A New Airframe/Propulsion-Integrated Aerodynamic Testing Technology in Hypersonic Wind Tunnel

Li, Shichao; Liu, Zihao; Gao, Hongli; Lv, Jinzhou; Zhang, Xiaoqing

doi:10.1109/tim.2022.3162287

Cited by 5 publications

(2 citation statements)

References 16 publications

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“…Considerations of how to measure the drag force over a tested system in a wind tunnel are presented in [ 16 ], where the dimensions of the measuring unit are emphasized. Aiming for a small testing unit, a suspension force-measuring system (SFMS) is proposed in [ 17 ]. Results show a sensitivity of 0.25 mV/N for drag force measurements, but a long calibration process is required.…”

Section: Survey Of Instrumentation and Measurements Techniquesmentioning

confidence: 99%

A Simple Approach to Estimate the Drag Coefficients of a Submerged Floater

Hoffman

Nagar

Shachar

et al. 2023

Sensors

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The calculation of the drag force is a fundamental requirement in the design of any submerged system intended for marine exploration. The calculation can be performed by analytic analysis, numerical modeling, or by a direct calculation performed in a designated testing facility. However, for complex structures and especially those with a non-rigid design, the analytic and numerical analyses are not sufficiently accurate, while the direct calculation is a costly operation. In this paper, we propose a simple approach for how to calculate the drag coefficient in-situ. Aimed specifically at the complex case of elastic objects whose modeling via Computer-Aided Design (CAD) is challenging, our approach evaluates the relation between the object’s speed at steady-state and its mass to extract the drag coefficient in any desired direction, the hydro-static force, and, when relevant, also the thruster’s force. We demonstrate our approach for the special case of a highly complex elastic-shaped floater that profiles the water column. The analysis of two such floaters in two different sea environments shows accurate evaluation results and supports our claim for robustness. In particular, the simplicity of the approach makes it appealing for any arbitrary shaped object.

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Section: Survey Of Instrumentation and Measurements Techniquesmentioning

confidence: 99%

A Simple Approach to Estimate the Drag Coefficients of a Submerged Floater

Hoffman

Nagar

Shachar

et al. 2023

Sensors

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“…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. After long-term development and research, as well as experimental results, it has been shown that the strain balance force measurement technology has high measurement accuracy and can better meet the current force measurement needs [8][9][10]. However, with the continuous improvement of experimental requirements, the size of the model will increase, and the weight of the model will also increase.…”

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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The Robust Adaptive Controller for Hypersonic Flight Vehicle Based on ADRC and PSMC

Liu

et al. 2022

2022 China Automation Congress (CAC)

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A New Airframe/Propulsion-Integrated Aerodynamic Testing Technology in Hypersonic Wind Tunnel

Cited by 5 publications

References 16 publications

A Simple Approach to Estimate the Drag Coefficients of a Submerged Floater

A Simple Approach to Estimate the Drag Coefficients of a Submerged Floater

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

The Robust Adaptive Controller for Hypersonic Flight Vehicle Based on ADRC and PSMC

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