HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  INDUSTRIES  |  FOCUS ON FUNDAMENTALS
  |  REGISTER  |  LOGIN  |  HELP
News
Electronics & Test

Multicore MCUs Gain Automotive Momentum

NO RATINGS
View Comments: Threaded|Newest First|Oldest First
Ivan Kirkpatrick
User Rank
Platinum
Definitely a trend to watch
Ivan Kirkpatrick   10/3/2011 10:00:20 AM
NO RATINGS
I can see a lot of advantages in multicore processors like these.  I wonder though about the fault tolerance for a device that uses two cores and compares the results?  I would think 3 cores and voting the odd one out might be slightly more expensive but better.  Along those same lines the fault tolerance and ability to function in a degraded state might be really useful as well.  Sensor failure or errors related to the sensors need to be accommodated as well in a fault tolerant manner.

I am a bit leary of simply adding in more redundancy.  That can also lead to more failures.  Correct me if I am wrong but 2 controllers with 99% reliability each when coupled are they not then 98% reliable?

In general I learned it was better to design systems with greater reliability, test it and prove it historically in production.  Then only add additional redundancy if it was really required.  Some systems required redundancy as a matter of course in terms of availability for maintenance and mission critical applications.  Perhaps others can weigh in on this and explain this subject a little better.  

I suppose part of this is the diffference between redundant and backup components?  When I served on US Navy ships we had three steam driven turbogenerators for redundancy and a diesel generator for backup.  But we had only one main engine.  I know the costs figure into this as well as they always do.

Senerjp
User Rank
Iron
Re: Definitely a trend to watch
Senerjp   10/4/2011 10:18:46 AM
NO RATINGS
Two controllers, if they are truly ustilizing multi-pathing, would actually act in parallel and would be more reliable. R = 1-(1-R)^n so to the extent they are completely seperate ( which nothing ever truly is) they would approximate R=.9999!

Partner Zone
Latest Analysis
The phablet wars continue. Today we welcome the Nexus 6 -- a joint collaboration between Google and Motorola.
According to a study by the National Institute of Standards and Technology, one of the factors in the collapse of the original World Trade Center towers on Sept. 11, 2001, was the reduction in the yield strength of the steel reinforcement as a result of the high temperatures of the fire and the loss of thermal insulation.
If you have a Gadget Freak project, we have a reader who wants to make it. And not only will you get your 15 minutes of fame on our website and social media channels, you will also receive $500 and be automatically entered into the 2015 Gadget Freak of the Year contest.
Robots are getting more agile and automation systems are becoming more complex. Yet the most impressive development in robotics and automation is increased intelligence. Machines in automation are increasingly able to analyze huge amounts of data. They are often able to see, speak, even imitate patterns of human thinking. Researchers at European Automation call this deep learning.
Thanksgiving is a time for family. A time for togetherness. A time for… tech?
More:Blogs|News
Design News Webinar Series
11/19/2014 11:00 a.m. California / 2:00 p.m. New York
11/6/2014 11:00 a.m. California / 2:00 p.m. New York
10/7/2014 8:00 a.m. California / 11:00 a.m. New York
12/11/2014 8:00 a.m. California / 11:00 a.m. New York
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
Dec 1 - 5, An Introduction to Embedded Software Architecture and Design
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  6


Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.
Last Archived Class
Sponsored by Littelfuse
Learn More   |   Login   |   Archived Classes
Twitter Feed
Design News Twitter Feed
Like Us on Facebook

Sponsored Content

Technology Marketplace

Copyright © 2014 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service