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为满足变体机翼蒙皮连续光滑以及大变形要求,提出了一种可主动变形的SMARC波纹型蒙皮结构,并制备了两种蒙皮实验样件,在不同环境温度下,进行了拉伸与驱动实验。拉伸实验结果表明SMARC样件拉伸变形性能优于不含SMA丝样件,但SMARC材料受温度影响较大,温度升高,结构刚度减小;驱动实验中,初始位移线性增加,当激励电流超过3.4A时,复合材料基体受热软化,导致位移呈非线性变化趋势。最后在实验基础上建立了一个以电流强度为输入参量,驱动位移为输出参量的RBF神经网络模型,其逼近曲线较为准确和贴近实际驱动特性,最大预测相对误差<6%,为智能蒙皮的主动控制研究提供了一定的理论及实验依据。
In order to meet the requirements of continuous smooth and large deformation of the modified wing skin, an SMARC corrugated skin structure which can be proactively deformed was proposed and two kinds of skinned experimental specimens were prepared. Under different ambient temperatures, Stretching and driving experiment. Tensile test results show that the tensile properties of SMARC samples are better than those without SMA wire samples. However, SMARC materials are greatly affected by temperature, temperature and structural stiffness. In the driving experiment, initial displacement linearly increases, When the current exceeds 3.4A, the composite matrix softens due to heat, resulting in a non-linear displacement trend. Finally, an RBF neural network model based on current intensity as input parameter and driving displacement as output parameter is established on the basis of experiments. The approximation curve is accurate and close to the actual driving characteristic. The maximum relative error of prediction is less than 6% Active control provides some theoretical and experimental evidence.