基于机电耦合理论的智能反射面天线形状最优控制

Optimum shape control of intelligent reflector antenna based on structural-electromagnetic coupling theory

为提高反射面天线电性能,基于机电耦合理论,以增益和第一副瓣为综合控制目标,建立智能反射面天线形状最优控制模型。模型考虑结构强度和作动器性态约束,将作动电压作为被控变量,通过机电耦合模型将电性能表示为作动电压的函数。以某7.3m反射面天线为研究对象,同时考虑自重与温度载荷,分别应用所提方法与传统形状最优控制方法进行控制,其中温度载荷由77个温度传感器实测获取。结果表明,基于机电耦合理论的形状最优控制模型在改善天线的电性能方面更加有效。

To improve the electromagnetic performance of the intelligent reflector antenna, an optimum shape control model is developed based on the structural-electromagnetic coupling theory, which takes the gain and first sideqode levels as a comprehensive objective function. The control model adopts the material strength and the active travel and the passive travel in length of actuators as constraint conditions, and active voltages as controlled variables, and the electromagnetic performance is expressed as a function of controlled voltages through the structural-electromagnetic coupling model. The proposed model and traditional optimum shape con trol model both are applied to a 7.3 m reflector antenna, in which the self-weight and solar radiation are consid ered with 77 temperature sensors to measure temperature. Result shows that the proposed control model is more efficient in improvinlz the electromagnetic performance.