Proof of Concept for Testing Acceleration Compensation Force Balance Techniques in Short Duration Flows with a CEV Capsule

Smolinski, Gregory J.

doi:10.2514/6.2007-1010

Cited by 2 publications

(2 citation statements)

References 1 publication

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“…In wind tunnel test projects, force testing is one of the most basic test items, mainly measuring the magnitude, position, and direction of the load on the aircraft during the test process. However, due to the short operating time of the pulse wind tunnel (on the order of one hundred milliseconds), in order to obtain more accurate aerodynamic loads and the thrust generated by the engine, the entire force measurement system needs to have a high frequency response and fast response speed [4][5][6][7]. At present, pulse wind tunnel force testing mainly relies on traditional strain balance force measurement technology, which measures the strain of the balance structure when the model is subjected to load using a Wheatstone bridge to obtain the force state of the model.…”

Section: Introductionmentioning

confidence: 99%

Design Method of Three-Component Optic Fiber Balance Based on Fabry–Perot Displacement Sensor

Xu,

Yu,

Zhang

2023

Sensors

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This article proposes a new type of three-component optic fiber balance based on Fabry–Perot displacement measurement technology based on the structure of the pulse wind tunnel balance. This paper systematically introduces the force measurement principle and design process of a three-component optic fiber balance and conducts relevant simulation analysis and experimental verification. The simulation results show that the Fabry–Perot sensor can achieve significant sensitivity to cavity length changes, and when used in existing balance structures, sensitivity gains can be achieved by changing the probe height without the need to modify the original structure of the balance. Finally, the feasibility of the design method was verified through calibration experiments: the optic fiber balance has high sensitivity and good linearity compared to simulation sensitivity, the error is less than 6%, and the calibration accuracy of each component is better than 0.13%, which is better than the existing traditional strain balance (0.37%). The pulse wind tunnel force measurement test has a short test time and a large model mass, and the balance needs to have a large stiffness to meet the short-term force measurement requirements. The introduction of more sensitive optic fiber balance force measurement technology is expected to solve the contradiction between the stiffness and sensitivity of force measurement systems.

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Section: Introductionmentioning

confidence: 99%

Design Method of Three-Component Optic Fiber Balance Based on Fabry–Perot Displacement Sensor

Xu,

Yu,

Zhang

2023

Sensors

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“…Rear sting supports are the most commonly used support forms in shock tunnels. [17][18][19][20][21][22][23][24][25] However, the cantilever-beam type limits the frequency, so the mass of the model is limited to a few hundred grams and the length magnitude within the millimeter level. The mass of a full-scale aircraft model is close to 1000 kg.…”

Section: Introductionmentioning

confidence: 99%

Aerodynamic measurement of a large aircraft model in hypersonic flow

Meng¹,

Han²,

Zhang³

et al. 2017

Chinese Phys. B

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Accurate aerodynamic measurements in the hypersonic flow of large aircraft models in tunnels have practical significance, but pose a significant challenge. Novel aerodynamic force measurement methods have been proposed,but lack theoretical support. The forms of the force signals techniques for signal processing and calculation of aerodynamics are especially problematic. A theoretical study is conducted to investigate the dynamic properties based on models of the draw-rod system and slender rods. The results indicate that the inertia item can be neglected in the rod governing equation; further, the solutions show that the signals of each rod are a combination of aerodynamic signals (with a constant value) and sine signals, which can be verified by experimental shock tunnel results. Signal processing and aerodynamics calculation techniques are also found to be achievable via the flat part of the signals.

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Proof of Concept for Testing Acceleration Compensation Force Balance Techniques in Short Duration Flows with a CEV Capsule

Cited by 2 publications

References 1 publication

Design Method of Three-Component Optic Fiber Balance Based on Fabry–Perot Displacement Sensor

Design Method of Three-Component Optic Fiber Balance Based on Fabry–Perot Displacement Sensor

Aerodynamic measurement of a large aircraft model in hypersonic flow

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