直流调速系统的LQSF*设计

改善调速系统的动态速降问题,早已引起设计和应用部门的重视,本文是从工程应用观点出发,用状态空间方法中的二次型线性最优调节器技术改进直流调速系统的新尝试,同时对系统的控制结构的合理性作了讨论。文中除了介绍基本型和无静差型LQSF调速系统外,作者还提出了一种新的无静差-低动态速降型LQSF调速系统控制结构。经过分析、计算机仿真和部分物理实验,证实这种新型调速系统无论在响应速度上,还是稳定裕量上都比目前通用的西门子方案“双环”调速系统优越,动态速降有大幅度的改进,且和稳定性的矛盾不大,同时噪声的影响也不大,很有工业推广价值。

D.C. SPEED CONTROL SYSTEMS WITH LQSF DESIGN

Much attention has been paid to the improvement of the impact drop of speed control systems. From the engineering point of view, a new attempt is made to improve the D. C. speed control systems by using the quadratic optimal linear regulator technique in state space method. At the same time the rationality of the control system structure is discussed in this paper. In addition to the basic-type and the static error free-type LQSF speed control systems, we propose a new control structure, the static error free-type with low impact drop type system. Theoretical analysis, digital computer simulation and some physical experiments show that these new control systems are superior to the well-known "Siemens double loops system" both in fast response and in high stability margins, and that the impact drop is improved greatly with small measurement noise effect. Hence, such new systems are worth to be recommended for industrial applications.