舰载卫星天线稳定工作平台俯仰轴伺服系统设计研究

为了实现军舰在海上航行时卫星天线平台的稳定工作，设计了俯仰轴伺服控制系统。主要采用脉宽调制式(PWM)功率放大装置和无刷直流力矩电机(BDCM)构成系统驱动装置。首先，通过稳态设计，确定系统各环节的数学模型；然后，以一个自由度为例，通过角度环和角速度环的双闭环动态设计实现系统的稳定工作；最后，利用MATLAB语言进行数字仿真。结果在理想状态和考虑非线性因素的情况下，超调量和跟随性能良好，能满足设计要求。在实际应用中，可以扩展到三个自由度，用于在船舶以及其他外界波动较大的场合，以实现工作平台的稳定。

STABLE PLATFORM FOR THE SATELLITE AERIALS ON THE GALLEY BASED ON A SERVO SYSTEM OF THE PITCHING AXIS

A servo system of the pitching axis to ensure the stability of the platform of the satellite aerials is designed when the gallery sails in the sea. The drivers of the system are mainly composed of PWM and BDCM. Firstly,the model structure of diverse segments through the stationary design is determined,then an example of one freedom is given.We realize the stability of the system through the design of the double closed loop including the angular velocity loop and angle loop, which is named dynamic design. Finally,the MATLAB is used to simulate the system. As a consequence, when the system is in the ideal condition or involves the nonlinear factor, both overshoot and following can meet the need of the system. In practical appliance, the system can be extended to three freedoms,and it can apply to crafts and the much fluctuating situation.