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novel-control-scheme
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Voltage regulation through smart utilization of potential reactive power resources
, Article Proceedings - UKSim 5th European Modelling Symposium on Computer Modelling and Simulation, EMS 2011, 16 November 2011 through 18 November 2011, Madrid ; 2011 , Pages 293-298 ; 9780769546193 (ISBN) ; Abbaspour Tehrani Fard, A ; Dobakhshari, A. S ; Ranjbar, A. M ; Sharif University of Technology
Abstract
The introduction of demand response concept, in addition to increment of penetration of distributed generation (DG) based on renewable energies, make opportunities for the novel control schemes to be integrated in power system on a smart grid framework. Voltage control methods in power systems needs proper coordination among reactive power resources and conventional volt/var control equipments. In this work, potential reactive power resources are investigated and then, reactive power output of renewable DG units and controllable loads along with operation of conventional voltage controllers are optimized using a centralized control scheme. Considering the variability of demand and...
Novel nested saturated feedback scheme for CLOS guidance via cubature Kalman filter
, Article 25th Saint Petersburg International Conference on Integrated Navigation Systems, ICINS 2018, 28 May 2018 through 30 May 2018 ; 2018 , Pages 1-6 ; 9785919950578 (ISBN) ; Haeri, M ; American Institute of Aeronautics and Astronautics (AIAA); et al.; Institute of Electrical and Electronics Engineers - Aerospace and Electronic Systems Society (IEEE AESS); International Public Association - Academy of Navigation and Motion Control (ANMC); National Research University ITMO; Russian Foundation for Basic Research ; Sharif University of Technology
Institute of Electrical and Electronics Engineers Inc
2018
Abstract
To achieve an exact three-dimensional command to line of sight (CLOS) guidance law, a novel control scheme comprising feed-forward terms (to exactly compensate known kinematics) accompanied by an adaptive nested saturated feedback strategy is presented. A square-root cubature Kalman filter is designed as the CLOS non-linear guidance filter. Performance of the proposed guidance law is compared with the augmented proportional navigation (APN), at the absence and presence of target maneuvers, autopilot dynamics and non-ideal tracking filter. Simulation results demonstrate the satisfactory performance of proposed strategy. © 2018 Concern CSRI Elektropribor, JSC
Adaptive fuzzy Jacobian control of spacecraft combined attitude and Sun tracking system
, Article Aircraft Engineering and Aerospace Technology ; Volume 93, Issue 1 , 2021 , Pages 1-14 ; 17488842 (ISSN) ; Varatharajoo, R ; Assadian, N ; Sharif University of Technology
Emerald Group Holdings Ltd
2021
Abstract
Purpose: The paper aims to address the combined attitude control and Sun tracking problem in a flexible spacecraft in the presence of external and internal disturbances. The attitude stabilization of a flexible satellite is generally a challenging control problem, because of the facts that satellite kinematic and dynamic equations are inherently nonlinear, the rigid–flexible coupling dynamical effect, as well as the uncertainty that arises from the effect of actuator anomalies. Design/methodology/approach: To deal with these issues in the combined attitude and Sun tracking system, a novel control scheme is proposed based on the adaptive fuzzy Jacobian approach. The augmented spacecraft model...