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| 国标圆度仪数字滤波器传输特性逼近方法的研究 | |
| 引用本文： | 邓春梅,周军,陈吉红,谭久彬. 国标圆度仪数字滤波器传输特性逼近方法的研究[J]. 仪器仪表学报, 2000, 21(5): 521-524 |
| 作者姓名： | 邓春梅 周军 陈吉红 谭久彬 |
| 作者单位： | 1. 国家数控系统工程技术研究中心,武汉,430074 2. 广东美的信息技术公司,顺德,528311 3. 哈尔滨工业大学,哈尔滨,150006 |
| 摘 要： | 国标ＧＢ７２３５－８７给出了圆度仪滤波器的传输特性曲线，由于量值的传递关系，在圆度测量数据预处理时，要求所设计的滤波器的幅度传输特性曲线严格逼近国标给定曲线。本文提出了修正载止频率的Ｂｕｔｔｅｒｗｏｒｔｈ混合滤波设计法，使得滤波器在截止频率处的传输误差为零，其它频段对国标特性曲线的最大逼近误差为２％。该滤波器已应用于ＨＩＴ－ＴＡＮＬＹ大型圆柱度仪误差分离系统中，成功地复现了国标滤波器幅度传输特性曲 |
| 关 键 词： | 圆度仪 数字滤波器 传输特性 逼近方法 |
The Realization of the Digital Filter with Accurate Transmission Property for Roundness Instruments |
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| Deng Chunmei,ZhouJun,Chen Jihong,Tan Jiubin. The Realization of the Digital Filter with Accurate Transmission Property for Roundness Instruments[J]. Chinese Journal of Scientific Instrument, 2000, 21(5): 521-524 | |
| Authors: | Deng Chunmei ZhouJun Chen Jihong Tan Jiubin |
| Abstract: | The amplitude transmission property of the digital filter for roundness instruments is given by the standard No.GB72 35- 87of the People's Republic of China.For the unity of the metrology value and the com- parability of different instruments,the designed filter's amplitude transmission property should approximate to the standard curve as possible as it can be.By modifying the Butterworth function,the designed filter's trans- mission error at the break frequency is zero,and the maximum transmission error at other band is less than 2 % ,it approximate to the standard curve perfectly.The method is discussed in this paper in detail. |
| Keywords: | IIR filter Dual- linear transform Compound filter |
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