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首页> 外文期刊>International Journal of Adaptive Control and Signal Processing >Simple adaptive control - a stable direct model reference adaptive control methodology - brief survey
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Simple adaptive control - a stable direct model reference adaptive control methodology - brief survey

机译：简单的自适应控制-稳定的直接模型参考自适应控制方法-简要调查

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摘要

In spite of successful proofs of stability and even successful demonstrations of performance, the eventual use of model reference adaptive control methodologies in practical real-world systems has met a rather strong resistance from practitioners and has remained very limited. Apparently, the practitioners have a hard time understanding the conditions that can guarantee stable operations of adaptive control systems under realistic operational environments. Besides, it is difficult to measure the robustness of adaptive control system stability and allow it to be compared with the common and widely used measure of phase margin and gain margin that is utilized by present, mainly LTI, controllers. Furthermore, recent counterexamples seem to show that adaptive systems may diverge even when all required conditions are fulfilled. This paper attempts to revisit the fundamental qualities of the common direct model reference adaptive control methodology based on gradient and to show that some of its basic drawbacks have been addressed and eliminated within the so-called simple adaptive control methodology. The sufficient conditions that guarantee stability are clearly stated and lead to similarly clear proofs of stability. The main claim of the paper is that if sufficient information exists for a robust classical design control, same information can be used to implement robust simple adaptive controllers. As many real world applications show, the added value of using add-on adaptive control techniques, the use is pushing the desired performance beyond any previous limits. The paper also shows that the previous counterexamples to model reference adaptive control become just simple, successful, and stable applications of simple adaptive control.
机译：尽管成功地证明了稳定性，甚至成功地证明了性能，但在实际的实际系统中最终使用模型参考自适应控制方法却遭到了从业人员的强烈抵制，并且仍然非常有限。显然，从业人员很难理解可以保证自适应控制系统在实际操作环境下稳定运行的条件。此外，难以测量自适应控制系统稳定性的鲁棒性，并且难以将其与当前（主要是LTI）控制器所利用的相位裕度和增益裕度的常用且广泛使用的度量进行比较。此外，最近的反例似乎表明，即使满足所有要求的条件，自适应系统也可能会出现差异。本文试图重新审视基于梯度的常见直接模型参考自适应控制方法的基本性质，并表明在所谓的简单自适应控制方法中已解决并消除了其一些基本缺陷。明确规定了保证稳定性的充分条件，并导致同样明确的稳定性证明。本文的主要主张是，如果存在足够的信息来进行鲁棒的经典设计控制，则可以使用相同的信息来实现鲁棒的简单自适应控制器。正如许多实际应用显示的那样，使用附加的自适应控制技术的附加价值在于，使用将期望的性能推到了任何先前的限制之外。本文还表明，以前对参考自适应控制进行建模的反例正变得简单，成功且稳定，可以应用于简单自适应控制。

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