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Analysis of Curve Surface Fitting Algorithm Based on Curvatures for Space Sailboard Structure

ZHU Xiao-jin, ZHANG He-sheng, XIE Chun-ning, FAN Hong-chao (School of ElectroMechanical Engineering & Automation / Shanghai Key Laboratory of Power Station Automation Technology, Shanghai University, Shanghai 200072, China)  
Some large space flexible structures such as solar-sailboards must keep being a very high accurate pose when it is running in their orbit, so there is strict request to the vibration lever of the structure along with its control. It is significant to their efficient and active control if the vibration shape can be detected and reconstructed in Real-time. The experimental model is solar-sailboard structure, and distributed curvature information is detected by space-division multiplex technique and wavelength division multiplex technique through the embedded FBG sensor network. In order to apperceive the sailboard’s vibration shape and reconstruct its shape surface, the interpolation arithmetic of curvature and curved face fitting algorithm were discussed. On the basis of above, the experimental simulation was finished by using the computer software technique and computer image processing technique, and the fitting algorithm and its visual result was realized successfully. Simulation result indicates that the interpolation arithmetic and face fitting algorithm can accurately response the vibration shape of the sailboard which offers a visual model to active vibration control of spacecraft, and it provides good groundwork for the further research.
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