Six-component optical fiber aerodynamic force measuring balance and outputting signal combining method

Abstract

The invention discloses a six-component optical fiber aerodynamic force measuring balance and an outputting signal combining method. The six-component optical fiber aerodynamic force measuring balancecomprises a model connecting end, a normal force / pitch moment / lateral force / yawing moment / rolling moment combined measuring element, an axial force measuring element, a strut and a support connectingend. Holes and grooves which are used for laying of optical fibers guided out by optical fiber strain gauges on the various measuring elements are formed in a structural body of the optical fiber aerodynamic force measuring balance, the problem that laying of lead-out lines of optical fiber strain gauges, particularly laying of lead-out lines of optical fiber strain gauges of axial force elements, is difficult can be solved effectively, requirements of six-component aerodynamic load measurement of an aerodynamic force test of a wind tunnel model of an aerospace craft are met, reasonable combination of output signals of the optical fiber strain gauges is adopted, interference among the various components of the optical fiber aerodynamic force measuring balance can be relieved or eliminatedeffectively, and six components of the optical fiber aerodynamic force measuring balance are measured independently.

Description

technical field [0001] The invention belongs to the technical field of aerospace force measurement tests, in particular to a wind tunnel test model aerodynamic measurement balance, in particular to a six-component aerodynamic measurement balance based on optical fiber strain sensing technology and an output signal combination method. Background technique [0002] Resistance strain balance is a kind of aerodynamic measurement balance widely used in model aerodynamic measurement tests in various wind tunnels at home and abroad. The technology has been quite mature so far, but there are still bottleneck problems such as serious temperature effects and resistance to electromagnetic interference. It restricts the further improvement of its measurement accuracy. Optical fiber aerodynamic measuring balance is a newly developed aerodynamic measuring balance in recent years. It installs optical fiber strain gauges on each measuring beam of the aerodynamic measuring balance as a sensi...

AI Technical Summary

Problems solved by technology

For the six-component fiber optic pneumatic measurement balance, the measurement of axial load must be considered, and there are more fiber optic strain gauges installed, and the laying of the fiber optic strain gauge lead-out wires is more difficult than that of the fiber optic pneumatic measurement balance with five components or less.

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