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In this paper, the traction system modeling of a commercial electric car is studied. Experimental data acquired during an on-road test drive are used to determine an efficiency map of the traction system. Using the deduced model, simulation results are compared to experimental results. The simulation tool using the proposed efficiency map method yields less than 5 % error on energy consumption compared...
In this paper the drive control of a commercial Electric Vehicle (EV) equipped with a low power Range Extender (RE) Fuel Cell (FC) system is studied. By using backstepping control, the drive control of the RE-EV is deduced and compared to the Inversion Based-Control deduced from its Energetic Macroscopic Representation. From the modelling, the backstepping defines the control structure and ensures...
Nonlinear controller tuning with anti-windup is not trivial since the parameters within the structure are interdependent. A global optimization-based tuning approach can handle this interdependence. A hybrid Ant Colony Optimization (ACO) and Nelder-Mead (NM) algorithm for controller and anti-windup tuning efficiently solves this problem. This paper proposes a new way to constrain ACO-NM algorithm...
In this work, a fuzzy logic control system is proposed for PMSMs without knowledge of the machine's parameters. The scheme consists of two adaptive fuzzy controllers, respectively for velocity and direct current control. The control scheme stability is proven by the Lyapunov stability theory and its performance is validated through a set of simulations on an experimentally validated PMSM model. The...
In this paper, a supervisory energy management strategy is presented for multiple battery units. The use of several energy storage devices such as batteries makes their maintenance costly and management a difficult task to undertake. The proposed supervisory approach aims to equilibrate the state of charge (SOC) and hence energy usage, which extends the life of batteries and reduces their heavy maintenance...
In this paper, an observer-based adaptive control strategy is presented for permanent magnet synchronous machines (PMSMs). The adaptive control scheme achieves accurate tracking using the machine's inverse dynamics and an observer to approximate disturbance and speed used as feedback. The adaptive controller is validated through a set of simulations. Results show high speed tracking and estimation...
The well-known Brocket's theorem revealed that nonholonomic systems, hopping robots, for example, can not be stabilized by smooth time-invariant state feedback controllers. In this manuscript, we propose a linear time-varying state feedback controller for stabilizing a nonholonomic hopping robot during flight mode in finite time. The current approach is novel in the sense that we modify the Pontryagin's...
Postinfarction remodeling is accompanied and influenced by perturbations in MAPK signaling. The Growth arrest and DNA-damage-inducible 45 (Gadd45) proteins are small acidic proteins involved in DNA repair and modulation of MAPK activities. Despite its relationship with p38 MAPK, little is known about the role of Gadd45 in the heart. Our aim is to explore the potential contribution of Gadd45 gamma...
Ischemia/reperfusion is accompanied and influenced by perturbations of the beta adrenergic receptor pathway and act through diverse signaling cascades to modulate cardiac function and remodelling. The Epac-Rap signaling pathway is a potent regulator of Ca(2+) cycling, cardiac hypertrophy, fibrosis. However, their role in determining cell death in the heart remains underexplored. Our aim is to better...
High performance motor controllers usually require complex operations and long computation time, which makes the implementation task more complex. FPGA (Field Programmable Gate Array) implementation of controllers, including intelligent controllers, has many advantages: reprogrammable, convenient software tools, high efficiency and very high significant integration density. This paper presents implementation...
Optimal controller and anti-windup tuning for motion systems with flexible coupling and cascaded loops control structure is a practical and difficult problem, in particular when time scale separation is insufficient. An Ant Colony Optimization (ACO) based methodology for global off-line tuning of Proportional-Integral-Derivative (PID) controllers with anti-windup can be used at the expense of excessive...
A hybrid control system for PMSM that requires rough knowledge of the machine's quadrature inductance only is proposed. The scheme consists of an adaptive fuzzy speed controller and a sliding mode current controller. Lyapunov stability conditions are used to design the controllers that result into low sensitivity to torque disturbances and parameter variations.
Many types of materials are manufactured or processed in the form of a sheet or a web (textile, paper, metal, etc.), which then couples the processing rolls and the associated motor drives. In Winding and web transport systems, the main concern is to control independently speed and tension in spite of disturbances such as radius variations and changes of set point, and to the coupling introduced by...
In this paper, a sensorless artificial neural network (ANN) speed control strategy of permanent magnet synchronous machines (PMSMs) is introduced as an alternative to conventional control techniques. The control strategy achieves accurate tracking by making use of ANN's learning capabilities to approximate the machine's nonlinear dynamics. On the other hand, an ANN-based observer is used to estimate...
Analyzing hourly ozone data from 214 European background sites over the time period 2000–2010, we demonstrated for the first time that the ozone control measures are effective at rural sites, while ozone concentrations are still increasing in the cities. The Western European Mediterranean basin is expected to be more strongly affected by climate change, including ozone pollution, than most of the...
The paper presents a control design oriented simulation model of a multi-stack Fuel Cell System (FCS). The aim of such a system is to improve performance, reliability and system integration versus a common single stack FCS. This paper is based on Energetic Macroscopic Representation principles and on preliminary works on FCS modeling and simulation. This paper shows the development of a complete multi-stack...
Ant Colony Optimization allows simultaneous tuning of a large number of control parameters and provides flexibility in the choice of the performance criterion. An off-line tuning methodology is proposed for PID-type controllers and their associated anti-windup subsystem for cascaded loop control structures. Insight is given on the design process, on parameter setting and on handling of soft and hard...
This paper introduces a simple adaptive control scheme for permanent magnet synchronous machines (PMSMs) as an alternative to classical control techniques. Unlike many adaptive controllers, the proposed strategy achieves tracking with a single adaptive parameter and with no currents loop regulation which yields reduced complexity. The control scheme is validated through a set of simulations on an...
In this paper, we propose an adaptive friction compensation strategy for flexible-joint robotic manipulators, taking into account Coulomb friction for the actuator and the load. For such systems, the exact inverse model is unrealizable and only an approximation can be found. The proposed adaptive control strategy consists of a rigid-based linear in parameter feedforward model that approximates the...
High performance motor controllers usually require complex operations and long computation time, which makes the implementation task more complex. The PWM signal generator is a key element in ac drives. This paper presents implementation on FPGA of a Space Vector Pulse Width Modulation (SVPWM) using Hardware Description Language VHDL and its co-simulation with Simulink™/Matlab®. The synthesis results...
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