线性分析是控制律设计和操纵性稳定性检查的重要手段。为了实现线性分析，需要从飞机非线性模型中提取小扰动运动方程。本文介绍了小扰动理论，提出小扰动假设，根据假设得到一种线性化方法。将小扰动方程的时域响应与飞机运动学方程的时域响应进行对比，结果表明，线性化和非线性化的飞机迎角、速度和俯仰角曲线吻合很好，该线性化方法简单有效，并具有一定的工程设计指导作用。%Linearization analysis is an important method of control law design and controllability and stability check. In order to achieve linearization analysis, need to deduce small perturbation motion equation from non-linear model of airplane. In this paper, the small perturbation theory was introduced and small perturbation hypothesis was proposed. According to the hypothesis, a linearization technique was given. The time-domain response of small perturbation motion and kinematics equation was compared. The results show that linearization’s incidence, speed and pitch angle are good match with non-linearization, the linearization method is simple and effective, and has a certain guidance to engineering design.
展开▼
