压电杆式天平六维力测量研究  

6-D force measurement of piezoelectric pole balance

作　　者：钱致光 任宗金[1] 王宇航 王郁赫 徐馨 QIAN Zhiguang;REN Zongjin;WANG Yuhang;WANG Yuhe;XU Xin(School of Mechanical Engineering,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]大连理工大学机械工程学院,辽宁大连116024

出　　处：《振动与冲击》2024年第17期177-183,共7页Journal of Vibration and Shock

基　　金：国家自然科学基金(52075079);国家科技重大专项(J2019-V-0011-0106);国家重点研发计划(2019YFA0709003)。

摘　　要：风洞测力天平是飞行器气动力研究的重要设备。针对某些风洞实验中飞行器模型内腔空间有限、高动态测量的现实需求,提出了单晶片面域划分多区域测量的压电式多维力测量方法。计算了六维力下石英晶片感应电荷密度分布,由此划分晶片面域,得到六维力解耦公式,并使用COMSOL软件对压电晶片施加力/力矩,仿真晶片感应电荷分布,验证理论模型的正确性。开发压电杆式天平及其标定装置,对压电杆式天平进行静动态标定试验,天平非线性误差不超过1.31%,重复性误差不超过1.00%,固有频率高于2 700 Hz,验证了在天平安装空间狭小情况下,使用压电晶片分区面域测量高频六维动态力的可行性。Wind tunnel force balance is an important equipment for aircraft aerodynamic study.Here,aiming at limited inner cavity space and high dynamic measurement of aircraft models in some wind tunnel experiments,a piezoelectric multi-dimensional force measurement method based on single crystal surface being divided into multi-region for measurement was proposed.Induced charge density distribution on the quartz chip was calculated under 6-D force,according this the chip area was divided to obtain the 6-D force decoupled formula.The software COMSOL was used to exert force/torque on the piezoelectric chip,simulate the distribution of induced charges on the chip,and verify the correctness of the theoretical model.A piezoelectric pole balance and its calibration device were developed,static and dynamic calibration experiments were conducted for the piezoelectric pole balance.It was shown that the nonlinear error of the balance does not exceed 1.31%,the repeatability error does not exceed 1.00%,and the balance’s natural frequency is higher than 2700 Hz to verify the feasibility of using piezoelectric crystal chip partitioned region to measure high-frequency 6-D dynamic force in the balance’s limited installation space.

关 键 词：压电式天平 电荷分布 六维力测量 分区面域 标定试验 

分 类 号：TH823[机械工程—仪器科学与技术]