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首页> 外文期刊>Journal of Process Control >Analytical design of two-degree-of-freedom control scheme for open-loop unstable processes with time delay
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Analytical design of two-degree-of-freedom control scheme for open-loop unstable processes with time delay

机译：具有时滞的开环不稳定过程的二自由度控制方案的解析设计

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This paper proposes an analytical two-degree-of-freedom control scheme for open-loop unstable processes with time delay, which leads to the remarkable improvements of regulatory capacity for both of reference input tracking and load disturbance rejection. Firstly a conventional proportional or plus derivative controller is deliberately employed for stabilizing the setpoint response. Then the setpoint tracking controller is analytically derived in terms of the lntegral-suared-error (ISE) performance specification. By proposing the desired closed-loop complementary sensitivity function for rejecting load disturbances, the corresponding controller, i.e. disturbance estimator, is inversely figured out. Hence the nominal setpoint response is decoupled from the load disturbance response by virtue of the open-loop control manner for the setpoint tracking. In consequence, both of them can be optimized simultaneously and separately. At the same time, robust stability analysis for the proposed control structure is provided in the presence of the process multiplicative uncertainty. Accordingly the on-line tuning rule for the single. adjustable parameter of each controller is suggested to cope with the process unmodeled dynamics in practice. Finally, several illustrative examples are included to demonstrate. the superiority of the proposed method. (c) 2004 Elsevier Lid. All rights reserved.
机译：本文提出了一种具有时滞的开环不稳定过程的解析两自由度控制方案，该方案导致参考输入跟踪和负载扰动抑制的调节能力显着提高。首先，故意采用常规的比例或正微分控制器来稳定设定值响应。然后根据积分误差（ISE）性能规范分析得出设定点跟踪控制器。通过提出期望的闭环互补灵敏度函数来拒绝负载干扰，反过来找出了相应的控制器，即干扰估计器。因此，借助于用于额定值跟踪的开环控制方式，将额定额定值响应与负载扰动响应分离。结果，可以同时且分别地优化它们两者。同时，在存在过程乘法不确定性的情况下，针对所提出的控制结构提供了鲁棒的稳定性分析。因此，单人的在线调整规则。建议每个控制器的可调参数在实践中应对过程未建模的动力学。最后，包括几个说明性示例进行演示。所提方法的优越性。 （c）2004年Elsevier Lid。版权所有。

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