本文将TG588B型阻尼分析天平改装成发光=极管(LED)数字显示的电子天平,用根轨迹法从理论上探讨提高该天平稳定性的途径和方法,並在实验中得到了证实。该天平的最大称量比扭力式电子天平约大两个数量级,为199.9克。其灵敏度、线性度和稳定时间分别为0.001克、0.05%和0.5秒。 In this paper, the TG588B damping analytical balance is converted into an electronic balance with luminescence = diode (LED) digital display. The ways and methods to improve the stability of the balance are discussed theoretically with the root locus method, and the experiment is proved. The balance of the maximum weighing than the torque electronic balance about two orders of magnitude, to 199.9 grams. Its sensitivity, linearity and settling time were 0.001 g, 0.05% and 0.5 sec, respectively.