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Internet-based teleoperation is becoming an important research field in robotics. Most of existing works employed the wired Internet or wireless local area network to transmit signals, which largely limited the movement of the robots. This paper presented a teleoperation project based upon mobile communication networks. Using mobile networks as the wireless transmission media free robots from space...
This paper described an integrated system with an atomic force microscope designed for nanomanipulation. Simulation of the nanomanipulation process was accomplished by estimating the interactive forces between molecules of the AFM tip and the sample based on the principle of contact mechanics. The intermolecular force and interactive force between the tip and sample are modeled by the Lennard-Jones...
Mobile ad-hoc networks are characterized by self-organization, rapid deployment and fault tolerance, however of limited communication range and frequent topology change. For a multi-robot formation supported by mobile ad-hoc networks, when the robots change their formation to avoid obstacles or for other purposes, a robot may easily lose its wireless connection with the network if it goes beyond the...
Based on the core theorem of the frequency domain coherence in signal processing, called as double spectral theorem, we presented the two types of new magnitude-squared coherence function (MSCFs) in order to extract the coherence between two signals and gave the conditions that they are equal to 1 or 0. Here, we further studied their properties sensitive to initial phases of two signals and phase...
A DC-ripple reinjection concept, described in the literature with reference to the line-commutated current source converter, is applied in this paper to the self-commutated current source converter. This is achieved by means of a reinjection converter fed, via a single-phase transformer, from the triple frequency ripple signal. It is shown that the three-phase bridge can be made to operate effectively...
Studying frequency domain representation for the coherence between two signals is an important basic theoretical problem in the fundamental theories of signal processing. However, the old magnitude-squared coherence function (OMSCF) has been proved identical to 1, so that to cannot be used to extract any coherence information. Here, we will prove a core theorem in frequency domain coherence theories...
This paper describes a virtual reality and haptic interface between human and the atomic force microscope (AFM), which allows the operator to sense and touch the surface and nanoparticles during the manipulation with an AFM tip. The tip-sample interaction forces and intermolecular forces between the tip and surface are modeled based on Lennard-Jones potential and JKR theory, respectively. Our objective...
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