长气管气动马达速度控制系统及分析

Air motor speed control system with long tube and its analysis

针对本质防爆的要求，提出长气管气动马达速度控制系统，建立了系统模型；并对该系统的主要特征———非线性饱和延迟进行了根轨迹分析、史密斯预估器控制的稳定判断及描述函数法的分析．分析结果表明，延迟对该系统的稳定性影响最大。

To come up to the nature standard, an air motor speed control system with long tubes has been designed and the mathematical model of system has been set up. Because of nonlinear saturation and delay characteristics, studies of root locus, judging stability condition of system from Nyquist locus and system analysis with the describing function have been done. The result makes it clear that delay has great infection on the system, so it has to be paid attention to when a controller is designed.