本文从飞行力学的一个基本问题,即飞行器稳定性与机动性的关系出发,按系统工程的观点,对在现代飞行器设计中具有重大作用的一个设计思想——放宽稳定性原理进行了探讨,给出了若干有实际意义的结论;同时也指出了传统飞行力学的某些局限性。最后,分别讨论了这一原理在不同类型飞行器设计中的应用。 This paper starts with the basic problem of flight mechanics, namely the relationship between aircraft stability and maneuverability, and from the viewpoint of system engineering, discusses a design principle of relaxing stability in modern aircraft design, Some conclusions of practical significance were made. Some limitations of traditional flight mechanics were also pointed out. Finally, the application of this principle in different types of aircraft design is discussed respectively.