环形天线结构点头模态的T‑S型模糊控制

T-S fuzzy control of nod mode of a hoop antenna structure

通过悬吊解耦实现环形天线结构的点头模态,再进行振动控制是一个亟待解决的技术瓶颈。本文研究了环形天线结构点头模态的T‑S型模糊振动控制。以一个柔性缩比模型作为悬吊对象,应用有限元分析得到固有频率和模态;模态分析表明,当模型侧向悬吊时,点头模态受到的影响较小。再以侧向悬吊的模型参数建立状态空间方程,根据模糊控制原理,确定T‑S型模糊控制规则,用线性输出函数代替复杂的清晰化过程,建立T‑S型模糊控制程序,进行振动主动控制研究。数值结果表明,在T‑S型模糊控制后,点头模态方向的响应大幅下降,达到了模态解耦后抑制振动的目的。

The nod mode of the hoop antenna structure is realized by suspension decoupling,and its vibration control is a technical bottleneck to be solved.In this paper,T-S fuzzy vibration control of nod mode of a hoop antenna structure is studied.A flexible scaled model is used as the suspension object,and the natural frequency and mode are obtained through finite element analysis.Modal analysis shows that the nodding mode is less affected when the model is suspended laterally.The state space equation is established based on the vibration parameters of the laterally placed model.According to the fuzzy control principle,the T-S fuzzy control rules are determined.When the linear output function is used to replace the complex clarity process,the T-S fuzzy control program is established.Consequently,the active vibration control is studied.The numerical results show that the response of nod mode direction decreases greatly after T-S fuzzy control,and the suppression target is realized after mode decoupling.