基于XC9536的高精度电流/频率转换电路设计?
By?measuring?the?apparent?acceleration?of?vehicle?igh?Precision?Current/Frequency?Conversion?Circuit?Design? Based?on?XC9536
苏全振 1格根塔娜 2赵凤贤3
作者信息
- 1. 锦州七七七微电子有限责任公司 辽宁锦州 121000
- 2. 锦州凯美能源有限公司 辽宁锦州 121000
- 3. 辽宁工业大学电气工程学院 辽宁锦州 121000
- 折叠
摘要
加速度计是在捷联惯性导航系统中测量载体的视加速度的重要部件，其输入大多为模拟电流信号。由于电流测量精度的提高受到限制，本设计采用可编程逻辑器件 XC9536对加速度计电流信号进行实时采样，利用最小二乘法对输入电流进行补偿实现高精度电流/频率转换。从测试结果上可知，电流/频率转换精度提高到6.8×10-6，满量程输出频率提高到256K。该电路实现了高速、高精度电流/频率转换，已经应用到实际产品中。
Abstract
The accelerometer is an important part by measuring apparent acceleration in the Strap-down inertial navigation system,and its output is usual y simulated current signal.Because the improving of current measurement accuracy is constrained,the design adopts the Complex Programmable Logic Device XC9536 to accelerometer current real-time signal sampling , and using least square method compensation input current of the realization of Current/Frequency conversion.From the test results that Current/Frequency conversion accuracy is increased to 8×10-6and improved the ful-scale output frequency to 256K.The circuit realizes high speed and high precision current / frequency conversion,which has been applied to the actual product.
关键词
电流/频率转换/最小二乘法/XC9536/恒流源Key words
Current/Frequency?conversion/the?least?square?method/XC9536/constant?current?source引用本文复制引用
出版年
2015
NETL
NSTL
万方数据