恒温热线风速仪的一种新型校准方法  

A new calibration method of constant temperature hot wire anemometer

作　　者：姚惠元[1] 刘国政[1] 孙楠[1] 董军[1] 

机构地区：[1]中国航空工业空气动力研究院,黑龙江哈尔滨150001

出　　处：《现代电子技术》2013年第23期110-112,共3页Modern Electronics Technique

摘　　要：恒温热线风速仪作为一种风洞流场测量元件,在湍流脉动测速任务中发挥了重要作用。对热线风速仪的校准工作进行了研究,将B样条与递推最小二乘相结合,提出了一种新型校准方法。该方法选取具有低阶光滑特性的B样条函数进行逆向建模,并采用递推最小二乘的方法估计控制参数,有效地提高了校准精度和实时性。通过对实际风洞实验的数据分析,验证了提出的该校正方法的有效性,并表明其具有样本点少、校正精度高、简单实用等显著优点。As a flow field measuring elements for wind tunnel, the constant temperature hot wire anemometer plays an im- portant role in the measurement of turbulent fluctuation task. The calibration of the hot wire anemometer is studied. Using the B- spline and recursive least squares as a combination, a new calibration method is proposed, which chooses B-spline function with low order smooth characteristics for reverse modeling, and estimates the control parameters using the method of recursive least squares. The method effectively improved the calibration accuracy and real-time. Through the analysis of wind tunnel experimen- tal data, the effectiveness of the correction method is validated. The experiment shows that it has the advantages of fewer sample points, higher correction accuracy, simple and useful.

关 键 词：热线风速仪 校准 B样条 递推最小二乘方法 

分 类 号：TN710.34[电子电信—电路与系统]