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The objective of the Holistic Corner Control (HCC) is to keep the vehicle on a target path by minimizing the error between the actual and target center of gravity (CG) forces and moment. A real time optimization procedure has been proposed in order to calculate the necessary tire force adjustments to minimize the error and to give the driver a normal driving feel even though the road conditions differ...
We are developing a series of systems science-based clinical tools that will assist in modeling, diagnosing, and quantifying postural control deficits in human subjects. In line with this goal, we have designed and constructed an experimental device and associated experimental task for identification of the human postural control system. In this work, we present a Quadratic Programming (QP) technique...
This paper proposes an independent control of two induction motors fed nine switches inverter. In this context, an adaptive direct torque control is developed to ensure the separate control of the both induction motors. Simulations are carried-out on induction motors, to show that the developed independent control is effective and provides a simple configuration with high performance in terms of speed...
Due to control simplicity and easy applicability DTC has become popular and adopted in many industrial applications. But it still suffers from a few drawbacks like- comparatively large torque ripple in a low speed range and its performance is highly depended on speed of the motor and hysteresis bands of torque and flux ripple. To address these problems, this paper represents a direct torque control...
This paper describes a control mode transition method between Speed Closed Loop control modes based on Voltage Vector Control (VVC-SCL) and torque control mode based on Torque Control with Speed Feedback (TCSF), which was proposed for applying in medium dynamic applications. In order to describe conveniently, the principle of VVC-SCL and TCSF are introduced in brief first. The relationship between...
In order to get better performance at different speed regions in Direct Torque Control (DTC) for induction motor system, a speed adaptive strategy combining two control models are established—hexagon flux linkage control model and SVM-DTC control model. The new method takes full advantage of two models and makes a transition between them according to rotor speed. According to the result analysis and...
The operation of variable speed ac drives with loss-minimizing flux strategies can produce important energy savings. This paper proposes algorithms for the evaluation of loss power components, and the flux level that produces minimum loss operating condition, covering the whole constant torque operating region. Both scalar and vector drives are considered, although it is found that the operation of...
This paper presents a simple fault detection method and fault-tolerant strategy based on the model predictive control theory. The proposed fault detection method can detect and locate a failed switch with current error signals dedicated to each switch, based on the position of space vectors. Following the fault detection, the proposed fault-tolerant control strategies are developed to produce three-phase...
The paper deals with design and simulation of 2-phase direct torque controlled induction motor (IM) drive using space-vector modulation (SVPWM). The IM drive is supplied 2-phase full bridge inverter. The control system uses direct torque control method with PI controllers of torque and flux denoting by reduced torque ripple. Simulation results in both motoring and regenerating modes are given in the...
This paper describes and investigates different dynamic overmodulation strategies applied to highly dynamic current control of interior permanent magnet synchronous machines. Although the machine is highly utilized, which indicates significant saturation characteristics, a linearized PI-Controller with excellent dynamic performance is used. The impact of voltage limitation with use of overmodulation...
A new hybrid position sensorless control method for reluctance synchronous machine drives is presented in this paper. The active-flux and arbitrary injection position estimation techniques are combined for the first time in this hybrid controller. The controller switches between estimation techniques depending on speed and load. A hysteresis region is implemented with phase-locked loop synchronisation...
A comparison between two-phase-on (2PO) and three-phase-on operation (3PO) for Three-phase Brushless DC machines (BLDCs) is presented in this paper. It aims to highlight the different BLDC exploitation achievable by means of 3PO compared to that obtainable by 2PO. For this purpose, two different control strategies are considered, i.e. a traditional 2PO-based and a 3PO-based, whose main details are...
An essential control objective of wind energy conversion systems (WECSs) is to maximize the conversion of wind energy into electrical energy. This control objective is difficult to achieve using linear control techniques because the WECSs are time-varying and highly nonlinear. In this paper, we propose a nonlinear fuzzy adaptive output feedback control strategy to achieve the optimum wind power extraction...
We present a numerical investigation of the performance of retrospective cost adaptive control (RCAC) for spacecraft attitude control using control-moment-gyroscopes (CMG). The setup consists of three orthogonally mounted CMG's that are velocity commanded without the use of a steering law. RCAC is applied in a decentralized architecture; each CMG is commanded by an independent RCAC control laws. This...
This paper considers the integrated control for driver assistance during lane keeping and obstacle avoidance maneuver. The proposed approach handles the driver activity, namely the torque, in order to provide progressive assistance intrusion. The design method allows addressing both underloaded and obverloaded situations. The model formulation uses the Takagi-Sugeno formalism which allows a design...
This paper proposes the Bacterial Foraging Optimization (BFO)-based tuning of controllers for a pancake DC torque motor in the framework of a Diesel engine exhaust gas recirculation valve as a representative automotive torque motor actuator. The validation of the position of bacteria only if the control system response is in a valid range is inserted in the BFO algorithm. PID and sliding mode controllers...
This paper establishes the vector control of a five phase permanent magnet synchronous motor (PMSM). First, the mathematical model of a five-phase PMSM is described in a decoupled space with two orthogonal components. Next, space vector modulation (SVM) algorithm is presented to obtain high performance vector control drive. The vector control principle of a five-phase PMSM is developed to prove the...
This paper presents the direct-torque control of a permanent magnet synchronous motor using four-switch three-phase inverter. The control of the four-switch inverter was developed based upon the orientation of four-switch space-vectors in the plane of six-switch inverter. The proposed inverter was successfully used in the direct-torque control of a PMSM. A dynamic model of a machine gives deep insight...
This paper deals with field-oriented control (FOC) and vector control (VC) of a promising brushless doubly-fed reluctance generator (BDFRG) technology for large-scale wind turbines. The BDFRG has been receiving increasing attention because of the low operation & maintenance costs afforded by the use of partially-rated power electronics, and the high reliability of brushless construction, while...
A Furuta pendulum is a two degrees-of-freedom mechanism consisting of an arm rotating in the horizontal plane and a pendulum rotating in the vertical plane. The pendulum is attached to the arm tip. The complexity in the control of this system relies on that only the arm is actuated. The problem addressed in this paper consists in the design of a controller such that the difference between the desired...
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