Nonlinear system
Related papers: 20
About
A nonlinear system is any dynamical system in which the output is not proportional to the input — meaning superposition does not hold and small changes can produce disproportionately large or complex responses. Unlike linear systems, which are analytically tractable and well-characterized, nonlinear systems exhibit behaviors such as limit cycles, bifurcations, chaos, and input-dependent coupling that demand specialized mathematical tools for analysis and control. In robotics and AI, virtually every real-world system of interest is nonlinear: robot manipulator dynamics involve inertial coupling and gravitational terms, wheeled robots exhibit nonholonomic constraints, and neural network function approximators are inherently nonlinear. Techniques such as feedback linearization, sliding mode control, adaptive control, and nonlinear optimization are routinely employed to stabilize and control these systems, while learning-based approaches like policy gradient methods and deep operator networks handle cases where analytical models are unavailable or uncertain. Understanding nonlinear systems matters because ignoring their true nature leads to degraded performance, instability, or unsafe behavior in practice. Properly accounting for nonlinearity enables engineers to design controllers with guaranteed stability, robustness to disturbances, and the precision required for high-performance applications in manipulation, locomotion, and autonomous navigation.
Top Researchers
Top Cited Papers
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Introduction to robotics: Mechanics and control
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