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arXiv 1910.03396math.OC
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二次-二次调节器问题:二次状态非线性系统的近似反馈控制

The Quadratic-Quadratic Regulator Problem: Approximating feedback controls for quadratic-in-state nonlinear systems

Jeff Borggaard, Lizette Zietsman

摘要:

涉及自治二次系统的反馈控制问题是普遍存在的,但由于问题的复杂性,只有有限数量的软件工具可用于近似其解决方案。本文在状态方程和控制费用均为二次型的特殊情况下向前推进了一步。由于它代表线性二次调节器(LQR)问题的自然扩张,我们将此设置描述为二次二次调节器(QQR)问题。这显然更具挑战性,并且将LQR视为必须在此过程中解决的特殊情况。我们描述了一种算法,利用结构的QQR问题时,出现实施Al'Brekht的方法。这种方法适用于具有低次多项式的反馈律,但具有可以通过现代模型降阶法实现的相对适度的模型维数。这个问题有一个优雅的公式和一个解决方案,介绍了几个线性系的结构建议现代张量为基础的线性求解器。我们证明了这种算法的一套随机测试问题,然后将其应用到分布参数控制问题,适合QQR框架。与线性反馈控制法的比较表明,使用QQR制定的适度的好处。

英文摘要:

Feedback control problems involving autonomous quadratic systems are prevalent, yet there are only a limited number of software tools available for approximating their solution due to the complexity of the problem. This paper represents a step forward in the special case where both the state equation and the control costs are quadratic. As it represents the natural extension of the linear-quadratic regulator (LQR) problem, we describe this setting as the quadratic-quadratic regulator (QQR) problem. This is significantly more challenging and holds the LQR as special case that must be solved along the way. We describe an algorithm that exploits the structure of the QQR problem that arises when implementing Al'Brekht's method. This approach is amenable to feedback laws with low degree polynomials but have a relatively modest model dimension that could be achieved by modern model reduction methods. This problem has an elegant formulation and a solution that introduces several linear systems where the structure suggests modern tensor-based linear solvers. We demonstrate this algorithm on a suite of random test problems then apply it to a distributed parameter control problem that fits the QQR framework. Comparisons to linear feedback control laws show a modest benefit using the QQR formulation.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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