The Experts below are selected from a list of 117216 Experts worldwide ranked by ideXlab platform
H. Ishigaki - One of the best experts on this subject based on the ideXlab platform.
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A master-slave manipulation system with a force-Feedback Function for endoscopic surgery
2001 Conference Proceedings of the 23rd Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 1Co-Authors: Takayuki Hoshino, H. Ishigaki, Y. Konishi, K. Kondo, T. Suzuki, T. Saito, Naoto Kakuta, Akira Wagatsuma, Kunihiko MabuchiAbstract:A master-slave manipulation system with a force-Feedback Function was developed for endoscopic surgery. The slave manipulation system, which is located at the head of a robot arm system, uses a forceps system which is capable of being opened and closed by a DC motor-driven arrangement. The master manipulator involves a mechanical link system which has the same structure and scale as the slave robot-arm system. The value of this system was verified experimentally using a bench-test system with one degree of freedom which has the same force-Feedback mechanism as the master-slave manipulation system. Although the system became oscillatory and unstable when the master manipulator was operated using a force Feedback system (simple force reflection servo controller), it was possible to make the system stable improving the force Feedback system by adding impedance term (improved force reflection servo controller).
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Development of a remotely-operated master-slave manipulation system with a force-Feedback Function for use in endoscopic surgery
Proceedings of the 22nd Annual International Conference of the IEEE Engineering in Medicine and Biology Society (Cat. No.00CH37143), 1Co-Authors: A. Matsui, T. Suzuki, Kunihiko Mabuchi, Akio Namiki, Masatoshi Ishikawa, H. Fujioka, H. IshigakiAbstract:This study has attempted to develop a prototype of a master-slave manipulation system with a force-Feedback Function for use in remote endoscopic surgery. The slave manipulation system uses a forceps system which is capable of being opened and closed by a motor-and-wire-driven arrangement, and which is located at the head of a robot arm system. The master manipulator involves a mechanical link system which has the same structure and scale as the slave robot-arm system. The forceps system is the same as the one that is used in the slave manipulator; likewise, it is also located on the head of the link system (the reaction force Is generated by the same motor-and-wire-driven system). A trocar system which can generate a reaction force against the movement of the master forceps was also designed and developed. In this system, force Feedback was conducted by a "force reflection method". The position of the slave forceps was controlled in such a way as to mimic the movement of the master. The force which is generated when the slave manipulator touches or grips some object is detected by an increase in the electric current of the motors which drive the slave forceps; this current value is then used as a Feedback factor in order to generate the reaction force against the movement of the master manipulator. The slave manipulator was found to accurately and quickly mimic the movement of the master manipulator, with the reaction force generated at the master manipulator also reproducing well the force that was actually applied to the slave manipulator.
L.-k. Chen - One of the best experts on this subject based on the ideXlab platform.
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Stability of discrete bilinear systems with time-delayed Feedback Functions
IEEE Transactions on Automatic Control, 1993Co-Authors: X. Yang, L.-k. ChenAbstract:The stability of discrete time-varying bilinear systems is studied. The control u(t) in the bilinear systems is considered as output Feedback Functions with time delay, i.e. u(t)=f(y(t), y(t-1),. . .,y(t-r+1)), which is an important case and is absent in the literature. Also, the authors assumed that the Feedback Function f is of larger classes than the classes given by current literature. The sufficient conditions derived in theorems in the paper depend only on the coefficient matrices of the bilinear systems, so that these results are convenient to check and to apply in engineering problems. >
Peter J. Ramadge - One of the best experts on this subject based on the ideXlab platform.
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On the periodicity of symbolic observations of piecewise smooth discrete-time systems
Proceedings of the 28th IEEE Conference on Decision and Control, 1Co-Authors: Peter J. RamadgeAbstract:The behavior of discrete-time systems composed of a set of smooth transition maps coupled by a 'quantized' Feedback Function is studied. The Feedback Function partitions the state space into disjoint regions, and assigns a smooth transition Function to reach region. The main result is that under a constraint on the norm of the derivative of the transition maps, and an assumption on the limit points of the state trajectory, every bounded state trajectory leads to a region index sequence that is eventually periodic. >
A. Matsui - One of the best experts on this subject based on the ideXlab platform.
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Development of a remotely-operated master-slave manipulation system with a force-Feedback Function for use in endoscopic surgery
Proceedings of the 22nd Annual International Conference of the IEEE Engineering in Medicine and Biology Society (Cat. No.00CH37143), 1Co-Authors: A. Matsui, T. Suzuki, Kunihiko Mabuchi, Akio Namiki, Masatoshi Ishikawa, H. Fujioka, H. IshigakiAbstract:This study has attempted to develop a prototype of a master-slave manipulation system with a force-Feedback Function for use in remote endoscopic surgery. The slave manipulation system uses a forceps system which is capable of being opened and closed by a motor-and-wire-driven arrangement, and which is located at the head of a robot arm system. The master manipulator involves a mechanical link system which has the same structure and scale as the slave robot-arm system. The forceps system is the same as the one that is used in the slave manipulator; likewise, it is also located on the head of the link system (the reaction force Is generated by the same motor-and-wire-driven system). A trocar system which can generate a reaction force against the movement of the master forceps was also designed and developed. In this system, force Feedback was conducted by a "force reflection method". The position of the slave forceps was controlled in such a way as to mimic the movement of the master. The force which is generated when the slave manipulator touches or grips some object is detected by an increase in the electric current of the motors which drive the slave forceps; this current value is then used as a Feedback factor in order to generate the reaction force against the movement of the master manipulator. The slave manipulator was found to accurately and quickly mimic the movement of the master manipulator, with the reaction force generated at the master manipulator also reproducing well the force that was actually applied to the slave manipulator.
Klaus Thurau - One of the best experts on this subject based on the ideXlab platform.
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tubuloglomerular Feedback control of renal vascular resistance
Comprehensive Physiology, 2011Co-Authors: Jurgen Schnermann, Dieter A Haberle, J M Davis, Klaus ThurauAbstract:The sections in this article are: 1 Historical Background 2 TGF Response Characteristics 2.1 Open-Loop Studies 2.2 Closed-Loop Studies 3 Mechanisms of the TGF Reaction 3.1 Anatomical Pathway 3.2 Luminal Signal 3.3 Stimulus–Response Coupling Mechanisms 3.4 The Vascular Reaction 4 Integrative Feedback Function 4.1 Mechanisms of TGF Resetting 4.2 Phenomenology of TGF Responsiveness
