Recent developments in quantitative feedback theory (QFT) lead to feedforward design problems with both magnitude and phase constraints. In these cases, manual feedforward tuning becomes much more challenging and time consuming than the traditional prefilter shaping taking place on the Bode plot. This article presents a general procedure for the automatic synthesis of such elements. Feedforward bounds in the complex plane are expressed as constraints of a linear programming problem in which the Bode real-complex relation is implicitly considered, ensuring a stable rational solution. The methodology is successfully tested in a well-known benchmark problem.

中文翻译：

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定量反馈理论中前馈元素的自动合成

定量反馈理论 (QFT) 的最新发展导致了具有幅度和相位约束的前馈设计问题。在这些情况下，手动前馈调谐变得比在 Bode 图上进行的传统预滤波器整形更具挑战性和耗时。本文介绍了自动合成此类元素的一般程序。复平面中的前馈边界表示为线性规划问题的约束，其中隐式考虑 Bode 实数-复数关系，确保稳定的有理解。该方法在一个众所周知的基准问题中得到了成功的测试。