this paper presents a comparison of two control strategies applied to a Single-Phase Back to Back converter. Both techniques use two loops: one inner current loop and an outer voltage loop. the first control strategy ...
详细信息
ISBN:
(纸本)9781424446889
this paper presents a comparison of two control strategies applied to a Single-Phase Back to Back converter. Both techniques use two loops: one inner current loop and an outer voltage loop. the first control strategy is based on a classical PI control. the second one uses a control scheme to decouple the active and reactive component of the input current, obtaining a better steady state and dynamic response of the system. the performance is verified with simulation and experimental results.
In this paper, we consider the synchronization problem via nonlinear observer design. A new asymptotic polynomial observer for a class of nonlinear oscillators is proposed, which is robust against output noises. A suf...
详细信息
ISBN:
(纸本)9781424446889
In this paper, we consider the synchronization problem via nonlinear observer design. A new asymptotic polynomial observer for a class of nonlinear oscillators is proposed, which is robust against output noises. A sufficient condition for synchronization is derived analytically withthe help of Lyapunov stability theory. the proposed technique has been applied to synchronize chaotic systems (Lorenz and Rossler systems) by numerical simulation.
In this paper we introduce an adaptive structure that dynamically calculates the gains of a PI controller, in presence of parametric disturbances in the controlled process approach, withthe purpose of maintaining a d...
详细信息
ISBN:
(纸本)9781424446889
In this paper we introduce an adaptive structure that dynamically calculates the gains of a PI controller, in presence of parametric disturbances in the controlled process approach, withthe purpose of maintaining a desired pole assignment in closed loop, besides fulfilling a specified time closed loop performance. the designing procedure presented in this work is useful when the process to be controlled can be satisfactorily accomplished with a first or second order transfer function.
the street network of a city is a dynamic entity in continuous change. Sometimes change can be seen as 'permanent', sometimes as 'temporary.' New streets or changes to existing streets can be seen as p...
详细信息
ISBN:
(纸本)9781424446889
the street network of a city is a dynamic entity in continuous change. Sometimes change can be seen as 'permanent', sometimes as 'temporary.' New streets or changes to existing streets can be seen as permanent. Signal malfunctions, potholes, accidents change the capacity of the network can be seen as a temporary change. the dynamic nature of the network requires a tool to model and analyse it;while allowing constants updates. this work proposes a Petri net tool that allows the user to flexibly model, modify and analyze in a progressive fashion a street network. An example of its use is included. the work is restricted to the definition of the network.
In this paper, we propose a bounded error observer of reduced order for a class of chaotic systems. the state variables are estimated by means of output system, which is supposed to be exactly known. the estimation me...
详细信息
ISBN:
(纸本)9781424446889
In this paper, we propose a bounded error observer of reduced order for a class of chaotic systems. the state variables are estimated by means of output system, which is supposed to be exactly known. the estimation methodology is based on a suitable change of variable which allows generating artificial variables to infer the remaining states constructing a differential-algebraic structure. the proposed methodology is applied to a class of Lipschitz nonlinear systems with success. Some remarks about the convergence characteristics of the proposed estimator are given and numerical simulations illustrate the effectiveness of the suggested approach.
this paper is devoted to the problem of robust design for a class of continuous-time control systems with bounded uncertainties. We study a family of nonlinearly affine dynamical system and apply a modified invariant ...
详细信息
ISBN:
(纸本)9781424446889
this paper is devoted to the problem of robust design for a class of continuous-time control systems with bounded uncertainties. We study a family of nonlinearly affine dynamical system and apply a modified invariant ellipsoid technique. this makes it possible to obtain practically stable closed-loop controllable models. the design of the stabilizing feedback control strategy is based on the conventional Lyapunov-like approach to invariant sets of dynamical systems. We propose a computational scheme for a constructive treatment a feedback control law such that the region of the practical stability of the resulting system is minimized. the corresponding solution procedure contains an auxiliary LMI-constrained optimization problem. the effectiveness of the elaborated invariant ellipsoid based method is illustrated by a numerical example.
In this paper we investigate a priori error estimates of quadratic convex optimal control problem governed by nonlinear parabolic equations using mixed finite element methods. the state and co-state are approximated b...
详细信息
ISBN:
(纸本)9781424446889
In this paper we investigate a priori error estimates of quadratic convex optimal control problem governed by nonlinear parabolic equations using mixed finite element methods. the state and co-state are approximated by the lowest order Raviart-thomas mixed finite element spaces and the control is approximated by piecewise constant functions. By applying some error estimates results of mixed finite element methods for parabolic equations, we derive a priori error estimates of optimal order both for the coupled state and the control approximation of the optimal control problem
this paper deals with an optimal design of linear networked control systems. We study a class of delayed dynamical systems in the continuous time-domain and propose an optimization approach based on the newly elaborat...
详细信息
ISBN:
(纸本)9781424446889
this paper deals with an optimal design of linear networked control systems. We study a class of delayed dynamical systems in the continuous time-domain and propose an optimization approach based on the newly elaborated hybrid LQ-type techniques. Moreover, we develop an explicit connection between the given networked control processes and auxiliary hybrid models. the optimal feedback control strategy for the networked systems is obtained as a consequence of the Riccati-formalism for the associated hybrid LQ problems. We also consider some alternative optimization techniques and discuss stability properties of the optimal trajectories.
this paper describes the problem of design of an experimental setup for rotordynamic analysis and unbalance control. the rotor system has two disks in an asymmetrical configuration along a steel shaft which is connect...
详细信息
ISBN:
(纸本)9781424446889
this paper describes the problem of design of an experimental setup for rotordynamic analysis and unbalance control. the rotor system has two disks in an asymmetrical configuration along a steel shaft which is connected to a three phase AC motor by a flexible coupling. A suspension with two linear electromechanical actuators is used to control actively the vibrations caused by unbalance in disks. A LQR scheme with estimated state feedback is developed based on a reduced order finite element model of rotor system. the controller is applied taking into account the actuators dynamics. Some advances in the construction of the prototype and open loop experimental results are presented. the dynamic behavior of the closed loop system are shown by numerical simulations.
In this paper the vibration attenuation problem in automotive suspension systems is presented. A robust active vibration control strategy based on sliding mode and differential flatness control techniques is proposed ...
详细信息
ISBN:
(纸本)9781424446889
In this paper the vibration attenuation problem in automotive suspension systems is presented. A robust active vibration control strategy based on sliding mode and differential flatness control techniques is proposed as a solution alternative of this problem. this active vibration control scheme only requires position measurements of the wheel and car body. State algebraic on-line estimation is used to avoid the use of sensors of acceleration and velocity. Simulation results are included to show the dynamic performance and robustness of the proposed active suspension system.
暂无评论