Chin. Phys. B ›› 2014, Vol. 23 ›› Issue (1): 10505-010505.doi: 10.1088/1674-1056/23/1/010505

• GENERAL • 上一篇    下一篇

Lyapunov function as potential function:A dynamical equivalence

袁若石a b, 马易安c, 苑波d, 敖平b e   

  1. a School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;
    b Shanghai Center for Systems Biomedicine, Shanghai Jiao Tong University, Shanghai 200240, China;
    c Department of Applied Mathematics, University of Washington, Seattle 98195, USA;
    d Department of Computer Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;
    e Department of Physics, Shanghai Jiao Tong University, Shanghai 200240, China
  • 收稿日期:2013-03-20 修回日期:2013-05-16 出版日期:2013-11-12 发布日期:2013-11-12
  • 基金资助:
    Project supported by the National Basic Research Program of China (Grant No. 2010CB529200) and the National Natural Science Foundation of China (Grant Nos. 61073087 and 91029738).

Lyapunov function as potential function:A dynamical equivalence

Yuan Ruo-Shi (袁若石)a b, Ma Yi-An (马易安)c, Yuan Bo (苑波)d, Ao Ping (敖平)b e   

  1. a School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;
    b Shanghai Center for Systems Biomedicine, Shanghai Jiao Tong University, Shanghai 200240, China;
    c Department of Applied Mathematics, University of Washington, Seattle 98195, USA;
    d Department of Computer Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;
    e Department of Physics, Shanghai Jiao Tong University, Shanghai 200240, China
  • Received:2013-03-20 Revised:2013-05-16 Online:2013-11-12 Published:2013-11-12
  • Contact: Yuan Ruo-Shi E-mail:yrs12345@sjtu.edu.cn
  • Supported by:
    Project supported by the National Basic Research Program of China (Grant No. 2010CB529200) and the National Natural Science Foundation of China (Grant Nos. 61073087 and 91029738).

摘要: For a physical system, regardless of time reversal symmetry, a potential function serves also as a Lyapunov function, providing convergence and stability information. In this paper, the converse is constructively proved that any dynamics with a Lyapunov function has a corresponding physical realization: a friction force, a Lorentz force, and a potential function. Such construction establishes a set of equations with physical meaning for Lyapunov function and suggests new approaches on the significant unsolved problem namely to construct Lyapunov functions for general nonlinear systems. In addition, a connection is found that the Lyapunov equation is a reduced form of a generalized Einstein relation for linear systems, revealing further insights of the construction.

关键词: Lyapunov function, potential function, stochastic process, generalized Einstein relation

Abstract: For a physical system, regardless of time reversal symmetry, a potential function serves also as a Lyapunov function, providing convergence and stability information. In this paper, the converse is constructively proved that any dynamics with a Lyapunov function has a corresponding physical realization: a friction force, a Lorentz force, and a potential function. Such construction establishes a set of equations with physical meaning for Lyapunov function and suggests new approaches on the significant unsolved problem namely to construct Lyapunov functions for general nonlinear systems. In addition, a connection is found that the Lyapunov equation is a reduced form of a generalized Einstein relation for linear systems, revealing further insights of the construction.

Key words: Lyapunov function, potential function, stochastic process, generalized Einstein relation

中图分类号:  (Nonlinear dynamics and chaos)

  • 05.45.-a
05.40.-a (Fluctuation phenomena, random processes, noise, and Brownian motion) 89.75.-k (Complex systems)