能量天平悬挂系统初始位姿识别方法

溯源至普朗克常数的能量天平法由于悬挂系统的初始位姿不理想,电磁力与砝码重力之间很难达到理想的平衡状态,总会不可避免地产生水平力与转矩,进而引起准直误差。立足于能量天平悬挂系统的准直误差的产生机理,结合能量天平悬挂系统的力学和电磁学特性,分析并建立悬挂系统初始位姿与寄生位移之间的数学模型,为准直误差的抑制奠定理论基础。

Recognition of Initial Position and Posture of Suspended Coil in Joule Balance

The Joule balance method is one of the methods to redefine and realize the kilogram based on the Plank constant.Considering the unideal initial position and gesture of the suspended coil,it hard to achieve an ideal balance between the electromagnetic force and weight gravity,and then alignment errors are produced.It is one of the largest uncertainty sources in the Joule balance.Based on the mechanism of the alignment errors and combined with mechanical and electromagnetic properties of the Joule balance,the model between the initial position and gesture of the suspended coil and its parasitic displacements is build up and analyzed.The theory will lay the foundation of restraining the alignment errors.