The present work is oriented to offer a communicationsystem to people who undergo a severe loss of motor function as a result of various accidents and/or diseases so that they can control and interact better with the...
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ISBN:
(纸本)9781424475605
The present work is oriented to offer a communicationsystem to people who undergo a severe loss of motor function as a result of various accidents and/or diseases so that they can control and interact better with the environment, for which a brain-computer interface has been implemented through the acquisition of EEG signals by electrodes and implementation of algorithms to extract characteristics and execute a method of classification that would interpret these signals and execute corresponding actions The first objective is to design and construct a system of communication and control based on the thought, able to catch and measure EEG signals. The second objective is to implement the system of data acquisition including a digital filter in real time that allows us to eliminate the noise. The third objective is to analyze the variation of the EEG signals in front of the different tasks under study and of implementing an algorithm of extraction of characteristics. The fourth objective is to work on the basis of the characteristics of the EEG signals, to implement a classification system that can discriminate between the two tasks under study on the basis of the corresponding battles.
In this paper, the impedance perceived by an operator of a robot in multilateral controlsystem under constant communication time delay is considered. The multilateral controlsystem is one of the methods which transm...
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In this paper, the impedance perceived by an operator of a robot in multilateral controlsystem under constant communication time delay is considered. The multilateral controlsystem is one of the methods which transmit tactile sense to many remote places. Time delay possibly makes the performance of the multilateral controlsystem worse. For example, time delay makes an operator feels large operational force. The operational force means that the operator feels the force except the reaction force from the environment. Moreover, time delay makes the operator feels that the environment is softer than the real stiffness. In this paper, the multilateral controlsystem with three robots is considered. By frequency characteristics of the impedance perceived by the operator, the effect of time delay on the impedance perceived by the operator is verified. The results obtained in the analysis are verified by experimental results.
controller area network (CAN) is one of the popular networks with the international standard, and adopted mostly on the vehicle. The application of CAN communication in more and more vehicles had led to requirements t...
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ISBN:
(纸本)9781424418480
controller area network (CAN) is one of the popular networks with the international standard, and adopted mostly on the vehicle. The application of CAN communication in more and more vehicles had led to requirements that the assignment of message identifiers to communication be standardized for certain application. SAE J1939 was designed to allow electronic devices from different vendors to communicate with each other through a standard architecture. The SAE J1939 communication protocol had been implementation in electric city bus used microchip V85070F3239 embedded CAN controller. The CAN network protocol used on electric city bus was established and an implementation method was put forward. The identification bit of data for the vehicle controller was presented in accordance with J1939 protocol. The communication process for them was also given based on CANoe platform. The CAN protocol and controller have been used on a pure electric city bus and work well.
An H alpha approach to robust control of bilateral teleoperation systems under communication time-delay is considered and applied on an experimental setup. Using a small gain approach an H alpha controller is first ...
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An H alpha approach to robust control of bilateral teleoperation systems under communication time-delay is considered and applied on an experimental setup. Using a small gain approach an H alpha controller is first designed in the nominal case and a robust design is then proposed for any communication delay in the case of environment uncertainties. When delay independent stability cannot be achieved, a way to determine the maximal allowed time-delay is provided. Simulation and experimental results are provided.
The i-mode service has gained rapidly in popularity and it saw the number of users exceed 34 million in July 2002. In addition, the number of packets that the PDC-P (Personal Digital Cellular-mobile Packet data commun...
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The i-mode service has gained rapidly in popularity and it saw the number of users exceed 34 million in July 2002. In addition, the number of packets that the PDC-P (Personal Digital Cellular-mobile Packet data communicationsystem) processes for the i-mode service has increased. It has therefore become important to design the system so that it can cope with the increasing volume of packet data. This paper analyzes the characteristics of i-mode traffic, and discusses an appropriate congestion control mechanism, which has been adopted in the PDC-P system.
We consider distributed discrete-event systems where agents (or local sites) are required to communicate in order to perform some specified monitoring and control tasks. A strategy to minimize communication between si...
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We consider distributed discrete-event systems where agents (or local sites) are required to communicate in order to perform some specified monitoring and control tasks. A strategy to minimize communication between sites is developed.
In this work different communication alternatives for a supervision and controlsystem based on communications services provided over public networks are evaluated in order to determine which offers the best services ...
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In this work different communication alternatives for a supervision and controlsystem based on communications services provided over public networks are evaluated in order to determine which offers the best services and costs. Three communication alternatives for the interconnection of the remote station and the central station are analysed, all of which are situated in the metropolitan area of a large city: point-to-point connections over ISDN (integrated services digital network), (virtual private networks) VPN's/IP over ISDN, and VPN over ADSL (asymmetric digital subscriber line). For the communication between the central station and the mobile remote clients, the connection via GPRS (general packet radio service) is evaluated. For the measurements and posterior analysis control information and images have been transmitted. The viability of these types of solutions in the proposed scenarios is shown and the costs involved in each solution are analysed.
Technological advances have enabled distributed controlsystems to be implemented via networks. This allows feedback control loops to be closed over a communication channel. This paper develops a controlsystem with h...
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Technological advances have enabled distributed controlsystems to be implemented via networks. This allows feedback control loops to be closed over a communication channel. This paper develops a controlsystem with high speed and real time communication links. The two-degree-of-freedom control is utilized in this servo controlsystem and delta-sigma modulation is employed to compress data and transmit the signal over the transmission channels between the controller and the servomotor. Simulations and experimental results show that it is possible to compensate the noise in signal transmission channels. In addition, FPGA is used in the controlsystem and the communicationsystem to realize high-speed controlsystem with 0.6 mus sampling period and latency. The data is also compressed and transmitted with FPGA in the experiments
A highly advanced and diversified society has been making a significant impact on the increase in the demand for mobile communications. This paper proposes a new concept of a mobile communicationsystem based on the d...
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A highly advanced and diversified society has been making a significant impact on the increase in the demand for mobile communications. This paper proposes a new concept of a mobile communicationsystem based on the deployment of decentralized autonomous radio link control with decentralized base stations (DCM system: Decentralized control architecture Mobile communicationsystem). After presenting the service conditions and the system objectives, it gives a description of a basic DCM system, which includes the system configuration, radio system, and control architecture. The concept of autonomous radio link control that embodies the system is then discussed. One specific manifestation called ESCORT, that realizes autonomous radio link control, is then described. The concluding section will show the prospects for future development of this system and discuss additional technical problems that still must be overcome.
Increased availability of electronics at much lower costs have helped to create a new breed of controlsystem components; so called "smart" components, which can perform control responsibilities in the actua...
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Increased availability of electronics at much lower costs have helped to create a new breed of controlsystem components; so called "smart" components, which can perform control responsibilities in the actuator and sensor components as well as in the controller. "Smart" components can communicate bi-directionally in networked controlsystems. Our results show that an "ideal" system with bidirectional communications is equivalent to a single loop controlsystem in terms of performance. However, performance improvements are possible in "non-ideal" cases. Using bi-directional communications can also improve the controlsystem design process since it facilitates the configuration and re-configuration. Building cost effective modular controlsystems using bi-directional controls appears increasingly attractive.
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