拖靶的垂向运动传递函数是设计拖靶高度控制系统的基础。由于拖靶系统的复杂性,难以直接从飞行动力学模型中求解传递函数。解决的方法是以拖靶为研究对象,通过受力分析,得到拖靶的垂向运动微分方程,再根据线性系统理论中的小扰动假设,就能够从静态出发,得到动态特性。在拖靶的设计阶段得到的传递函数,为拖靶高度控制系统的设计提供了定量分析的手段,对其设计工作意义重大。 The vertical motion transfer function of the drag target is the basis for designing the drag target height control system. Due to the complexity of the drag target system, it is difficult to solve the transfer function directly from the aerodynamic model. The solution is based on towing target. Through the force analysis, the vertical differential equations of dragging target can be obtained. Based on the small disturbance assumption in linear system theory, the dynamic behavior can be obtained from static state. The transfer function obtained during the design stage of the dragging target provides a quantitative analysis method for the design of the drag target height control system and is of great significance to its design work.