Nonlinear disturbance observer-based control for multi-input multi-output nonlinear systems subject to mismatching condition

Nonlinear disturbance observer-based control for multi-input multi-output nonlinear systems subject to mismatching condition

Robust Control Approach for Input-Output Linearizable Nonlinear Systems Using High-Gain Disturbance Observer

This paper addresses a robust control approach for a class of input-output linearizable nonlinear systems with uncertainties and modeling errors considered as unknown inputs. As known, the exact feedback linearization method can be applied to control input-output linearizable nonlinear systems, if all the states are available and modeling errors are negligible. The mentioned two prerequisites d...

Output Consensus Control of Nonlinear Non-minimum Phase Multi-agent Systems Using Output Redefinition Method

This paper concerns the problem of output consensus in nonlinear non-minimum phase systems. The main contribution of the paper is to guarantee achieving consensus in the presence of unstable zero dynamics. To achieve this goal, an output redefinition method is proposed. The new outputs of agents are functions of original outputs and internal states and defined such that the dynamics of agents a...

Multi-Input and Multi-Output Nonlinear Systems: Interconnected Chua's Circuits

In this paper, a class of MIMO nonlinear systems are studied. Some frequency domain conditions are established for the property of dichotomy. These kinds of systems can also be viewed as a class of interconnected systems composed of SISO systems through some linear and nonlinear interconnections. A class of nonlinear input and output interconnections are presented. The corresponding condition f...

Disturbance decoupling of multi-input multi-output discrete-time nonlinear systems by static measurement feedback

This paper addresses the disturbance decoupling problem (DDP) for nonlinear systems, extending the results for continuous-time systems into the discrete-time case. Sufficient conditions are given for the solvability of the problem. The notion of the rank of a one-form is used to find the static measurement feedback that solves the DDP whenever possible. Moreover, necessary and sufficient condit...