Abstract

With the recent development of kernel patches for implementing kernel preemptability and high-resolution timers (and the acceptance of the first patch in the 2.5 development kernels), supporting real-time applications in Linux user-space is no more a dream. However, real-time applications must be run using the POSIX fixed priority scheduler, and we believe that this solution presents… (more…)

Abstract

RTAI is a real-time kernel that permits to execute, on the same physical machine, both hard real-time applications and the Linux Operating System. RTAI is particularly useful when dealing with real-time processes that needs a guaranteed low response-time to interrupts. (more…)

Abstract

Shielded Processors: Guaranteeing Sub-millisecond Response in Standard Linux By Steve Brosky Chief Scientist Concurrent Computer Systems There has been much good work in making standard Linux into a more responsive system for real-time applications. The low latency patches and the preemption patches have allowed guarantees on worst case interrupt response time at slightly above a… (more…)

Abstract

In this paper I will talk about the needs and requirements to successfully implement telecommunication services under GNU/Linux, particularly in terms of media processing, both for traditional telephone networks and IP based ones, as well as discussing the GNU projects recent efforts in these areas, particularly in the development of stable high performance and scalable RTP transport… (more…)

Abstract

When developing applications under embedded Linux, there is a range of software tools to assist the development process. However, they are so tightly integrated that it is not only difficult to integrate into IDE but hard to add an additional tool. They are communicating with each other through their own protocols so that there is much communication overhead between host and target… (more…)

Abstract

The paper begins with a short description of the Department's real-time course and its required group projects. This is followed by an overview of the hardware and systems software used in a specific real-time control laboratory assignment. After a discussion of the analysis, design, and implementation of the project, the paper concludes with a brief look at future work. (more…)

Abstract

Vendors of modern networking hardware realize that the devices they provide require a great deal of software in order to function effectively. As a result, many hardware vendors provide large amounts of software for use with their devices. However, the prevalent use of the VxWorks operating system has allowed hardware vendors to become careless with the architecture of the driver… (more…)

Abstract

The WIYN Tip-Tilt Module (WTTM) was developed as an adaptive optics solution to image degradation due to atmospheric instability and dynamics. The WTTM was successfully commissioned onto the WIYN 3.5m telescope in February 2002 and it currently undergoing shared risks commissioning. (more…)

Abstract

The programming of real-time applications nowadays involves multitasking using timing demands with microsecond resolution, inter task messaging including semaphores for synchronization of multiple running tasks. For solving this task efficiently a programmer likes to use graphical visualization methods for program flow, messaging and priority dependencies. (more…)

Abstract

RealBOX is a PC104 form factor computer based on a 486DX2 processor with 8MB RAM and 8MB Disk-On-Chip Millenium. MiniRTL operating system boots from Disk-On-Chip and expands itself to RAM when the power is applied to the box. Our initial aim and the motivation behind our work was to have an embedded system with the following critical requirements which were fullfiled:

• … (more…)

Abstract

This paper presents the design for the real-time core of a generic real-time signal acquisition, processing and generation system. The design is generic in the sense that it can be used in a wide variation of application domains, from the PLC logic of MatPLC, over medical signal processing in the RT-Lab project, to the robot motion control of the Orocos project. (more…)

Abstract

RTLab is a software project which provides a cross-variant (RTAI and RTLinux) conceptual framework for biomedical experiment interface. The intent is to provide abstract services on top of RTAI/RTLinux and COMEDI for the rapid development of a certain class of control and measurement applications typical in the biomedical field. (more…)

Abstract

The Units Intensive Cares (UIC) of the Hospitals in Peru, they need of a centralized system that it integrates in a net, the different marks of Lung Ventilator to supervise from oneself place the process of ventilation mechanics, to be a process of high risk; they also need of a graphic monitor of local supervision for the Lung Ventilator that lack this system. (more…)

Abstract

This work presents an implementation of a digital PID (Proportional+ Integral+Differential) controller in a PC machine running RTAI. PID controllers are well known and have a wide range of applications in the control of analog systems such as servomotors. In order to achieve the desired performance the system output (axis position) is feed-back to the PID controller which generates… (more…)

Abstract

Many chemical processes require real-time control and supervision in order to operate them safely and profitably, while satisfying quality and environmental standards. As a means to comply with these requirements, it is common practice to use control software based on a proprietary operating system such as QNX, WxWorks, or MS Windows with real-time extensions. (more…)