نتایج جستجو برای: uncertain disturbances

تعداد نتایج: 107636  

2014
Junfei Xie Yi Zhou Yan Wan Ashley Mitchell Sandip Roy

In this paper, we develop an analytical approach to planning air traffic flow management (TFM) strategies under uncertain weather. To do that, we model the dynamics of an air traffic flow under uncertain weather as a discrete jump-linear system, which enacts the tracking of transient traffic congestion statistics. We then conduct a sensitivity analysis of traffic congestion to disturbances intr...

2016
Yanan Du Zhenying Liang

ABSTRACT In this paper, a new kind of smooth time-varying controller was proposed for the robust stabilization problem of nonholonomic kinematics mobile robots with uncertain camera parameters based on visual feedback. And a torque controller was also designed by using the method of computed-torque for the dynamic model associated with uncertain disturbances. This torque controller can let the ...

2001
Lilong Cai

This correspondence presents a new decentralized nonlinear adaptive controller (DNAC) for a heating, ventilating, and air conditioning (HVAC) system capable of maintaining comfortable conditions under varying thermal loads. In this scheme, an HVAC system is considered to be two subsystems and controlled independently. The interactions between the two subsystems are treated as deterministic type...

2007
Jin Zhu Hong-sheng Xi Hai-bo Ji Bing Wang

A robust adaptive controller design for a class of Markovian jump parametric -strictfeedback systems is given. The disturbances considered herein include both uncertain nonlinearities and Wiener noises of unknown covariance. And they satisfy some boundconditions. By using stochastic Lyapunov method in Markovian jump systems, a switching robust adaptive controller was obtained that guarantees gl...

2011
Zhenbin Du Tsung-Chih Lin

Abstract This paper addresses the problem of adaptive fuzzy tracking control for MIMO uncertain nonlinear time-delay systems. The control scheme combines adaptive fuzzy control with  H control. Adaptive time-delay fuzzy logic systems are constructed and used to approximate the uncertain unknown timedelay functions. The  H compensator is designed to eliminate fuzzy approximation errors and ext...

Journal: :Neural networks : the official journal of the International Neural Network Society 2014
Huyen T. Dinh R. Kamalapurkar Shubhendu Bhasin Warren E. Dixon

A dynamic neural network (DNN) based robust observer for uncertain nonlinear systems is developed. The observer structure consists of a DNN to estimate the system dynamics on-line, a dynamic filter to estimate the unmeasurable state and a sliding mode feedback term to account for modeling errors and exogenous disturbances. The observed states are proven to asymptotically converge to the system ...

Journal: :Automatica 2015
Yutao Tang Yiguang Hong Xinghu Wang

In this paper, a distributed output regulation problem is formulated for a class of uncertain nonlinear multi-agent systems subject to local disturbances. The formulation is given to study a leader-following problem when the leader contains unknown inputs and its dynamics is different from those of the followers. Based on the conventional output regulation assumptions and graph theory, distribu...

2016
Justin R. Klotz Teng-Hu Cheng Warren E. Dixon

A distributed controller is developed that yields cooperative containment control of a network of autonomous dynamical systems. The networked agents are modeled with uncertain nonlinear Euler–Lagrange dynamics affected by an unknown time-varying exogenous disturbance. The developed continuous controller is robust to input disturbances and uncertain dynamics such that asymptotic convergence of t...

Journal: :Fuzzy Sets and Systems 2003
Fang-Ming Yu Hung-Yuan Chung Shi-Yuan Chen

In this paper, the principle of sliding mode control is used as a basis to develop an adaptive fuzzy controller for uncertain dynamic time-delayed systems with series nonlinearities. The control method provides a simple way to achieve asymptotic stability of the uncertain time-delayed system. Other attractive features of the method include a minimal realization of the adaptive fuzzy controller ...

Journal: :IEEE Trans. Automat. Contr. 2003
Shuzhi Sam Ge Jing Wang

This note presents a robust adaptive control approach for a class of time-varying uncertain nonlinear systems in the strict feedback form with completely unknown time-varying virtual control coefficients, uncertain time-varying parameters and unknown time-varying bounded disturbances. The proposed design method does not require any a priori knowledge of the unknown coefficients except for their...

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