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Internet random time delay constitutes a major challenge for Internet-based teleoperation systems. Since the uncertain time delay may degrade the system performance, and even lead to instability. Although large-scale research works have been conducted on the understanding, testing, and analysis of Internet round trip time delay (RTT), it is not appropriate to use RTT in control methods design. It...
Time delay degrades the performances of Internet-based control systems or teleoperation system, and even causes instability of closed-loop systems. If the Round Trip Time-delay (RTT) is acquired exactly previously, it is helpful to improve the performance of Internet-based control systems. Therefore, analysis or prediction for Internet time delay has become a hot research problem. This paper proposes...
A novel control strategy based on motion description language (MDL) is proposed in this paper, to distribute computational and communication resources in a particular tele-robotic system. On one hand, limited bandwidth, random time delay and other transmission problems of Internet make it necessary to reduce data transferred between master and slave site. On the other hand, remote robotic system has...
Robotic teleoperation constitutes a key technique for networked manufacturing system. Since Internet is noisy and performance of telerobotic systems strongly depends on communication conditions, control strategies which could be used to distribute computation and communication resource properly and require less data transmission are required. Motion description language (MDL) is an appropriate solution...
A MDL-based control method for tele-robotic systems over internet is presented in this paper. Internet-based tele-robotic systems are characterized by the fact that the operator and the remote robotic system are connected by Internet. Since limited bandwidth, random time delay and other transmission problems deteriorate performance of tele-robotic systems severely, control strategies which can be...
In the study of Internet-based telerobot system, the aim is at human-machine integration and a BMI-based telerobot system over Internet is proposed using a new method of direct human-machine integration interface: brain-machine interface (BMI). The difference between this system and the traditional Internet-based telerobot system lies in that operators can directly control remote robots just by their...
This paper is concerned with characteristics of human behaviors in Internet-based teleoperation system under communication delay. Especially frequency character and velocity character of human behaviors affected with random delay of the Internet are analyzed. We are researching in human adaptive network mechatronics which can not only evaluate operational behaviors of human, but also help the operator's...
For Internet based real-time teleoperation systems, unknown and variable time delay can cause instability in the closed loop control system and hence hinder task accomplishment. According to requirement of Internet-based teleoperation, exact prediction of RTT can improve greatly performance of the teleoperation system. In this paper, statistical properties of the Round Trip Timedelay (RTT) are investigated...
The variable time delay and the packet loss degrade the performance of Internet based teleoperation system severely, even make the system unstable. Most of the previous work on Internet-based teleoperations rest on many assumptions, for example, time delay is constant or has upper bound, control is not in real-time. This paper presents a new predictive control strategy for the Internet based teleoperation...
The variable time delay and the packet loss degrade the performance of Internet based teleoperation system seriously, even make the system unstable. To overcome the trouble, an idea that using CARIMA model of the linearized slave robot to design a controller based on the Generalized Predictive Control (GPC) method is proposed in this paper. We place the GPC controller at the remote site. First of...
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