| 摘要: |
| 雷达伺服系统是全闭环伺服系统。文中分析了D／A变换器（DAC）的工作特性以及在全闭环伺服系统中的应用特点。由于DAC和齿轮减速比都影响着伺服系统的开环增益，当系统开环增益一定时，DAC位数的实际作用和减速比的选择相互限制，在设计雷达伺服系统中需注意。文中同时指出，数字式PWM的实质也是一种DAC，它的位数选择同样遵循DAC的选择原则。 |
| 关键词: 雷达伺服系统 数字脉宽调制 开环增益 DAC位数 |
| DOI：10.3969/j.issn.1001-893X. |
| 投稿时间：2006-01-20修订日期：2006-04-15 |
| 基金项目: |
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| Resolution Selection of D/A Converter(DAC) and Digital PWM in Radar Servo System |
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| Abstract: |
| Radar servo system is a full close-loop servo system.The features of D/A converter(DAC) and its application in full close-loop servo system are introduced in this paper.The open-loop gain of servo system is influenced by the resolution of DAC and the gear ratio.When the open-loop gain of servo system is determined,the selection of DAC resolution and gear ratio is restricted each other and should be paid much attention in the design of servo system.It is also proposed in this paper that the digital PWM is a DAC in essence and its resolution selection rules should also follow that of DAC. |
| Key words: radar servo system digital PWM open - loop gain DAC resolution |
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