A Codesign Approach to Real-time High Precision Control

Authors:
Y. C. Ho;K. F. Man;K. S. Tang;S. Kwong
Affiliations:
Institute for Advanced Computer Studies, Department of Computer Science, University of Maryland, College Park, MD 20742;Institute for Advanced Computer Studies, Department of Computer Science, University of Maryland, College Park, MD 20742;Institute for Advanced Computer Studies, Department of Computer Science, University of Maryland, College Park, MD 20742;City University of Hong Kong, Kowloon, Hong Kong
Venue:
Real-Time Systems
Year:
2000

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Abstract

Anew approach to design a high precisionreal-time control system for a spring forming machine is presented.This system is designed to satisfy the required high motor speedcommand signal and the product to product tolerance is limitedto 0.1%. An innovative variable pulse generation algorithmis proposed for the activation of the motor in order to meetthe stringent specifications. Because of the high speed command,software implementation of this algorithm would not be viableas this is intended to be a low cost automation system. To further enhance the system performance, an overall systemarchitecture to incorporate a hardware solution is proposed.This new architecture comprises hardware and software functionalitysuch that the codesign methodology is employed for the partitioningof the design procedures. Within this architecture, softwaredevelopment includes a user-friendly, safety and fault detectionfacility to improve the human-machine interface. This new precisioncontrol system meets the required performance specificationswith only two-pieces of 2K gates Field Programmable Gate Array(FPGA) Actel chips are required for the implementation.