天线扫描系统采用主从式双计算机结构及零位检测装置，提高扫描精度；
The scanning accuracy is improved by adopting structures of master slave computer and zero detecting.
介绍了反电动势过零位置检测的原理及实现方法，并采用了数字式转速、电流双闭环控制。
One kind of sensorless control system for brushless DC motor based on DSP was introduced and the principle of back-EMF zero-crossing detection and realization method was discussed in detail.
提出了一种舰载武器系统零位一致性检测的新方法，从理论上分析了该方法的原理。采用该方法，可以实现全天候联调检测。
A new method of the zero collimation of the warship weapon systems is studied. The principle of this method is analyzed. This method can be used day and night.
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