Topic
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.
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TL;DR: In this article, a new optimal hybrid control approach called Optimal General Type II Fuzzy Sliding Mode (OGT2FSM) is presented, which not only warranties the constancy and hardiness against uncertainties of the lumped resulted by external disturbances and unmodeled dynamics, but also considerably decreases the control chattering inherent in traditional sliding mode control.
Abstract: In current study, in order to find the control of general uncertain nonlinear systems, a new optimal hybrid control approach called Optimal General Type II Fuzzy Sliding Mode (OGT2FSM) is presented. In order to estimate unknown nonlinear activities in monitoring dynamic uncertainties, the benefits of general type-2 fuzzy logic systems (GT2FLS) is utilized by the suggested controller. The suggested controller not only warranties the constancy and hardiness against uncertainties of the lumped resulted by external disturbances and un-modeled dynamics, but also considerably decreases the control chattering inherent in traditional sliding mode control. Moreover, the Modified Backtracking Search Algorithm (MBSA), which is a new heuristic algorithm, is used in the offered controller. A comparison is performed between the results of current study and the results of some of the most recent studies on the same topic, which are an Adaptive Interval Type-2 Fuzzy Logic Controller (AGT2FLC) and Conventional Sliding Mode Controller (CSMC), to assess the efficiency of the suggested controller. The suggested control scheme is finally used to the Electric Vehicles type as a case study. Results of simulation confirm the good performance the suggested controller.
65 citations
10 Dec 2002
TL;DR: In this article, a phase-stabilized servo controller based on a Nyquist plot for moving-suspension dual-stage actuators was developed, which uses the suspension resonances of a PZT microactuator to compensate for the track misregistration due to windage disturbance caused by suspension vibration.
Abstract: A phase-stabilized servo controller was developed based on a Nyquist plot for moving-suspension dual-stage actuators. The controller uses the suspension resonances of a PZT microactuator to compensate for the track misregistration (TMR) due to windage disturbance caused by suspension vibration. Experimental results obtained using a prototype 3.5-in hard disk drive show that the crossover frequency of the open loop is 2.0 kHz, and that the root mean square of the TMR due to windage disturbance is reduced by 23% compared to that of a conventional notch-based dual-stage controller.
65 citations
TL;DR: In this article, a PID pitch angle controller for a fixed speed active-stall wind turbine, using the root locus method, is proposed to enable the wind turbine to perform power system stabilisation.
65 citations
TL;DR: In this article, a robust controller is presented that compensates for both types of uncertainties; the full mechanical and electrical dynamics of the turbine are considered These dynamics require acceleration of the rotor to provide feedback information which is not available in sufficiently accurate form during practice.
65 citations
TL;DR: In this article, a multi-input-multi-output (MIMO) model predictive control (MPC) was proposed for a direct expansion (DX) air conditioning (A/C) system to improve both indoor thermal comfort and air quality, whereas the energy consumption is minimized.
65 citations