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Search: Posts Made By: RR_NDB
Showing results 1 to 35 of 53
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Forum: Tech Log
6th Jul 2011, 01:07
Replies: 1,069
Views: 280,319
Posted By RR_NDB

Partner transparency or opacity?

bearfoil

Question: During their ordeal the System presented a transparent (an clear) picture to the poor guys? :confused: They were informed why the plane "degraded". They were reliably informed...
Forum: Tech Log
6th Jul 2011, 00:47
Replies: 1,069
Views: 280,319
Posted By RR_NDB

When working in maintenance (since i was 15) i...

When working in maintenance (since i was 15) i learned we canīt be biased because can led you to fail. In one case i considered impossible a fault to be caused by a certain part. After several days...
Forum: Tech Log
5th Jul 2011, 23:30
Replies: 1,069
Views: 280,319
Posted By RR_NDB

"considered as of negligible probability in the a/c System design"

If the crew realized, in the very beginning there was a serious AS measurement failure this would help the PF to act "better"? As per BEA he executed "persistent NU..."


The important...
Forum: Tech Log
5th Jul 2011, 23:06
Replies: 1,069
Views: 280,319
Posted By RR_NDB

Loss of important* elements

PJ2,

The reason of my question was because i always considered useful, we could say, important and in extreme cases, crucial to know what triggered a change in normal conditions. In at least two...
Forum: Tech Log
5th Jul 2011, 21:07
Replies: 1,069
Views: 280,319
Posted By RR_NDB

Simultaneous failure of important* elements

Is there any indication if the PF (and PNF) understood the cause of the Law change was the simultaneous failure of AS sensors? (considered as of negligible probability in the a/c System design) I.e....
Forum: Tech Log
5th Jul 2011, 20:40
Replies: 1,069
Views: 280,319
Posted By RR_NDB

FDR recording (or not) internal System details

PJ2

With the growing complexity of Systems, intended to a safe, reliable and efficient operation of the airplane and with this inexorable trend to spread even to smaller planes, my feeling is:...
Forum: Tech Log
5th Jul 2011, 18:13
Replies: 1,069
Views: 280,319
Posted By RR_NDB

"where the application of technology is taking us" (Av)

syseng68k

R&D is necessary! Not a simple Development.



With the trend towards System complexity this may get worse. Again, R&D is necessary! Not a simple Development.
Forum: Tech Log
5th Jul 2011, 18:12
Replies: 1,069
Views: 280,319
Posted By RR_NDB

I can now prepare to present some ideas

PJ2



My concern is about important internal (volatile) info that would be lost (if you donīt record it). Without this approach you may face situations (during the investigation) that do not...
Forum: Tech Log
5th Jul 2011, 13:46
Replies: 1,069
Views: 280,319
Posted By RR_NDB

Intriguing climb, current FDR capabilities and AF447 analysis

PJ2 and CJ in recent posts, commented on FDR capabilities:




I need to present 3 (conceptual) questions (important to the analysis and understanding of the intriguing climb):

1) All...
Forum: Tech Log
4th Jul 2011, 21:13
Replies: 1,069
Views: 280,319
Posted By RR_NDB

K.I.S.S. plane behavior in all situations

gums

What we need is a well-designed plane that has basic control laws that 99.9% of the pilots can fly using basic airmanship. And not be concerned with losing one thing or the other along the...
Forum: Tech Log
4th Jul 2011, 20:50
Replies: 1,069
Views: 280,319
Posted By RR_NDB

Moore īs law affecting all designs

Hi,

DW

:}
Forum: Tech Log
4th Jul 2011, 20:47
Replies: 1,069
Views: 280,319
Posted By RR_NDB

All the required data is available with current FDRīs?

Hi,
DW, The use of the "obsolete" building blocks is not a reason to allow a simpler analysis, as you know. My concern is if we really have a "sufficient recording" to understand EVERYTHING that...
Forum: Tech Log
4th Jul 2011, 06:43
Replies: 1,069
Views: 280,319
Posted By RR_NDB

Sorry RR_NDB but I'm not understanding what your saying.

My objective now is to clarify to allow a perfect understanding of what i said (briefly in a short text). As i told you i will elaborate later.

I will start from your last phrase, a question:

...
Forum: Tech Log
4th Jul 2011, 01:02
Replies: 1,069
Views: 280,319
Posted By RR_NDB

Why the "pitch up"

Hi,

PJ2

Indeed, so far, a mystery.

On the recording (video never) i will elaborate in next post. The idea is:

We probably should (for the investigation) to record some "internal...
Forum: Tech Log
4th Jul 2011, 00:20
Replies: 1,069
Views: 280,319
Posted By RR_NDB

Causality

A33Zab

Yes, Real Time! Itīs technically possible today*!

PREDICTIVE, unfortunately itīs not possible, as we all know.

Please, see Causality, here. (http://en.wikipedia.org/wiki/Causality)
...
Forum: Tech Log
3rd Jul 2011, 15:16
Replies: 1,069
Views: 280,319
Posted By RR_NDB

Complex Systems diagnosability and testability

Another "great feature" of "advanced planes". In some situations you may not be capable to even imagine what happened when analyzing a "mysterious" case.

I hope we will be able to understand the...
Forum: Tech Log
3rd Jul 2011, 14:51
Replies: 1,069
Views: 280,319
Posted By RR_NDB

Far less messages than possible failures

Safety Concerns

And in your opinion what this msg could indicate? The FDR is "not designed" for this type of data. So, BEA and Airbus SAS could never understand what caused it?
Forum: Tech Log
3rd Jul 2011, 14:43
Replies: 1,069
Views: 280,319
Posted By RR_NDB

Real time information to the crew

DozyWannabe

"Redundancy is "powerful" when critical elements do not fail simultaneously. And UAS cases show clearly simultaneous "failing" (due product limitation) Simultaneous "failure" of...
Forum: Tech Log
3rd Jul 2011, 13:33
Replies: 1,069
Views: 280,319
Posted By RR_NDB

Dealing with UAS

mm43 :ok:

It sounds very good for short duration AS issues at cruise.

Other (even less precise redundant method) AS information could "help".
Forum: Tech Log
3rd Jul 2011, 12:08
Replies: 1,069
Views: 280,319
Posted By RR_NDB

Human machine interface and lost information

Machinbird :ok:

CONF iture There is also a technical reason for this: Technically speaking iīm not sure it would be possible to go deep by lack of data (recorded information). During the critical...
Forum: Tech Log
3rd Jul 2011, 00:50
Replies: 1,069
Views: 280,319
Posted By RR_NDB

Murphy law specter to complex machines

jcjeant

Using this kind of approach you are designing machines that can transition very fast from Normal Law directly to "Murphy Law" conditions, where interfacing issues, etc. could fill the...
Forum: Tech Log
3rd Jul 2011, 00:31
Replies: 1,069
Views: 280,319
Posted By RR_NDB

Immediate a/c feeling to the crew

Hi,

poorjohn

20 years ago i had an incident at night under rain conditions (with no consequences) and made very deep analysis starting next day at 8 AM.

This car had an abnormal position of...
Forum: Tech Log
2nd Jul 2011, 23:21
Replies: 1,069
Views: 280,319
Posted By RR_NDB

Real time information to the crew

RetiredF4 Thatīs why i remembered to be technically feasible to have the information even some time (seconds) before System "reconfig".



I hope the advanced planes designers (A, B or ...Z)...
Forum: Tech Log
2nd Jul 2011, 23:02
Replies: 1,069
Views: 280,319
Posted By RR_NDB

Interfacing issue

Cool Guys

We dontīt have yet the required information to be able to understand what really happened in AF447. During 2 years + diligent professionals are trying to "model" possible scenarios...
Forum: Tech Log
2nd Jul 2011, 16:43
Replies: 1,069
Views: 280,319
Posted By RR_NDB

Human machine interface issues and redundancy

BOAC

Certainly the System must be predictable to not add extra issues specially when we are facing extreme conditions. And this "predictability" is intrinsically related to "testability" and in...
Forum: Tech Log
2nd Jul 2011, 14:26
Replies: 1,069
Views: 280,319
Posted By RR_NDB

Causality

Linktrained,

Technically speaking we perhaps could anticipate just in the "seconds range" (before System degradation). Allowing the PF to prior known the reason for Law change. The rationale is...
Forum: Tech Log
2nd Jul 2011, 14:10
Replies: 1,069
Views: 280,319
Posted By RR_NDB

Causality

PA 18 151,

Technically speaking (from an instrumentation point of view) this figure can be negative. I.e. you receive the information on UAS before you lost AP, etc. I commented something...
Forum: Tech Log
2nd Jul 2011, 13:36
Replies: 1,069
Views: 280,319
Posted By RR_NDB

Adequate redundancy (always under K.I.S.S. constraints)

A33Zab, the point is: We must consider in the System design (a/c+crew operation) everything to avoid going straight from "Normal Law" to "Murphyīs Law":}

And remember, i am against the...
Forum: Tech Log
2nd Jul 2011, 13:05
Replies: 1,069
Views: 280,319
Posted By RR_NDB

Diversity of methods and Pattern Recognition

Machinbird

In dealing with the product limitation of current Pitotīs, Diversity could be implemented (for "brief" AS fluctuactions) and probably could be better than the use of a "memory mode"...
Forum: Tech Log
2nd Jul 2011, 03:23
Replies: 1,069
Views: 280,319
Posted By RR_NDB

Redundancy, Fault Tolerance and Graceful Degradation

Lomapaseo

Chris Scott
PJ2,

mm43, Allowing the crew to "monitor" small "crisis", raises the alert level and allows learning from subtle events that are routine (masked by System processing...
Forum: Tech Log
1st Jul 2011, 16:41
Replies: 1,069
Views: 280,319
Posted By RR_NDB

Why use redundancy in a System design

Hi,

When you have 3, 5, 7, (odd number), etc. critical elements, your System is able to:

1. Compare elements trying to figure out the “truth” i.e. their correct “output”
2. “Vote” to select...
Forum: Tech Log
1st Jul 2011, 15:30
Replies: 1,069
Views: 280,319
Posted By RR_NDB

NW and TAM incidents

jcjeant,
(http://www.pprune.org/tech-log/454653-af-447-thread-no-4-a-30.html#post6545615)

Thanks link.
Forum: Tech Log
1st Jul 2011, 15:26
Replies: 1,069
Views: 280,319
Posted By RR_NDB

UAS early warning

Chris Scott, (http://www.pprune.org/tech-log/454653-af-447-thread-no-4-a-31.html#post6546852)



It seems useful immediately warn the crew when "UAS starts". I suspect F-GZCP was not equipped...
Forum: Tech Log
29th Jun 2011, 15:00
Replies: 1,069
Views: 280,319
Posted By RR_NDB

Redundancy concept

infrequentflyer789, Please refer first to my post here (http://www.pprune.org/tech-log/454653-af-447-thread-no-4-a-27.html#post6542961) made when answering to A33Zab

Why not to have before...
Forum: Tech Log
29th Jun 2011, 14:27
Replies: 1,069
Views: 280,319
Posted By RR_NDB

Assertivity

We are here for many reasons. One of the main is for express ASAP our (professional) intuition, feelings, perception, etc. based in what we learned up today. To go direct to the "solutions phase" i...
Showing results 1 to 35 of 53
 
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