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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。
Because the dynamic wind tunnel test has more noise and interference than the conventional static test, the traditional data processing method can not meet the requirements. Therefore, considering the characteristics of the dynamic wind tunnel test data and comparing the performance of different types of digital filters, Filter, dynamic wind tunnel test data processing. The approximate solution of Jacobian elliptic function for elliptical digital filter is given, and the design process of elliptical digital filter is briefly introduced. The necessary design formulas are given. According to the experimental dynamic wind tunnel test data of a project, a low-pass elliptical digital filter was designed to effectively reduce the noise and interference in the signal and has been successfully used in the project.