期刊名称：International Journal of Soft Computing & Engineering
电子版ISSN：2231-2307
出版年度：2013
卷号：2
期号：6
页码：358-362
出版社：International Journal of Soft Computing & Engineering
摘要：The presented work envisaged to explore the possibility of developing ultra-low cost experimental setup for teaching and learning Real-Time systems. The presented work demonstrates, in steps, the development of a real-time control system with free open source code softwares. The free suite utilized and experimented within the present work composed by Linux operating system and the Real Time Application Interface (RTAI) add-on, the Scilab Computer Aided Control System Design (CACSD) software and the Control & Measurement Device Interface (COMEDI) drivers. Scilab/Scicos, a free scientific software package for numerical computations and control system simulation is used with RTAI to provide hard real-time extensions in to Linux environment. The development and deployment platform are the same and consisted of the (i) Linux, (ii) Scilab/ Scicos (iii) RTAI and (iv) COMEDI drivers running in a PC. The investment is reduced to the hardware as well as in software cost, which consists of a standard PC, dc motor and a COMEDI compatible acquisition board. The most obvious advantage of the proposed solution is that all the software or codes are free & available in the web. The whole idea is demonstrated by real time speed control of a dc motor using Pulse Width Modulation (PWM).
