【摘要】 基于系统稳定性对于控制系统设计的重要性,从零阶保持过程和滞后一拍控制这两个方面分析了数字化过程对双馈发电机控制系统稳定性的影响,分析结果表明:这些数字控制环节的引入使系统的闭环稳定性较之模拟控制变差。据此提出了一种直接在离散域中整定PI控制器参数的方法,文中分析了PI控制器各参数对系统稳定性和动态响应的影响,从而推算出了各参数的调节范围,该方法准确、方便,对实际工程的控制器设计有一定的指导意义,最后通过仿真验证了文中所述在离散域中整定控制器参数方法的正确性。更多还原

【Abstract】 Based on the importance of system stability for the design of the control system, the effect of zero-order-hold and one-step-delay of digital control on the control system stability was analyzed. The experimental results show that the closed-loop stability of the system is worser compared with analog control with the introduction of digital control. In this paper, a method of setting the parameters of PI controller in discrete domain was proposed. The influence of PI controller parameters on system stability and dynamic response was analyzed, and the adjustment range of each parameter was deduced, which is convenient and accurate for the controller design of the actual project. Finally, simulation results show that the theoretical analysis is correct.更多还原