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arXiv 2305.09441eess.SYcs.FLcs.ROcs.SY
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STLCCP:基于高效凸优化的信号时序逻辑规范框架

STLCCP: Efficient Convex Optimization-based Framework for Signal Temporal Logic Specifications

CentraleSupélec(中央高等电力学院);University of Paris-Saclay(巴黎萨克雷大学)

Yoshinari Takayama, Kazumune Hashimoto, Toshiyuki Ohtsuka

AI总结:

针对现有方法难以高效求解复杂长时域STL规范控制问题的挑战,提出STLCCP框架,利用STL结构特性转化为凸优化问题并结合改进CCP求解,在运动规划基准测试中表现优于现有方法。

摘要:

信号时序逻辑(STL)是一种强大的形式化方法,用于指定动态系统中的各种时序属性。然而,现有方法如混合整数规划和非线性规划,在高效求解具有复杂、长时域STL规范的控制问题时往往面临困难。本研究提出STLCCP,一种新颖的基于凸优化的框架,它利用STL的关键结构特性:鲁棒性函数的单调性、其层次树结构,以及优化中的凸性/凹性与规范中的合取性/析取性之间的对应关系。该框架首先对STL公式进行结构感知分解,将问题转化为等价的凸差(DC)规划,然后使用改进版的凸凹过程(CCP)将其顺序求解为凸二次规划。为进一步提高效率,我们使用一种专为该框架定制的称为mellowmin函数的平滑近似鲁棒性函数。在运动规划基准测试上的数值实验表明,STLCCP能高效处理长时域复杂场景,性能优于现有方法。

英文摘要:

Signal temporal logic (STL) is a powerful formalism for specifying various temporal properties in dynamical systems. However, existing methods, such as mixed-integer programming and nonlinear programming, often struggle to efficiently solve control problems with complex, long-horizon STL specifications. This study introduces \textit{STLCCP}, a novel convex optimization-based framework that leverages key structural properties of STL: monotonicity of the robustness function, its hierarchical tree structure, and correspondence between convexity/concavity in optimizations and conjunctiveness/disjunctiveness in specifications. The framework begins with a structure-aware decomposition of STL formulas, transforming the problem into an equivalent difference of convex (DC) programs. This is then solved sequentially as a convex quadratic program using an improved version of the convex-concave procedure (CCP). To further enhance efficiency, we develop a smooth approximation of the robustness function using a function termed the \textit{mellowmin} function, specifically tailored to the proposed framework. Numerical experiments on motion planning benchmarks demonstrate that \textit{STLCCP} can efficiently handle complex scenarios over long horizons, outperforming existing methods.

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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