SMA驱动变体机翼后缘精确控制研究

对基于形状记忆合金(SMA)驱动器的变体机翼后缘结构进行了设计分析与精确控制研究。经过详细准确的计算分析,确定了SMA的规格和布局方案,然后在CATIA软件中建立实体模型并通过数控加工得到变体机翼后缘模型;设计了基于数字信号处理(DSP)的测控系统,采用分段控制和PID控制相结合的控制策略,分别对变体机翼后缘第三旋转关节结构和整体结构的偏转进行了精确控制实验,结果表明偏转角度最大误差小于4%,响应时间小于6.7 s,初步实现了变体后缘偏转的精确控制。

Research on the Precise Control of the Morphing Wing Trailing Edge Actuated by SMA

The trailing edge of morphing wing actuated by shape memory alloy(SMA) is designed and precisely controlled.After a detailed and accurate computational analysis to determine the SMA specifications and layout programs,a solid model is created in CATIA and the structures of the trailing edge of morphing wing are produced by the numerical control machining.Using the control strategy which combines Segmentation control and PID control,the DSP measurement and control system is designed.The controlling experiments of trailing edge structure are accomplished,including the third rotary joint structure and the overall structure.The results showed that the maximum deflection error is less than 4% and the response time is less than 6.7 seconds,the precise controlling of the morphing trailing edge is preliminary realized.