Interest is apparently growing in the four-switch noninverting Buck-Boost converter, which can be effectively used as a power supply for mobile devices. A typical application is a dynamic power supply for third-genera...
详细信息
Interest is apparently growing in the four-switch noninverting Buck-Boost converter, which can be effectively used as a power supply for mobile devices. A typical application is a dynamic power supply for third-generation (3G) Wideband Code Division Multiple Access (WCDMA) Power Amplifiers (PA). While several control strategies based on the linear controltheory have been proposed recently, there is still room for investigation of nonlinearcontrol techniques. In this paper, a fixed-frequency nonlinearcontroller based on the sliding mode theory is presented and compared to a classical linear Proportional-Integral-Derivative (PID) implementation. The main differences from the design perspective and in terms of performance are then pointed out and commented. The main advantages of the proposed technique generally include an improvement of the dynamic performance and increased energy efficiency of the conversion. Simulation results are provided in order to evaluate and compare the different control strategies.
A semi-globally convergent nonlinearobserver is proposed for bounded-state nonlinear systems subject to state-delay nonlinearities. The proposed design can be seen as an extension of the results given in [1]. In the ...
详细信息
ISBN:
(纸本)9781424453610
A semi-globally convergent nonlinearobserver is proposed for bounded-state nonlinear systems subject to state-delay nonlinearities. The proposed design can be seen as an extension of the results given in [1]. In the present paper the observer gain is derived from a time-varying-parameter-dependent Riccati equation with arbitrary weighting matrices. Illustrative numerical example is given to demonstrate the simplicity and the efficacy of the new design.
This paper deals with simultaneous state and input-parameter estimation of a class of bounded-state nonlinear systems. By state augmentation, the unknown-input coefficient is seen as an extension of the system states ...
详细信息
ISBN:
(纸本)9781424453610
This paper deals with simultaneous state and input-parameter estimation of a class of bounded-state nonlinear systems. By state augmentation, the unknown-input coefficient is seen as an extension of the system states and consequently, an input-gain observer can be conceived to steer the observation error to the origin for some bounded and non-null control input. The proposed design remains valid for nonlinear-input systems with linear parametrization.
This paper gives an overview of a series of the authors' researches on the passivity-based visual motion observer and its applications to a variety of control and estimation problems. After providing notations and...
详细信息
The proceedings contain 227 papers. The topics discussed include: dynamical modelling of single-phase and two-phase states in thermodynamic cycles;adaptive observer for three phase source voltage under unbalanced cond...
ISBN:
(纸本)9783902661807
The proceedings contain 227 papers. The topics discussed include: dynamical modelling of single-phase and two-phase states in thermodynamic cycles;adaptive observer for three phase source voltage under unbalanced conditions;output stabilization of strongly minimum-phase systems;approximate solution method for the hamilton-jacobi equation based on stable manifold theory with applications;discontinuous feedback and nonlinear systems;3d bipedal robotic walking: models, feedback control, and open problems;consensus on nonlinear spaces;modeling and control of the interaction between flying robots and the environment;nonlinear flight control systems design for hypersonic vehicles: results and open problems;and a dynamic update law for adaptive feedforward control of nonlinear systems.
Non linear control of the squirrel induction motor propelling an Electric Vehicle (EV) is designed using sliding mode theory. The proposed scheme uses an adaptive flux and speed observer that is based on a full order ...
详细信息
This paper gives an overview of a series of the authors' researches on the passivity-based visual motion observer and its applications to a variety of control and estimation problems. After providing notations and...
详细信息
This paper gives an overview of a series of the authors' researches on the passivity-based visual motion observer and its applications to a variety of control and estimation problems. After providing notations and preliminaries, we introduce the visual motion observer which is a mechanism to estimate the target object's motion in 3D space from vision data. We next build a visual motion observer-based control system including the observer into the feedback loop and prove stability by using passivity. Then, we give three application scenarios of the observer. First scenario is dynamic control of a robot manipulator whose objective is to control a manipulator equipped with vision on its end-effector so that the camera tracks a moving target object. Second one is cooperative control where a network of rigid bodies with vision is controlled so as to achieve cooperation. Third one is cooperative estimation for visual sensor networks whose objective is to achieve tracking of estimates to a moving target and averaging them over the network simultaneously. In all of the scenarios, it is shown that the visual motion observer plays an important role in achieving the objectives.
The proceedings contain 25 papers. The special focus in this conference is on nonlinearcontrol and observerdesign: fromtheory to applications. The topics include: observers as internal models for remote tracking vi...
ISBN:
(纸本)3540279385
The proceedings contain 25 papers. The special focus in this conference is on nonlinearcontrol and observerdesign: fromtheory to applications. The topics include: observers as internal models for remote tracking via encoded information;extended luenberger observer for nonuniformly observable nonlinear systems;approximate observer error linearization by dissipativity methods;on invariant observers;remarks on moving horizon state estimation with guaranteed convergence;least squares smoothing of nonlinear systems;state estimation of a molten carbonate fuel cell by an extended kalman filter;smooth and analytic normal forms;constructive nonlinear dynamics – foundations and application to robust nonlinearcontrol;optimal control of piecewise affine systems;hierarchical hybrid control synthesis and its application to a multiproduct batch plant;closed-loop fault-tolerant control for uncertain nonlinear systems;feedforward controldesign for nonlinear systems under input constraints;system inversion and feedforward control via formal power series and summation methods;flatness-based improved relative guidance maneuvers for commercial aircraft;vehicle path-following with a GPS-aided inertial navigation system;control of switched reluctance servo-drives;controlled friction damping using optimally located structural joints;nonlinear flow control based on a low dimensional model of fluid flow and model‒based nonlinear tracking control of pressure swing adsorption plants.
This paper proposes a model-based observer, which allows for the monitoring of the partial pressures of hydrogen, oxygen assuming that the water vapor during transient fuel cell operation is known. This information ca...
详细信息
ISBN:
(纸本)9781424446018
This paper proposes a model-based observer, which allows for the monitoring of the partial pressures of hydrogen, oxygen assuming that the water vapor during transient fuel cell operation is known. This information can be used to regulate the supply of these gases to the cell whereby maintaining efficient performance. It is not practical to measure the partial pressures of each gas in the catalyst layer;however, it is possible to estimate the vapor pressure in the anode and cathode compartments from the temperature measurements. from this information, the partial pressure of the hydrogen and oxygen can be reconstructed using the fuel-cell model.
In this article, we propose a two stage controldesign scheme for simultaneous flux regulation and angular position reference trajectory tracking in induction motors. The first outer loop design stage uses a linear GP...
详细信息
ISBN:
(纸本)9781424446018
In this article, we propose a two stage controldesign scheme for simultaneous flux regulation and angular position reference trajectory tracking in induction motors. The first outer loop design stage uses a linear GPI observer based robust control, aimed at on-line load torque estimation, thus making possible its cancelation from the controller. The stator currents act as auxiliary control input variables, within a field oriented control scheme, which uses a nonlinear asymptotic flux reconstructor. The designed current signals are used then as reference trajectories for the second, inner loop, design stage, corresponding to a switched stator input voltage strategy based on an average Generalized Proportional Integral controldesign. This average design defines a discontinuous control input by means of a properly set sign function on the input tracking error. The second controller design stage, largely overcomes the effects of nonlinearities, including unknown motor parameters, present in the rotor voltages-to-rotor currents multi-variable dynamics.
暂无评论