Output feedback controller realizations for open-loop stable nonlinear processes

1992 ◽  
Author(s):  
Costas Kravaris ◽  
Prodromos Daoutidis
Keyword(s):  
Output Feedback ◽  
Open Loop ◽  
Feedback Controller ◽  
Nonlinear Processes ◽  
Output Feedback Controller

scholarly journals A Simplified Output Feedback Controller for the DC-DC Boost Power Converter

Electronics ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 493
Author(s):  
Satyajit Chincholkar ◽  
Wentao Jiang ◽  
Chok-You Chan ◽  
Shriram S. Rangarajan
Keyword(s):  
Output Feedback ◽  
Output Voltage ◽  
Basic Structure ◽  
Power Converter ◽  
Open Loop ◽  
Current Control ◽  
Feedback Controller ◽  
Control Signal ◽  
Loop Control ◽  
Output Feedback Controller

Boost-type dc-dc converters present non-minimum phase dynamic system characteristics. Therefore, controller design using only the output voltage for feedback purposes is not a very straightforward task. Even though output voltage control can be achieved using inductor current control, the implementation of such current-mode controllers may require prior knowledge of the load resistance and also demand more states such as one or more currents in feedback. In this paper, the development of a new output feedback controller for boost-type dc-dc converters is presented. The controller form is such that it avoids the possibility of saturation in the control signal due to division by zero. The basic structure of the proposed controller is firstly obtained from the expression of the open-loop control signal, and the complete controller structure is then derived to satisfy the closed-loop stability conditions. Simulation and experimental results clearly verify the ability of the control law to provide robust regulation against parameter variations.

Robust H2 Output Feedback Controller Design for Damping Power System Oscillations

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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