DDS

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Mon, 01/20/2020 - 05:47
#1
achabab97
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Crashing out the box with matrix struct in IDL

Hello,

I am attempting to send images across DDS, to do so I'd like to make a struct comprising of just a matrix. In the IDL I'm doing

    struct imgType{
        unsigned long imgMat[1224][1025];
    };

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Making DDS Really Real-Time with OpenFlow

https://dl.acm.org/citation.cfm?doid=2968478.2968479

An increasing amount of distributed real-time systems and other critical infrastructure now rely on Data Distribution Service (DDS) middleware for timely dissementation of data between system nodes. While DDS has been designed specifically for use in distributed real-time systems and exposes a number of QoS properties to programmers, DDS fails to lift time fully into the programming abstraction. The reason for this is simple: DDS cannot directly control the underlying network to ensure that messages always arrive to their destination on time.

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2016
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PDF icon 2016_making_dds_really_real-time_openflow.pdf

Multi-Level Time-Sensitive Networking (TSN) Using the Data Distribution Services (DDS) for Synchronized Three-Phase Measurement Data Transfer

https://ieeexplore.ieee.org/abstract/document/8823854

This paper presents the design and implementation of a Multi-level Time Sensitive Networking (TSN) protocol based on a real-time communication platform utilizing Data Distribution Service (DDS) middleware for data transfer of synchronous three phase measurement data. To transfer ultra-high three phase measurement samples, the DDS open-source protocol is exploited to shape the network’s data traffic according to specific Quality of Service (QoS) profiles, leading to low packet loss and low latency by synchronizing and prioritizing the data in the network.

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Publication Year: 
2019
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PDF icon dds_and_tsn_ieee_08823854.pdf

Autopilot for Robocar

https://secretaria.uvigo.gal/docnet-nuevo/guia_docent/?centre=305&ensenyament=V0...

At the University of Vigo's telecommunications engineering school, students learn the mathematical and physical principles that are necessary to understand telecommunication systems. We also teach them different programming languages, design tools, or in general, how to use computer based and electronic tools to build these communication systems.

In the final year of undergraduate studies, in the subject "Embedded Systems Design", we ask students to design and build a small autonomous vehicle (a quadcopter or a robocar). To do this, they must first create an "autopilot" to manage the information from the sensors, distribute it to the various information processing and decision making systems and finally apply the control commands.

The students build a distributed system in which they use RTI Connext DDS to exchange information between the different blocks of software.


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Wed, 09/04/2019 - 15:20
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ctbrown
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Issue with rticonnextdds-connector: Python writer.py only able to write 296 times

Hi,

I’m relatively new to the whole DDS world so I’m hoping someone more experienced will know this off the top of their head. I mostly work in python on various data science topics. Recently there has been need for one of our pyrton scripts to communicate via DDS with embedded hardware.

Therefore the python library provided as part of the rticonnextdds-connector package looks quite appealing.

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Mon, 07/22/2019 - 23:56
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rohitrx4
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Application Crash with large scale data. Error:DDS.Retcode_OutOfResources- virtual sample not found

I have CAD application where i am tring to publish and subcribe from one CAD machine to other CAD machine. I can able to publish and subscribe the data but when i work with same application for a day , there was only one instance where I saw the CAD got crashed.I can see following exception been created

7-22-2019 21:46:44.529 DDS.Retcode_OutOfResources:

 [1563850004.528993] U0000000000000e20

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Control Communications with DDS using IEC61499 Service Interface Function Blocks

https://ieeexplore.ieee.org/abstract/document/5641207

The IEC61499 is an open standard for distributed control and automation. The interface between control software and hardware or communications is achieved by means of the so-called Service Interface Function Blocks (SIFB).

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Publication Year: 
2010
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PDF icon control_communications_with_dds_using_iec61499.pdf
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Tue, 05/07/2019 - 02:02
#1
jose
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We are back in Munich!
The Connext Con is coming back to Munich! Plus, I will be joining the RTI crew at the conference for the second consecutive year.
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Using DDS in UAV Control Stations

Submitted by admin on Tue, 04/09/2019 - 07:49
URL: 
https://www.omg.org/cgi-bin/doc?omg%2F19-03-19.pdf

Describes the devekopment of UAV Control Station by Raytheon:

  • The control stations provide command and control of an unmanned air vehicle (UAV)
  • A common control station controls more than one type of UAV
  • A control station is made up of a set of service
  • Services defined by the Unmanned Systems (UxS) Control Segment (UCS) Architecture standard. Some common to all vehicles and some unique to a single vehicle

UAV Control Systems belong to a class of systems that require:

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Mon, 01/14/2019 - 10:46
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madelinet
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Late-Subscribers not receiving DDS Messages LabVIEW

 

My project involves using RTI DDS (v2.2.0) in multiple different LabVIEW applications, some of which are running on the same PC and some of which are running on other PCs or RTs.  My goal is to have each application keep a record of all applications that are currently communicating on the same DDS Domain.

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