论文标题

关于安全,稳定控制法律的兼容性和吸引力区域

On Compatibility and Region of Attraction for Safe, Stabilizing Control Laws

论文作者

Cortez, Wenceslao Shaw, Dimarogonas, Dimos V.

论文摘要

提出了一种新型的控制方法,以确保安全,稳定控制定律的兼容性,即同时满足非线性仿射系统的渐近稳定性和约束满意度。结果取决于渐近稳定的控制定律和零控制屏障函数(ZCBF),但不需要控制Lyapunov函数(CLF)。定义了足够的吸引区域条件,该条件是在其中拟议的控制可以安全地稳定系统的,同时保留原始稳定控制法的脱粒化功能。提出的非线性仿射系统的方法需要在状态空间的很大一部分上检查系统动力学的条件,这在计算上可能很昂贵。为了促进寻找兼容性的搜索,我们将结果扩展到一类非线性系统,包括机械系统,新的控制器旨在保证被动性,安全性和稳定性。数值示例用于证明所提出的技术。

A novel control method is proposed to ensure compatibility of safe, stabilizing control laws, i.e., simultaneous satisfaction of asymptotic stability and constraint satisfaction for nonlinear affine systems. The results are dependent on an asymptotically stabilizing control law and a zeroing control barrier function (ZCBF), but do not require a control Lyapunov function (CLF). Sufficient conditions for a region of attraction are defined for which the proposed control safely stabilizes the system, while preserving the decrescent Lyapunov function of the original stabilizing control law. The proposed methodology for nonlinear affine systems requires checking conditions of the system dynamics over a substantial portion of the state space, which may be computationally expensive. To facilitate the search for compatibility, we extend the results to a class of nonlinear systems including mechanical systems for which a novel controller is designed to guarantee passivity, safety, and stability. Numerical examples are used to demonstrate the proposed technique.

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