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100 – System Health Management
In this 100th episode of omega tau we talk to Dr. Stephen B. Johnson about system health management, a set of techniques and processes used to improve system dependability. The episode is based on a book Stephen co-edited, and as a consequence of Stephen’s background, we use aerospace examples in this episode. We discuss the fundamental concepts such as functions, states and the state vector, failures and faults. We then discuss the influence of complexity on failures, as well as human involvement. We discuss means to prevent failures such as fault isolation, redundancy and model adjustment. We conclude the three-hour conversation by looking at the future of systems engineering and system health management with a particular focus on formal methods.
If you are interested in fault tolerance in software, I suggest you listen to part 1 and part 2 of the interview with Bob Hanmer on SE Radio.
- Dr. Stephen B. Johnson
- System Health Management (Book)
- UCCS Center for Space Studies
- University of Colorado, Colorado Springs (UCCS)
- NASA Marshall
- Wernher von Braun
- ARES Rockets
- ARES 1 (omega tau 23)
- NASA Johnson
- Constellation Program
- Orion multi-purpose crew vehicle
- Space Launch System (SLS)
- Reliability
- Availability
- Safety
- Function
- Mars Explorer Rover
- Voyager 2
- Space Shuttle Columbia disaster
- Thiokol
- Emergence
- Chaos Theory
- Pioneer 10
- Viking Spacecraft
- Quality Assurance
- Taguchi Methods
- Fault Tolerance
- RTG
- Control Theory
- Robust Control
- Reaction Wheel
- Magellan
- EDAC
- IMU
- Axel van Lamsweerde
- yyyyyyy
- Turbo Pump
- FMEA
- Reliability Block Diagram
- Directed Graph
- Fault Tree Analysis (FTA)
- Controlled Natural Language
- SysML
- C
- Ada
- Game Theory
Posted: August 3rd, 2012 under podcast, podcast (en).
Tags: aviation, complexity, control systems, space, systems engineering
Comments
Comment from MaNo
Time August 4, 2012 at 10:35 pm
Agree, this is indeed a pity!
Comment from Colin Pearson
Time August 6, 2012 at 6:12 pm
Congratulations Markus and Nora on reaching 100 podcasts! Thank you for 100 thrilling and informative ventures into fields of engineering that so few of us would ever meet ‘up close’. This “100th” was especially well-paced. Your warm rapport with Dr. Stephen Johnson was clear, and his fully-engaged responses to your questions were absolutely in accord with your own generous philosophy of “sharing what we know”! Thankyou!
Comment from MaNo
Time August 6, 2012 at 6:19 pm
Thank you Colin :-)
Markus
Comment from Geoffrey
Time December 6, 2012 at 12:41 pm
Good to join in with the Happy Birthday melody. It really is something worth celebrating. You must be pleased with having made the effort to embark on your omega tau project. I am just one of many who are grateful for you having done so. The interview wasn’t one of your best though. No fault of yours. With all due respect, I thought Dr Johnson was a little too pontificous, quite verbose and sometimes repetitious. He didn’t really engage with you as most of the other people you have been talking with have. At least, it didn’t appear to from my point of view. I mean, how long can one go on and on about plain old common-sense. I thought his argument about not knowing enough of a system when talking about the kite design was arrogant. As a philosopher and a scientist he should aware of the limitations of knowledge. Looking forward to more talks though. Have you thought about covering those small unmanned submarine things that can go down deep in the oceans? I would also like to hear someone talk about the effects of the moon on volcanic eruptions and earthquakes. Gravity alone should have some effect on the movement of rocks. And when the moon is at its closest the huge tides should shift a lot of around which will cause extra forces on the crust.
Comment from MaNo
Time December 6, 2012 at 1:28 pm
# Good to join in with the Happy Birthday melody.
# It really is something worth celebrating.
# You must be pleased with having made the effort
# to embark on your omega tau project.
I am. It is really a lot of fun, lets me visit many interesting places.
# With all due respect, I thought Dr Johnson was a little too pontificous,
# quite verbose and sometimes repetitious.
I can see where you’re coming from. I did like his conceptual/philosophical
approach to things, but yes, it was a bit too long-winded.
# Have you thought about covering those small unmanned submarine things
# that can go down deep in the oceans?
do you have a link on what you’re thinking about specifically?
# I would also like to hear someone talk about the effects of the moon on volcanic
# eruptions and earthquakes. Gravity alone should have some effect on the movement
# of rocks. And when the moon is at its closest the huge tides should shift a
# lot of around which will cause extra forces on the crust.
That’s a very specific topic – wondering what the somewhat bigger picture
could be into which this would fit in. We’ve already had a (german) episode
on seismology…
Thanks for all your comments, Geoffrey :-)
Markus
Comment from Ido
Time August 4, 2012 at 8:24 pm
Great Podcast and congratulations on your anniversary :) | Its a real pitty that such books are always that expensive; would have been a realy, realy interesting read.