径向肋可展开天线动力学特性试验研究

研究包带预紧力和限位间隙对天线收拢发射状态动力学特性的影响。设计并加工径向肋可展开天线的简化模型并进行振动试验,试验控制的变量为包带预紧力和限位间隙的大小,考察结构的基频和响应与自变量的关系。试验证明,包带预紧力在正常范围内对天线的基频没有影响,增加预紧力可以小幅度降低结构响应。肋条与限位盘的间隙大小与肋条的一阶固有频率和响应大小无关,且随着振动量级增加,肋条的共振峰后移。

Experimental Study on Dynamic Characteristics of Radial Rib Deployable Antenna

This paper presents the structure and application of radial rib deployable antenna, and deals with the influence on dynamic characteristics, from the preload of the clamp band and the clearance between ribs and limiters. A simplified model is designed and machined for vibration tests, in which the preload and clearance are independent variables. Vibration tests are carried out to study the relationship between the natural frequency and response of the structure and independent variables. It shows that a preload within the normal range has no effect on the natural frequency of the antenna. Preload increasing can reduce the response value by a small amount. The natural frequency and response of ribs is independent of the clearance, and the increase on input magnitude moves the format of rib rearward.