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OTA-based Floating Inductance Simulator
Chitpol Koomgaew,Wandee Petchmaneelumka,Vanchai Riewruja 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
A simple circuit technique to realise a floating inductance simulator for system response compensation is presented in this paper. The circuit implementation is based on the use of the operational transconductance amplifiers (OTAs) as active elements. The proposed circuit converts a grounded capacitance into a floating inductance with electronically variable properties. The proposed inductor is attractive in terms of simple configuration and low cost. Experimental results verifying the performances of the proposed circuit are also included.
High Efficiency Postprocessor for Generic NC Machine
Thepjit Cheypoca,Chanon Lekthamrong,Chitpol Koomgaew,Virot wuti,Vanchai Riewruja 제어로봇시스템학회 2010 제어로봇시스템학회 국제학술대회 논문집 Vol.2010 No.10
Postprocessor for generic numerical control (NC) machines is introduced in this article. The proposed postprocessor can convert the cutter location data from general CAD/CAM system or the path data from halftone bitmap picture to NC machine control command in the form of standard G-code. The purpose of this work is proposed a high efficiency postprocessor that can be generated linear and helical interpolation in G-code machine command without requiring CAD/CAM system facility. The input data of the postprocessor can also be directly acquired from x-y coordinates of workpiece. The proposed postprocessor is developed using visual C# programming language under window XP environment. G-code generated from the proposed postprocessor using the cutter location data of sample bitmap picture is used for experimental demonstration with generic NC machine. As the result, the proposed postprocessor exhibits a benefit for simple NC machine tool.