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本文从“摩擦误差的倒数”出发分析了品质系数A,得出了以A为判据的一系列优点和缺点。又对应于比定位力矩M′_C,讨论了稳定系数Q。并将M′_C与Q作了比较,得出了Q考虑仪表性能的优越性。并又对应于品质系数A,以x_H,Q,M_B推导出质量因数K。最后文中认为尽管K的计算形式较A复杂,但在干扰力矩M_B等已知的情况下,K在反映仪表的质量方面较A完善,应以K为选择仪表合理参数的判据。
This paper analyzes the quality factor A from the “reciprocal of friction error”, and draws a series of advantages and disadvantages with A as the criterion. Again corresponding to the positioning torque M’_C, the stability factor Q is discussed. And M’_C and Q were compared, come to Q consider the superiority of instrument performance. And corresponding to the quality factor A, the quality factor K is derived from x_H, Q, M_B. In the last part, we consider that although K is more complicated than A, K is better than A in reflecting the quality of instrument in the known circumstance such as disturbing torque M_B. K should be the criterion for selecting reasonable parameters of instrument.