A multi-channel sensor-based system for inverting the deformation of variable curvature structures

doi:10.19936/j.cnki.2096-8000.20251028.002

Abstract

Abstract: The extensive application of carbon fiber composite materials has put forward higher demands on deformation monitoring technology. The current commonly used non-contact/contact deformation monitoring technologies are difficult to simultaneously meet the requirements of global deformation monitoring and real-time performance. Based on the Ko theory, this paper combines the working principle of strain sensors to construct a continuous bending deformation inversion theoretical framework. Through the spatial circular arc interpolation method, a visualization curve reflecting the deformation characteristics is obtained. In combination with the application requirements of the deformation inversion theory, a multi-channel sensor is developed. The sensor integrates 7 sensing units and an integrated plug-in gold finger interface. Each individual sensing unit has sensing performance comparable to commercial strain gauges. The measurement of circular rings with different geometric dimensions using the multi-channel sensor proves that the curvature radius error of the sensing results is less than 2.5%. Finally, the deformation inversion system is used to test the deformation states of the simulated wing trailing edge structure. The inversion results show a high degree of consistency with the actual deformation results.

Key words: deformation inversion method, resistive strain sensor, multi-channel sensor, morphing trailing edge, composite material deformation monitoring

CLC Number:

TB332

WANG Tianxiao, LI Xuyang, GUO Xiaogang. A multi-channel sensor-based system for inverting the deformation of variable curvature structures[J]. COMPOSITES SCIENCE AND ENGINEERING, 2025, 0(10): 6-12.

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