Showing papers by "Sungkyunkwan University published in 1988"
11 Apr 1988
TL;DR: In this article, a time-optimal position control scheme based on Pontryagins's minimum principle is proposed for the current-source-inverter (CSI)-fed induction motor system.
Abstract: A time-optimal position control scheme based on Pontryagins's minimum principle is proposed for the current-source-inverter (CSI)-fed induction motor system. An induction motor with field-oriented control is modeled by a fast time-optimal position control system of second order that has two modes of operation: a bang-bang mode that operates until the position is close to target, followed by a DC breaking mode that provides asymptotic stability. This is achieved by substituting the time-optimal controller for the speed controller in the conventional field-oriented control loop of the motor. The validity of the time-optimal approach has been verified by an experimental test carried out with a prototype MC68000-based microcomputer system and a 5 HP induction motor. Experimental and simulation results are in close agreement. >
44 citations
TL;DR: In this paper, the authors used magnetite microspheres collected from the lungs and liver of male mice to measure the size and shape of the interior cavities of the liver and lungs.
12 citations