| 椭圆数字滤波器在动态风洞试验中的应用 |
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| 引用本文： | 沈彦杰,樊昌,佟胜喜,秦加成,李元首. 椭圆数字滤波器在动态风洞试验中的应用[J]. 航空计算技术, 2011, 41(1): 120-122,128 |
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| 作者姓名： | 沈彦杰 樊昌 佟胜喜 秦加成 李元首 |
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| 作者单位： | 中国航空工业空气动力研究院,黑龙江,哈尔滨,150001 |
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| 摘 要： | 由于动态风洞试验比常规静态试验有更多的噪声和干扰,传统的数据处理方法不能满足要求,因此综合考虑动态风洞试验数据的特点,比较不同类型数字滤波器的性能,选择运用椭圆数字滤波器,对动态风洞试验数据进行处理。给出了设计椭圆数字滤波器时所需要的近似求解雅可比椭圆函数的方法,并简单介绍了椭圆数字滤波器的设计过程,给出了必要的设计公式。根据某项目动态风洞试验的试验数据设计了一款低通椭圆数字滤波器,有效地减少了信号中的噪声和干扰,并已成功地用于项目中。
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| 关 键 词： | 数字滤波器 椭圆函数 椭圆数字滤波器 动态风洞试验 非定常空气动力学 |
Application of Elliptic Digital Filter in Dynamic Wind Tunnel Test |
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| SHEN Yan-jie,FAN Chang,TONG Sheng-xi,QING jia-cheng,LI yuan-shou. Application of Elliptic Digital Filter in Dynamic Wind Tunnel Test[J]. Aeronautical Computer Technique, 2011, 41(1): 120-122,128 |
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| Authors: | SHEN Yan-jie FAN Chang TONG Sheng-xi QING jia-cheng LI yuan-shou |
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| Affiliation: | (China Aerodynamic Research Institute of Aeronautics,Harbin 150001,China) |
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| Abstract: | An advanced data processing method is demanded,because there are more noises in the raw data of dynamic wind tunnel test,compared with the static wind tunnel test.The characteristics of dynamic wind tunnel test data and the difference of various digital filters are analyzed,and the elliptic filter is the selection.The numerical computing method of elliptic functions and the design process of the elliptic digital filter are discussed in this paper.An instance is demonstrated which is designed for a research project,and the result was satisfying. |
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| Keywords: | digital filter elliptic functions elliptic digital filter dynamic wind tunnel test unsteady aerodynamics |
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