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arXiv 1707.04729math.OC
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线性时变系统的时域协方差控制

Finite-Horizon Covariance Control of Linear Time-Varying Systems

Maxim Goldshtein, Panagiotis Tsiotras

摘要:

研究了离散线性时变系统在状态完全可观测的随机扰动下的有限时域最优控制问题。系统的初态取自已知的高斯分布,最终状态分布要求达到给定的目标高斯分布,同时最小化控制努力的期望值。我们推导出的线性最优控制策略,首先提出了一个有效解的扩散少的情况下,然后我们解决了扩散的情况下,通过重新制定的系统作为一个叠加的扩散少的系统。这种重新表述导致一个简单的解决方案,这可以有效地解决使用数值方法的条件。我们表明,所得到的解决方案符合特定的终端成本权重矩阵的LQG问题。这一事实为使用线性状态控制器提供了额外的理由。此外,它允许控制器的有效迭代实现。

英文摘要:

We consider the problem of finite-horizon optimal control of a discrete linear time-varying system subject to a stochastic disturbance and fully observable state. The initial state of the system is drawn from a known Gaussian distribution, and the final state distribution is required to reach a given target Gaussian distribution, while minimizing the expected value of the control effort. We derive the linear optimal control policy by first presenting an efficient solution for the diffusion-less case, and we then solve the case with diffusion by reformulating the system as a superposition of diffusion-less systems. This reformulation leads to a simple condition for the solution, which can be effectively solved using numerical methods. We show that the resulting solution coincides with a LQG problem with particular terminal cost weight matrix. This fact provides an additional justification for using a linear in state controller. In addition, it allows an efficient iterative implementation of the controller.

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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