An exact tracking error dynamics passive output feedback controller for a Buck-Boost-converter driven DC motor

This paper presents a state feedback discrete variable structure controller for robust tracking of linear multivariable systems with unmatched, additive uncertainties. Extension of the controller to output feedback using a prediction observer with bias estimation is also given. It is shown that the state feedback controller guarantees attractiveness and invariance of a boundary layer, while the output feedback controller does so after a transient. Unlike existing schemes, the controllers utilize a single sliding hyperplane regardless of the number of inputs. This attribute enables the development of a procedure that admits, under minor restrictions, direct application of well-established linear control strategies in the design of tracking error dynamics. A numerical example is used to illustrate the proposed controllers. [S0022-0434(00)01904-3]

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Finite-Time Output Feedback Control for a Rigid Hydraulic Manipulator System

Mathematical Problems in Engineering ◽

10.1155/2018/9316562 ◽

2018 ◽

Vol 2018 ◽

pp. 1-9

Author(s):

Yong-Sheng Hao ◽

Zhi-Gang Su ◽

Xiangyu Wang

Keyword(s):

Output Feedback ◽

Finite Time ◽

Tracking Error ◽

Output Feedback Control ◽

Feedback Controller ◽

Finite Time Stability ◽

Output Feedback Controller ◽

Analysis Process ◽

Error System ◽

Hydraulic Manipulator

The position tracking control problem of a hydraulic manipulator system is investigated. By utilizing homogeneity theory, a finite-time output feedback controller is designed. Firstly, a finite-time state feedback controller is developed based on homogeneity theory. Secondly, a nonlinear state observer is designed to estimate the manipulator’s velocity. A rigorous analysis process is presented to demonstrate the observer’s finite-time stability. Finally, the corresponding output feedback tracking controller is derived, which stabilizes the tracking error system in finite time. Simulations demonstrate the effectiveness of the designed finite-time output feedback controller.

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Approximation-Free Output-Feedback Non-Backstepping Controller for Uncertain SISO Nonautonomous Nonlinear Pure-Feedback Systems

Mathematics ◽

10.3390/math7050456 ◽

2019 ◽

Vol 7 (5) ◽

pp. 456 ◽

Cited By ~ 2

Author(s):

Jang-Hyun Park ◽

Tae-Sik Park ◽

Seong-Hwan Kim

Keyword(s):

Output Feedback ◽

Finite Time ◽

Sliding Mode ◽

Tracking Error ◽

Feedback Controller ◽

Feedback Systems ◽

Fuzzy Logic Systems ◽

Output Feedback Controller ◽

Control Scheme ◽

Exponentially Stable

A novel differentiator-based approximation-free output-feedback controller for uncertain nonautonomous nonlinear pure-feedback systems is proposed. Using high-order sliding mode observer, which is a finite-time exact differentiator, the time-derivatives of the signal generated using tracking error and filtered input are directly estimated. As a result, the proposed non-backstepping control law and stability analysis are drastically simple. The tracking error vector is guaranteed to be exponentially stable in finite time regardless of the nonautonomous property in the considered system. It does not require neural networks or fuzzy logic systems, which are typically adopted to capture unstructured uncertainties intrinsic in the controlled system. As far as the authors know, there are no research results on the output-feedback controller for the uncertain nonautonomous pure-feedback nonlinear systems. The results of the simulation show clearly the performance and compactness of the control scheme proposed.

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Output feedback controller realizations for open-loop stable nonlinear processes

1992 American Control Conference ◽

10.23919/acc.1992.4792610 ◽

1992 ◽

Cited By ~ 3

Author(s):

Costas Kravaris ◽

Prodromos Daoutidis

Keyword(s):

Output Feedback ◽

Open Loop ◽

Feedback Controller ◽

Nonlinear Processes ◽

Output Feedback Controller

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Robust H2 Output Feedback Controller Design for Damping Power System Oscillations

International Journal of Emerging Research in Management and Technology ◽

10.23956/ijermt.v6i10.62 ◽

2017 ◽

Vol 6 (10) ◽

pp. 8

Author(s):

Kho Hie Kwee ◽

Hardiansyah .

Keyword(s):

Power System ◽

Output Feedback ◽

Controller Design ◽

Sufficient Conditions ◽

Feedback Controller ◽

Linear Matrix ◽

Parameter Uncertainties ◽

Worst Case ◽

Output Feedback Controller ◽

Power System Oscillations

This paper addresses the design problem of robust H2 output feedback controller design for damping power system oscillations. Sufficient conditions for the existence of output feedback controllers with norm-bounded parameter uncertainties are given in terms of linear matrix inequalities (LMIs). Furthermore, a convex optimization problem with LMI constraints is formulated to design the output feedback controller which minimizes an upper bound on the worst-case H2 norm for a range of admissible plant perturbations. The technique is illustrated with applications to the design of stabilizer for a single-machine infinite-bus (SMIB) power system. The LMI based control ensures adequate damping for widely varying system operating.

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