Hovering control of a quadrotor system by a reduced-order observer-based output feedback controller

This paper considers the problem of global output feedback control for a class of nonlinear systems with inverse dynamics. The main contribution of paper is that: For the inverse dynamics with uncertain ISS/iISS supply rates, and the systems being disturbed by L2 noises, we construct a reduced-order observer-based output feedback controller, which drives the output of system to zero and maintain other closed-loop signals bounded. Finally, a simulation example shows the effectiveness of the control scheme.

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Modal Testing and Suboptimal Vibration Control of Flexible Rotor Bearing System by Using a Magnetic Bearing

Journal of Dynamic Systems Measurement and Control ◽

10.1115/1.2896521 ◽

1992 ◽

Vol 114 (2) ◽

pp. 244-252 ◽

Cited By ~ 19

Author(s):

Chong-Won Lee ◽

Jong-Sun Kim

Keyword(s):

Output Feedback ◽

Magnetic Bearing ◽

Feedback Controller ◽

Reduced Order Model ◽

Flexible Rotor ◽

Order Model ◽

Reduced Order ◽

Output Feedback Controller ◽

Rotor Bearing ◽

Bearing System

A suboptimal output feedback controller is designed based on a reduced order model and applied to a flexible rotor bearing system in order to control the unstable or lightly damped vibrations occurring during operation. The reduced order model is a truncated modal equation of the distributed parameter system obtained through the singular perturbation. The instability problem arising from the spillover effects caused by the uncontrolled high frequency modes is prevented through the constrained optimization by incorporating the spillover term into the performance index. The application of the matrix minimum principle yields a set of matrix equation similar to the unconstrained output feedback controller. The efficiency of the proposed method is demonstrated experimentally with a flexible rotor by using a magnetic bearing.

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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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