... mathematical model for the VCS with electromagneticdrive and power converter controlcircuitsfor its optimal control DESPOTOVIC´AND STOJILJKOVIC´: POWER CONVERTER CONTROLCIRCUITSFOR TWO-MASS ... mentioned facts were motivation for mathemat-ical model formulation and for further research of both thephase angle control and switch mode control behavior for theelectromagnetic vibratory ... voltage controlled os-cillator and controller output. This reference value is determi-nated by reference inputs, for amplitude and duration and for frequency. Both of these signals are controlled...
... characteristics. Two control loops: inner feed forward current control loop and outer voltage control closed loop are applied for the non-inverting buck-boost converter. The performance of the ... Aero dynamical / Mechanical unitMPPTLPPTOperatorControllerspeedd Control strategyVSWT Control unitVSWT Electrical unit Fig. 1. Control concept of VSWT with non-inverting buck-boost ... curve at 80%LPP curve at 70%LPP curve at 50%Region of LPPT control Region of MPPT control Power [W] Fig. 6. Regions of MPP and LPP control. T12-122 Over again, the switch logic algorithm...
... previously described current control techniques for the active filter. The controllers include the implementationof all the aforementioned refinements, so that the achievedperformance is, as realistically ... (PLL) control or by a feedforward action operatingon the control thresholds [29]–[31]. Fig. 3 shows the sim-plified scheme of the implementation of such a controller.As can be seen, the controller ... the achievable performance on the slope of the currentreference.The improvements in the control techniques result in rathersatisfactory performance levels for all three controllers. How-ever,...
... FL controller, (b) control surface of con-ventional PI controller, (c) control surface of FL controller; comparison ofcurrent-tracking performance with PI and FL controller: (d) current waveform,and ... Therefore,feedforward signals for the referenceand disturbanceinputs are added to the feedback control law.Because the control algorithm guarantees the dynamicallycorrect compensation for ... Optimal (mode) discrete modulation controller for RDCLconverter. (b) NN discrete modulation controller for RDCL converter.performance of such an off-line trained NN controller dependsupon the amount...
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... response for small exogenous signals (reference commands and disturbances).One way to design controllers for systems with bounded controls, would be to solve anoptimal control ... closed loop control system were studied extensively. In the presence ofsaturations the performance of a linear control system can suffer. For example, a linear control system ... investigation was made on the effects on performance of the reset windups for MIMO systems [11] showing potential for improving the performance of the system. A simplecase study...
... 6.10 Precautions for start/stop control of AC drives 166 6.11 Control wiring for VSDS 169 6.12 Commissioning VSDs 170 7 Troubleshooting controlcircuits 173 7.1 Basic controlcircuits 173 7.2 ... Electrical Equipment and ControlCircuits Figure 2.8 Power and control circuit for an inverter drive Devices, symbols, and circuits 27 A few simple controlcircuits are shown in ... ladder logic instructions for simple controlcircuits (AND, OR, AND with OR) are shown in Figure 2.12. Figure 2.12 Examples of ladder logic instructions for simple controlcircuits 2.4.7 The...
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... sametime the situation for the output current controller is as inthe example above, only mode 14 satisfies both controllerssimultaneously.This results in two direct controllers for both outputcurrent ... basics of Direct Torque Control, Direct Current Control and Sliding Mode Control of matrix converters. I. INTRODUCTIONIn recent years many research results on control methods for matrix converters ... closed loop control of a drive system consisting of matrix converterand induction machine. Slip control and field oriented control are the basic methods applied for closed loop control [4]....
... writing of the book. Most of the circuits developments were per-formed when I was with the Institute of Neuroinformatics, Zăurich Switzerland. My thanks OUTLINE FOR A VISUAL MOTION PERCEPTION ... from sustainable forestryin which at least two trees are planted for each one used for paper production. viii CONTENTS4.1.3 Smoothnessandsparsedata 514.1.4 Probabilistic formulation . . . ... the relevant information.This includes tasks such as object recognition, coordinate transformation, motion estima-tion, and so forth. Perception is the interpretation of sensory information with...
... challenging the participant. Adaptive controllerswith forgetting factors were recently proposed [50,94] inorder to systematically reduce a feedforward assistive force for reaching when tracking errors ... low-level force control also, for example, in control of pneumatic[21,22,27] and cable-based actuators [8,14,18,19,26,32-35], but these advances are not the focus of this article.Assistive controllersActive ... ofposition feedback for providing assistance. More recentcontrollers have used more sophisticated forms ofmechanical impedance than stiffness, including for exam-ple viscous force fields [71,77],...