CAJ | 학술논문

风洞天平是空气动力学试验的重要测力装置，针对压电天平动态响应速度快、跟随特性好、结构简单、量程范围大的特点，研制了一种可应用于风洞试验中动态气动荷载测量的压电天平．对压电天平的静态校准方法进行了研究，推导出其校准公式．在风洞天平校准台上，完成了压电天平的静态单分量校准与复合加载试验，得到压电天平的标定矩阵，压电天平的非线性误差和重复性误差分别为0．06％、0．19％，最大向间干扰1．94％．对试验结果进行误差分析，给出了压电天平测试系统的不确定度．试验结果表明：压电天平主要性能指标良好，满足测试精度要求．
풍동천평시공기동역학시험적중요측력장치，침대압전천평동태향응속도쾌、근수특성호、결구간단、량정범위대적특점，연제료일충가응용우풍동시험중동태기동하재측량적압전천평．대압전천평적정태교준방법진행료연구，추도출기교준공식．재풍동천평교준태상，완성료압전천평적정태단분량교준여복합가재시험，득도압전천평적표정구진，압전천평적비선성오차화중복성오차분별위0．06％、0．19％，최대향간간우1．94％．대시험결과진행오차분석，급출료압전천평측시계통적불학정도．시험결과표명：압전천평주요성능지표량호，만족측시정도요구．
Wind tunnel balance is one of the most important measurement equipment in aerodynamic testing .For the characteristics of fast response ,good following ,simple structure and large measuring range ,a new type of piezoelectric six-component balance is developed to measure the airloads of dynamic motion . According to the characteristics of piezoelectric balance , the method of static calibration and the derivation of calibration formula are studied . With the balance calibration platform ,the single component calibration and combined loading experiments are accomplished .The calibration matrix and performance index are concluded in w hich the nonlinearity error and repeatability error are 0 .06% ,0 .19% respectively ,and the maximum crosstalk is 1 .94% .An error analysis of experimental results and the uncertainty of measurement system are represented at last . T he results obtained demonstrate that the piezoelectric balance can satisfy the requirements of measurement with good performance .