引言控制推力向量或舵面的机构是火箭中最重要的元件之一。这种装置不仅应该满足相当高的动态要求,而且应具有高的可靠性。火箭设计师一般喜欢采用液压舵面传动装置,这是由于它们具有高的动态特性,重量比较轻;尺寸小。但是液压舵机对堵塞很敏感及其他一系列因素,还不能达到所要求的可靠性水平。作为火箭舵面控制系统的执行机构, Introduction The mechanism that controls the thrust vector or rudder is one of the most important components of a rocket. Such a device should not only meet very high dynamic requirements, but also have high reliability. Rocket designers generally prefer to use hydraulic rudder actuators due to their high dynamic characteristics, low weight and small size. However, the hydraulic steering gear is very sensitive to jamming and a host of other factors that still do not meet the required level of reliability. As rocket surface control system of the implementing agencies,