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Stability guaranteed control: time domain passivity approach

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3 Author(s)
Jee-Hwan Ryu ; Dept. of Electr. Eng. & Comput. Sci., Korea Adv. Inst. of Sci. & Technol., Taejeon, South Korea ; Dong-Soo Kwon ; B. Hannaford

A general framework for expanding the time-domain passivity control approach, to large classes of control systems is proposed. We show that large classes of control systems can be described from a network point of view. Based on the network presentation, the large classes of control systems are analyzed in a unified framework. In this unified network model, we define "virtual input energy", which is a virtual source of energy for control, and "real output energy" that is physically transferred to a plant to allow the concept of passivity to be used to study the stability of large classes of control systems. For guaranteeing the stability condition, the time-domain passivity controller for two-port is applied. Design procedure is demonstrated for a motion control system. The developed method is tested with numerical simulation in the regulation of a single link flexible manipulator. Totally stable control is achieved under wide variety of operating condition and uncertainties without any model information.

Published in:

IEEE Transactions on Control Systems Technology  (Volume:12 ,  Issue: 6 )