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摘要: 通过一种高增益PI控制器（High gain proportion integration，HGPI）和一种内反馈器（Internal feedback device，IFD）构造出一种内反馈控制器（Internal feedback controller，IFC）.文中通过HGPI进行IFD逆变换与标称模型的分析方法，分析了IFC的控制特性.IFC较好解决了一些高性能控制器的结构复杂和难以工程化等问题.IFD采用了一种不改变实际s阶次的任意阶的内反馈结构（Internal feedback structure，IFS），对于高阶对象无需降阶处理.文中还从信号处理的角度提出了一种用于IFC降阶处理的正弦跟踪滤波器（Sinusoid tracking filter，STF），具有较小的滞后特性.文中提出的内反馈控制器IFC具有简单的结构、整定参数较少、较好的鲁棒性和较强的抗扰性，并且具有良好工程应用前景.数学分析、仿真实验（包括物理实验）和实际应用的结果进一步证实了文中所提出的内反馈控制器IFC的正确性和有效性.Abstract: An internal feedback controller (IFC) is constructed by a high gain proportion integration controller (HGPI) and an internal feedback device (IFD) in this paper. By utilizing the reverse conversion of IFD and nominal model of HGPI, the control characteristics of IFC are analyzed. Problems of traditional controllers such as complicated structure and hard to implement can be solved by this IFC. In the IFD, an internal feedback structure with universal order is adopted, which does not change the actual s order. For high-order plants, the proposed controller needs no order-reduction operation. A sinusoid tracking filter (STF) is designed to handle the order-reduction of IFC from the vision of signal processing, which has a better latency feature. The proposed IFC, which has the advantages of simple structure, fewer tuning parameters, good robustness and strong anti-interference, would have a good practical application prospect. The correctness and effectiveness of the proposed IFC has been validated by theoretic analysis, simulation and physical experiments and practical application.1) 本文责任编委 谢永芳
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图 3 内反馈控制器开环频率特性示意图
Fig. 3 Frequency characteristic diagram of internal feedback controller of open loop
图 4 四阶内反馈控制系统频域相位稳定裕度(示意图 1)
Fig. 4 Schematic diagram of frequency domain phase stability margin of four-order of internal feedback control system (NO. 1)
图 5 四阶内反馈控制系统频域相位稳定裕度(示意图 2)
Fig. 5 Schematic diagram of frequency domain phase stability margin of four-order of internal feedback control system (NO. 2)
图 8 双积分对象控制特性仿真实验结果
Fig. 8 The diagram of control characteristic simulation results of two integral object
图 9 低阶惯性对象控制特性仿真实验结果(示意图 1)
Fig. 9 The diagram of control characteristic simulation results of low order inertia object (NO. 1)
图 13 高阶惯性对象控制特性仿真实验结果(示意图 3)
Fig. 13 The diagram of control characteristic simulation results of high order inertia object (NO. 3)
图 10 低阶惯性对象控制特性仿真实验结果(示意图 2)
Fig. 10 The diagram of control characteristic simulation results of low order inertia object (NO. 2)
图 14 高阶惯性对象控制特性仿真实验结果(示意图 4)
Fig. 14 The diagram of control characteristic simulation results of high order inertia object (NO. 4)
图 11 高阶惯性对象控制特性仿真实验结果(示意图 1)
Fig. 11 The diagram of control characteristic simulation results of high order inertia object (NO. 1)
图 12 高阶惯性对象控制特性仿真实验结果(示意图 2)
Fig. 12 The diagram of control characteristic simulation results of high order inertia object (NO. 2)
图 16 过热气温调节系统优化示意图
Fig. 16 The optimization diagram of the superheated steam temperature regulation system
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