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Six-dimensional parallel balance

A parallel and balance technology, used in measuring devices, instruments, aerodynamic tests, etc., can solve the problems of small working space, complex positive solutions, and singular shapes and positions. Effect

Inactive Publication Date: 2003-11-19
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

The deficiencies of the parallel mechanism include: complex positive solutions for the position, small working space, and singular shapes and positions. The present invention introduces the parallel mechanism into the wind tunnel test balance, which can avoid its shortcomings and make full use of the inherent advantages of the parallel mechanism, such as high rigidity and high precision. , to solve the problem of traditional wind tunnel balance

Method used

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Embodiment Construction

[0020] Depend on figure 1 As can be seen, the specific composition of the six-dimensional parallel balance of the present invention is that the upper platform 11 on which the main strut 12 is housed and the lower platform 7 placed on the wind tunnel wall 6 are connected to the upper and lower platforms through six equal-length connecting rods. The spherical hinges on the circumference of the platform are connected to form a space parallel closed-loop structure. Each connecting rod is formed by connecting an upper connecting rod 2 and a lower connecting rod 8 through a nut 3, and a force sensitive element 4 is fixed on each connecting rod. The force-sensing element 4 may be a piezoelectric ceramic force-sensing element, a capacitive force-sensing element, a rectangular strain-type force-sensing element, a circular strain-type force-sensing element, and the like. Tested model 1 (such as model aircraft etc.) is installed on the main pole 12 of upper platform 11. Use the force s...

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Abstract

The balance has the space-parallel closed loop structure formed by connecting up platform of main bearing rod and down platform set on wind-tunnel with ball-joint set on periphery of up and down platforms through connecting rod set on with force sensing element, of which the connecting rod is formed by connecting the up connecting rod and the down connecting rod with nuts.

Description

technical field [0001] The six-dimensional parallel balance of the invention belongs to the field of wind tunnel test force-torque sensor manufacturing, and particularly relates to a space six-dimensional force-torque parallel wind tunnel balance mechanism. Background technique [0002] The wind tunnel balance is the most important measuring device in the wind tunnel test. The world-renowned achievements in my country's aerospace industry are inseparable from the wind tunnel balance. The balances for wind tunnel force testing mainly include mechanical balances, strain balances, piezoelectric balances, magnetic suspension balances and various special balances. However, they cannot adapt to the pace of development of the aerospace industry, such as complex structure, long force transmission route, low precision, narrow bandwidth range, etc., which have unnecessarily restricted the model tests of models such as high speed, heavy load, and flutter. Dongtian balance still needs ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M9/06
Inventor 姚裕吴洪涛张召明
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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