Finite Time Stability under Saturated Control Input

本文针对饱和输入约束下的一类非线性动力系统的有限时间稳定问题进行研究。基于李雅普诺夫函数理论，给出了实现有限时间稳定的充分条件，得到了有限时间稳定平衡点，估计了系统状态在饱和约束下的收敛速率以及稳定时间边界。其次，结合线性矩阵不等式理论，通过假设李雅普诺夫函数，设计了满足饱和约束的控制增益矩阵与反馈增益矩阵。This article focuses on the finite-time stability problem of a class of nonlinear systems under actuator saturation constraints. Based on the theory of Lyapunov function, sufficient conditions for achieving finite time stability are given, and the finite time stable equilibrium point is obtained. The convergence rate and stable time boundary of the system state under saturation constraints are estimated. Secondly, based on the theory of linear matrix inequality, a control gain matrix and feedback gain matrix satisfying saturation constraints were designed by assuming a Lyapunov function.