对于较大机组，由于厂用电更多，单台驱动电动机也更大，厂用电系统各组成部件应用时的协调配合需更多的系统设计工作。
For larger units, as the total auxiliary power becomes larger and the individual drive motors become larger, the coordinated application of system components requires more system design effort.
首先推导出了由两相永磁步进电动机驱动单址天线转动的动态方程，描述了系统存在的模型不确定性。
Firstly, the dynamic equation of SA antenna rotation driven by two-phase permanent magnetic stepper motor was derived. Then the structured model uncertainties were described.
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