanging the counterweight. There will be an upward displacement, which will bring safety hazards to the test and affect the loading accuracy of the loading point

Method used

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  • A Method of Experimental Differential Constraint
  • A Method of Experimental Differential Constraint
  • A Method of Experimental Differential Constraint

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Experimental program
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Embodiment Construction

[0026] Below by embodiment the present invention will be further described:

[0027] In the test differential restraint method of the present invention, crowbars are used vertically to suspend the aircraft in the vertical direction of the front lift, left and right main landing gears, and at the same time, downward restraint equipment is installed at the three landing gears to ensure that the aircraft does not move upward during the test. . Connect the load sensor to the restraint device of the crowbar, obtain the measurement data through the experimental method, use the least square method to fit the calculation, and calculate the feedback from the sensor on one side of the crowbar to the other end, and accurately calculate the vertical constraint through the program control function of the control system The feedback of the point, so as to realize the real-time monitoring of the feedback of the constraint point in the test.

[0028] see figure 2 , which is a schematic dia...

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Abstract

The invention relates to a differential restraint technology, in particular to a restraint used for aircraft support in aircraft structure strength tests. The present invention vertically adopts crowbars to suspend the aircraft in the front, left and right main landing gears. The load sensor is connected to the restraint device, the measurement data is obtained through the experimental method, and the least square method is used to fit the calculation, and the feedback calculation of the sensor on one side of the crowbar is calculated to the other end, and the feedback of the vertical restraint point is accurately calculated through the program control function of the control system. Thus the real-time monitoring of the restraint point feedback in the test is realized.

Description

technical field [0001] The invention relates to a differential restraint technology, in particular to a restraint used for aircraft support in aircraft structure strength tests. Background technique [0002] In the aircraft structure test, the support scheme of the test piece is directly related to the test quality, safety and validity of test results. The full-aircraft test generally adopts the statically definite restraint form of the full-aircraft suspension, which is usually supported by the suspension of the landing gear, that is, the vertical restraint of the suspension support of the landing gear adopts the vertical joints of the front lift, left and right main landing gear, and the aircraft is suspended in the air through a crowbar. At the same time, the counterweight is hung on the lower part of the three landing gears, and the upward movement of the aircraft is limited by using the counterweight. For details, see figure 1 . [0003] During the test, there are lim...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B64F5/00B64F5/60
Inventor 宋鹏飞王征夏峰王刚郑龙刚李晓冬
Owner CHINA AIRPLANT STRENGTH RES INST