本文分析了飞机平尾操纵系统动力学特性和飞机本体动力学特性闭环耦合情况下,由于平尾操纵系统质量分布不平衡引起的反馈增益对飞机纵向短周期模态特性的影响。文中给出了一算例,从计算结果看出:质量不平衡是影响飞机动态特性的一个重要因素,其极性不同,对模态特性的影响也就不同.在飞机设计中,应尽量减少其带来的不利影响。 In this paper, the influence of the feedback gain caused by the unbalanced mass distribution of horizontal tail control system on the longitudinal short-period modal characteristics of aircraft is analyzed under the condition of closed-loop coupling between the dynamics characteristics of aircraft tail-flight control system and the dynamics of aircraft body. An example is given in the paper. The results show that mass imbalance is an important factor that affects the dynamic characteristics of the aircraft, and its polarity is different and the impact on the modal characteristics is also different. In aircraft design, should be minimized Its adverse effects.