Topic
Proportional control
About: Proportional control is a research topic. Over the lifetime, 3756 publications have been published within this topic receiving 49050 citations.
Papers published on a yearly basis
Papers
More filters
01 Dec 2006
TL;DR: In this article, an electric servomotor is used as a governor for a micro hydropower power plant especially those plants that are operated in isolated mode, where the control action can be split up into linear and non-linear parts.
Abstract: Micro hydropower plants are emerging as a major renewable energy resource today as they do not encounter the problems of population displacement and environmental problems associated with the large hydro power plants. However, they require control systems to limit the huge variation in input flows expected in rivulets over which these are established to produce a constant power supply. This paper proposes an electric servomotor as a governor for a micro hydro power plant especially those plants that are operated in isolated mode. An advanced controller is developed combining four control schemes for the control of the governor following the concept that the control action can be split up into linear and non linear parts. The linear part of this controller contains an adaptive fast transversal filter (FTF) algorithm and normalized LMS (nLMS) algorithm. The non-linear part of the controller incorporates fuzzy PI and a neural network. The new controller has a superior performance over other control schemes.
29 citations
TL;DR: In this article, an equivalent switch circuit model for the converter is established based on the external circuit characteristic, and a simple proportional resonant control strategy for the model is also proposed.
Abstract: This paper studies the modeling and control for a triple line-voltage cascaded voltage-source converter. The unbalanced current of each cascaded unit results in complicated control algorithm and structure due to its structural characteristic, and there exists a double-frequency fluctuation for each dc-capacitor voltage. To solve the aforementioned problems, an equivalent switch circuit model for the converter is established in this paper based on the external circuit characteristic, and a simple proportional resonant control strategy for the model is also proposed. The technique realizes the power factor regulation and the balanced stable transmission of the converter power in a two-phase stationary frame. And by adding an ac-side voltage compensation control for each converter, the double-frequency fluctuation of each dc-link voltage is effectively restrained. Besides, the strategy adopts a carrier phase-shifting space vector pulsewidth modulation suitable for the structural characteristics, which effectively simplifies the modulation algorithm. The proposed strategy has such advantages as less hardware and computation, simpler control structure, better dynamic and static performance, and better robustness. The experimental results have verified the feasibility and availability of the proposed model and its control method.
29 citations
TL;DR: A segmented predict negative feedback control method, based on the advance proportional control one, is proposed and verified by experiments to overcome the shortcomings of PID temperature control and demonstrate that the optimal output performance of PEMFC can be realized.
29 citations
DOI•
01 Sep 1983TL;DR: Davison's robust, multivariable, feedback-feedforward controller was applied to the control of a pilot-scale binary distillation column, as a master loop in a cascaded configuration.
Abstract: Davison's robust, multivariable, feedback-feedforward controller (DAVISON, E.J.: IEEE Trans., 1976, AC-21, pp. 35?47) is applied to the control of a pilot-scale binary distillation column, as a master loop in a cascaded configuration. The inner or slave loop consists of the original plant with multiloop proportional control. This cascaded configuration is shown to have a number of advantages for practical implementation. The performance of the controller is evaluated by experimental application to a computer-controlled distillation column. The robust controller gives improved control performance compared to that achieved using conventional multiloop proportional plus integral plus derivative (PID) control.
29 citations
24 Apr 1988
TL;DR: A hybrid position/force control algorithm was implemented on a PUMA 600 series robot and several programs were written to show various force and position tracking abilities.
Abstract: A hybrid position/force control algorithm was implemented on a PUMA 600 series robot. Multiple processors were used to increase the sampling frequency of the control algorithm. The force control algorithm used the hand Jacobian and hand frame force measurement fingers mounted in a gripper to control the forces and moments applied by the end effector. The position control algorithm used the Lagrange-Euler formulation of the dynamics of the arm to control the joint space trajectory of the arm. The algorithms' performance was evaluated using a proportional controller for the force control half and a proportional-derivative controller for the position control half. Several programs were written to show various force and position tracking abilities. >
29 citations