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从系统的数学模型出发，讨论了功率放大器环节的时间常数Ｔａ 对系统动态性能的影响，提出了采用局部ＰＤ校正以减小该时间常数Ｔａ 的方法。理论计算与实际应用表明，局部ＰＤ 校正能明显改善系统的动态性能。附图６ 幅，参考文献４ 篇。
Based on the mathematical model of the system, the influence of the time constant Ta of the power amplifier on the dynamic performance of the system is discussed. The method of using local PD correction to reduce the time constant Ta is proposed. Theoretical calculation and practical application show that partial PD correction can obviously improve the dynamic performance of the system. Figure 6, reference 4.