The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The problems of stochastic stability and sliding mode Hinfin control for a class of nonlinear matched and mismatched uncertain systems with stochastic jumps are considered in this paper. The uncertain system under consideration may have mismatched norm bounded uncertainties in the state matrix. The transition of the jumping parameters in the systems is governed by a finite-state Markov process. A...
In this paper, a new kind of networked control system with asynchronous sampled period is modeled, and the integrity design of the networked control system with sensors failures and actuators failures is analyzed based on fault-tolerant control theory. Sufficient condition that the stability of networked control systems in sensors failures and actuators failures is given.
This paper presents the H2 model reduction problem for discrete-time switched systems using average dwell-time approach. First, by constructing multiple Lyapunov functions, the exponential stability criterion of switched systems under average dwell-time taualpha is established. Then, a reduced-order model for the underlying system is constructed, which guarantees these two models are close in H2 norm...
In this paper, robust stabilization problems for Networked Control System (NCS) with data loss are investigated. We treat the data dropouts caused by network transmission data rate limit as a switch and obtain the discrete-time linear stochastic switch model for NCS. The stability analysis of closed-loop NCS with data dropout is studied, and a robust Hinfin state feedback controller is designed to...
Piecewise systems arise in many kinds of practical control systems due to the existence of certain effects, such as dead-zone, saturation, relays and hysteresis. This paper deals with the problem of exponential stabilization for a class of piecewise continuous-time switched control systems with nonlinear uncertainties, which are equivalent to the general form of piecewise switched affine nonlinear...
An automatic control reconfiguration scheme is developed based on multiple model approach for plants with unknown actuator faults. Under the designed adaptive controllers, the plant output tracks a given reference output asymptotically, despite the uncertainties in actuator failures. The stability of overall systems is proved, and numerical simulations are performed using an aircraft model to demonstrate...
Based on convex combination technique and LMI (linear matrix inequality) method, the problem of state observers design for a class of switched interconnected large-scale nonlinear systems is studied. Interconnected terms are composed of linear part and nonlinear part. By using single Lyapunov function technique, a sufficient condition of stabilization for error systems is obtained and expressed as...
The problem of feedback stabilization for a class of switched nonlinear systems is considered using polynomial Lyapunov function, and two methods are presented based on sum of square decomposition. The first is direct method and feedback controllers can be obtained by solving feasibility problem of sum of square program. The second method is iterative method and feedback controllers can be obtained...
Slide mode variable structure control method is used for designing a digital controller of BLDC electric actuator in this paper. Firstly, the mathematic model of electric actuator is built according to the selected BLDC motor. Secondly, two slide mode algorithms, proportion switching algorithm and velocity trending law algorithm, are designed for the electric actuation system. Thirdly, we design a...
In this paper, a new variable structure control method involving fuzzy adaptive regulation of reaching law is presented for seismically-excited building structures. The undue chattering effect, the major disadvantage of conventional variable structure controllers, has been avoided by introducing this new method without losing the robustness against parametric uncertainties and modelling inaccuracies...
A control method of electromagnetic energy release and storage in a power inductor is introduced. The control techniques and the practical circuit made can control the inductor energy exchanges so that the release of inductor energy can be manageable. The practical circuit operation of this control technology and the circuit power loss effect are discussed and analyzed. Since the power loss by the...
As sliding mode (SMC) control has just a unitary switching face, the system converges slowly at the origin. An improvement was made to the linear switching surface of SMC for autonomous underwater vehicles (AUVs) in this paper. A polyline switching surface was proposed, velocity control and velocity control at appointed positions were realized. The improved switching surface was made up of the lines...
A new kind of intelligent control is discussed, namely, human simulated intelligent control (HSIC), which hierarchically include three levels: centrum chief level (CC), organizing and coordinating level (OC), and unit control level (UC). Then the control problem of arbitrary switch control of circular-rail double pendulum (CRDP) is studied. Finally, the control system for this control problem is designed...
A PID neural-network-based space-vector pulse width modulation (SVPWM) for a three-level inverter is proposed in this paper. A three-level inverter has lots of switching states about the vectors, and the implementation of modulation algorithm is considerably complex. In the proposed design, fast implementation of SVPWM algorithm is realized based on PID neural network instead of conventional neural...
With the development of wireless communication and microelectronic technology, wireless sensor network (WSN) have shown big potential in environmental monitoring and industrial applications. Failures of nodes or links are inevitable in sensor networks due to the inhospitable environment and unattended deployment. To improve the reliability of wireless sensor networks, a cluster-based routing method...
In order to enhance the stability of networked control systems(NCS) constructed by switched Ethernet, proposed a new kind of flow control approach based on PAUSE operation defined in 802.3x. During the implementation of flow control, the switch monitors its input and output buffers to prevent buffer overflow. Based on the analysis of structure of PAUSE frame, a general method was provided to design...
A fuzzy sliding mode controller for permanent magnet synchronous motor (PMSM) is designed to solve the chatting problem in this paper. The sliding mode controller based the assumption of known uncertainty bounds often cause the chattering phenomena in the control system. So a simple fuzzy controller with sliding mode technique is used to evaluate the uncertainty bounds of PMSM which are caused by...
Aiming at the practical plants with strong nonlinear characteristics, a new multi-model internal model control (MIMC) strategy based on Gaussian potential function networks (GPFN) is proposed in this paper. The internal model is represented by GPFN and the corresponding controller can be got directly, which simplifies the control law design and analyses greatly. Meanwhile, the way of model switch...
A new method based on virtual spring-damper model is proposed for collision-free trajectory planning of planar underactuated robots. The generalized forces of nonholonomic constraints equations are modified by the virtual spring-damper model when there are obstacles in workspace. The partly stable controllers are adopted and the energy based fitness function is built, then the best switching sequence...
Q-Learning can successfully solve the congestion problem of isolated intersection. But it is not available to realize the coordination between two intersections. A switching-model of two intersections is introduced in this paper. The concept of combinative phase is put forward in order to divert two intersections into a single one. In this way, we can apply Q-Learning on two adjacent intersections...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.