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 reliability of computer network is related not only with the topology of the network and the reliabilities of the components, but also with the configurations of the nodes and the traffic flowing into the network. Nodes consist of two failure modes: congestive failure and failure related with inactivation of the software and hardware. The node's reliability related with the failure of hardware...
This paper deals with the control of heat and mass transfer processes. The mathematical model of these processes is presented by a distributed parameter system with a so called distributed control and described by an inhomogeneous parabolic partial differential equation in one space dimension. The actuators in these processes are located above the channel, through that the medium to be heated flows...
The computed feedback linearization is proposed to control a nonlinear mechanical system. This technique numerically determines the feedback signal, as a function of state, such that the resulting feedback system is linear and stable. The aim is to design a universal controller for nonlinear system based on feedback linearization. Once the feedback system is linear, the superposition holds, and thus...
Aiming at the uncertain NCS with bounded long time delay, the time-varying network-delay is translated into constant loop-delay by setting the proper network interface, and the augmented plant model implicating delay information is established. Then for the uncertain part of system, a disturbance estimator is designed. On the basis of the above mentioned studies, a class of disturbance-estimated sliding...
Aiming at the NCS with stochastic less delay, a discrete sliding mode control strategy based on delay estimation online is presented. The delay iterative measuring and pretest parameters-based estimating methods are adopted, and a sliding mode controller with loop-delay estimation online is designed to overcome the adverse influence caused by time-varying delay. Simulation study indicates that the...
The paper presents an output tracking technique for a balanced rod inverted pendulum based on computed feedback linearization. For any given trajectory of pendulum, which is the output, the trajectory of rod position, which is the internal state, is determined such that the system is input state linearizable without state transformation. Both output and state are used to stabilize and also linearize...
In this paper we propose a new control algorithm for trajectory tracking of a robotic manipulator. Our controller is designed by combining a fixed controller and an adaptive fuzzy controller for tracking a desired trajectory in the vicinity of uncertain environment and change in manipulator dynamics. The controlled system is characterized by feedforward and feedback components which can be computed...
The design strategy of adaptive controller for anti-slip system of EV (electric vehicle) is proposed. The proposed system is constructed by preparing both systems of disturbance observer and parameter estimation. The load variation of the tire slip is observed as the equivalent disturbance of motor system by employing the adaptive disturbance observer, and the vehicle speed is estimated. The tire...
This paper studies the kinematics optimization of redundant manipulators. Based on the relationship between self-motion variable and Jacobian null-space vector, a new method for choosing self-motion variable of redundant manipulators is proposed; Using linearization, a unified formulation of kinematics performance criterion is introduced and its analytical form in terms of self-motion variable is...
Camera-based systems are frequently used to track moving objects which are in the field of their view. This paper describes design and development of a camera-based tracking robot that can constantly track moving object without necessity of calibrating camera in real world units then control the two-wheeled moving platform to follow the object. The camera serves as a feedback sensor to guide robot...
A double-stage feedback control structure for a double-stage mechanical system, with a single optical metrology is developed to reach nanometer accuracy at high bandwidth over large displacements. A piezoelectric stack actuator is used for fine positioning, while a permanent magnet (PM) stepper motor handles the coarse positioning. Two different control approaches are compared for driving the PM stepper...
The paper develops a new measurement system based on computer visual feedback and adopts the nonlinear control method for measuring and controlling the synchronization error of dual-cylinder-group electro-hydraulic system in the pushing railway bridge machinery. According to theory of computer visual feedback, a new kind of model of measurement system and the algorithm of transformation of coordinates...
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.