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Open-loop controller

About: Open-loop controller is a research topic. Over the lifetime, 16148 publications have been published within this topic receiving 224014 citations. The topic is also known as: non-feedback controller & open-loop control law.


Papers
More filters
Journal ArticleDOI
TL;DR: The type-2 fuzzy logic system (T2FLS) controller using the feedback error learning (FEL) strategy has been proposed for load frequency control (LFC) in the restructure power system to improve the performance of the FEL strategy.

61 citations

Journal ArticleDOI
TL;DR: A Lyapunov based-boundary feedback controller for achieving mixing in a three-dimensional pipe flow governed by Navier-Stokes equations is designed and a form of detectability of mixing in the interior of the pipe from the chosen outputs on the wall is shown.
Abstract: We design a Lyapunov based-boundary feedback controller for achieving mixing in a three-dimensional (3-D) pipe flow governed by Navier-Stokes equations. We show that the control law maximizes a measure related to mixing (that incorporates stretching and folding of material elements), while at the same time minimizing the control effort and the sensing effort. The penalty on sensing results in a static output-feedback control law (rather than full-state feedback). We also derive a lower bound on the gain from the control effort to the mixing measure. Furthermore, we establish input-output-to-state-stability properties for the open-loop system. These results show a form of detectability of mixing in the interior of the pipe from the chosen outputs on the wall. The effectiveness of the optimal control in achieving mixing enhancement is demonstrated in numerical simulations.

61 citations

Journal ArticleDOI
TL;DR: In this paper, a closed-loop current controller for the CSI-fed ac machine drive system is proposed and implemented using different decoupling method. But, the performance of the proposed closed loop current controller was not evaluated.
Abstract: A current source inverter (CSI) requires a capacitor filter for the commutation of switching device as well as for attenuating switching harmonics. Hence, the CSI-fed ac machine has a second-order system in the continuous time domain. This paper presents a design methodology for the closed-loop current controller of the CSI-fed ac machine drive system. A multiloop current controller design using a pole/zero cancellation method is employed with a transfer function matrix. To decouple the cross-coupling terms which cause mutual interferences between the d- and q-axes in the synchronous reference frame, two types of controller are proposed and implemented using different decoupling method. Additionally, active damping methods are incorporated to enhance the stability of the system. A stability analysis in discrete-time domain is investigated to verify the feasibility of the proposed closed-loop current controller. To evaluate the effectiveness of the proposed current controller, computer simulations and experimental tests were performed and the results are discussed.

61 citations

Journal ArticleDOI
TL;DR: It is shown that the designed decentralized continuous adaptive controller makes the solutions of the closed-loop system exponentially convergent to a ball, which can be rendered arbitrary small by adjusting design parameters.

61 citations

Patent
29 Oct 1984
TL;DR: In this article, a modular self-diagnostic mass-flow controller and system includes separable and readily interchangeable housing portions cooperative to provide mass flow controller component repair and replacement without further system disconnection.
Abstract: A modular, self-diagnostic mass-flow controller and system includes separable and readily interchangeable housing portions cooperative to provide mass-flow controller component repair and replacement without further system disconnection. The mass-flow controller includes dual mass-flow sensors and associated electronics including a processor operative in response to the dual mass-flow sensor and other signals to both provide mass-flow control of a controlled gas and self-diagnostics to ensure that the controller is operating in its intended manner.

61 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202371
2022124
202167
202079
201998
2018155