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Details of the Real Time Linux Foundation Working Group Project

OSADL Project: Real Time Linux Workshops

Real Time Linux Foundation Workshops since 1999

Real Time Linux Workshops

1999 - 2000 - 2001 - 2002 - 2003 - 2004 - 2005 - 2006 - 2007 - 2008 - 2009 - 2010

Ninth Real-Time Linux Workshop on November 2 to 4, 2007, in Linz, Austria

Simulink Target for Real Time Linux Extension: Hardware Control using a Wrapper for Comedi

Klaus Oppermann, Daniel Schleicher and Bernhard G. Zagar

A commonly used hardware in-the-loop environment is the dSPACE system, whose strength is aimed at high fexibility and processing speed, but involves rather costly hardware and software licence fees. In our proposed paper we elaborate a scaleable hardware platform running a low-cost RTLinux open source system of comparable processing speed. There is a great variety of applications that need such rapid prototyping systems. Especially developers of electromechanical plants are using rapid prototyping systems to tune less known system parameters and controller settings. These needs are well covered by the software environment MATLAB/Simulink and the _Simulink Target for Real-Time Linux_ (STRTL toolbox). STRTL was developed within the Ph.D. thesis of R. M. Garcia on which our system is based upon. Unfortunately STRTL is no longer actively supported and provides only certain drivers for a limited set of hardware in its initial design. In our work we extended the driver concept of STRTL to the well known driver interface standard comedi. This enables the STRTL to use all the hardware supported by comedi. In this proposed paper we show the applicability of our package to control an electric drive used in a student lab course aimed at familiarising the students with controller systems. The paper is organised as follows: First the requirement for this rapid prototyping system are detailed. Secondly the comedi-STRTL driver is discussed in detail. Finally we demonstrate the successful application of this extension by means of an electric drive controller. We conclude our paper with some remarks and the reference to our website where this extension can be downloaded freely.


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