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Search: Posts Made By: Sim25
Showing results 1 to 35 of 38
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Forum: Tech Log
4th May 2024, 17:43
Replies: 24
Views: 2,694
Posted By Sim25

See https://arc.aiaa.org/doi/10.2514/6.1989-3594...

See https://arc.aiaa.org/doi/10.2514/6.1989-3594 for reference...
Forum: Tech Log
4th May 2024, 17:41
Replies: 24
Views: 2,694
Posted By Sim25

This isn't opposed to what I was saying :) ...

This isn't opposed to what I was saying :)
Again the pilots input is integrated so the aircraft behaves the way it's described...
Forum: Tech Log
4th May 2024, 17:39
Replies: 24
Views: 2,694
Posted By Sim25

I don't see why under normal conditions it...

I don't see why under normal conditions it shouldn't.
Forum: Tech Log
4th May 2024, 14:39
Replies: 24
Views: 2,694
Posted By Sim25

Regarding the c* law: ...

Regarding the c* law:
https://cimg9.ibsrv.net/gimg/pprune.org-vbulletin/664x267/cstar_law2_ac08d259c0aa34e740788989b5a873312787b622.jpg
Source: Flugregelung - Brockhaus, Alles, Luckner...
Forum: Tech Log
4th May 2024, 07:51
Replies: 24
Views: 2,694
Posted By Sim25

That's not correct. Roll law is a roll angle...

That's not correct. Roll law is a roll angle target law. Pilot's order is integrated... If disturbance causes the plane to leave the target it will go back, without pilot intervention.
Forum: Tech Log
31st Mar 2024, 08:23
Replies: 10
Views: 1,564
Posted By Sim25

I would then expect spoiler 2 to follow the order...

I would then expect spoiler 2 to follow the order and spoiler 4 stays inhibited. That’s most likely why the ecam memo/fault whatever is generated…
Forum: Tech Log
30th Mar 2024, 09:25
Replies: 10
Views: 1,564
Posted By Sim25

Just out of curiosity: Next time you are in the...

Just out of curiosity: Next time you are in the sim, try the following (if they let you): G-B fail, as you already did and then switch off ELAC2. SEC becomes active on elevator and then try again...
Forum: Tech Log
25th Mar 2024, 16:53
Replies: 10
Views: 1,564
Posted By Sim25

When GB is lost you end in single elevator...

When GB is lost you end in single elevator operation :)
Forum: Tech Log
25th Mar 2024, 14:52
Replies: 10
Views: 1,564
Posted By Sim25

No, speedbrake is inhibited, if the lever is...

No, speedbrake is inhibited, if the lever is moved nothing happens...

Hope I could help

Simon
Forum: Tech Log
29th Feb 2024, 09:54
Replies: 22
Views: 3,532
Posted By Sim25

100% true. That's also something that's often...

100% true. That's also something that's often mistaken. In pitch most conventional ACs provide a varying (with speed and sometimes trim) artificial feedback. => Varying spring-force curve. In roll...
Forum: Tech Log
29th Feb 2024, 08:44
Replies: 22
Views: 3,532
Posted By Sim25

You are talking about this incident:...

You are talking about this incident: https://assets.publishing.service.gov.uk/media/62e925308fa8f5033906b7f4/Airbus_A350-1041_G-XWBC_09-22.pdf ?

Ok, then let's first define what I was talking...
Forum: Tech Log
28th Feb 2024, 16:36
Replies: 22
Views: 3,532
Posted By Sim25

Yep, for Airbus systems the latency is fixed and...

Yep, for Airbus systems the latency is fixed and pretty small. Load of a computer doesn't change that much.
Forum: Tech Log
28th Feb 2024, 16:32
Replies: 22
Views: 3,532
Posted By Sim25

That's not how rate limiting is applied/ works......

That's not how rate limiting is applied/ works...
The second example is the exact one.
Apart from that: On ground (direct law active) spoiler deployment is limited to 40°/s, elevator deflection...
Forum: Tech Log
20th Feb 2024, 07:26
Replies: 24
Views: 2,694
Posted By Sim25

Have a look at this thread:...

Have a look at this thread: https://www.pprune.org/tech-log/656151-a320-aileron-authority-conf-3-vs-conf-full.html
Forum: Tech Log
29th Jan 2024, 16:19
Replies: 19
Views: 2,826
Posted By Sim25

Elevator travel is restricted with speed in...

Elevator travel is restricted with speed in single elevator operation: Simmilar to rudder travel limiting. Max authority is regained at 130knts. Doesn't matter if in direct law or alternate......
Forum: Tech Log
6th Jan 2024, 09:53
Replies: 9
Views: 2,417
Posted By Sim25

ACEs can't be ruled out, as they provide the...

ACEs can't be ruled out, as they provide the interface to the hydraulic servo controls and the interface to the yoke.
For further reference/reading:...
Forum: Tech Log
4th Dec 2023, 06:57
Replies: 26
Views: 4,151
Posted By Sim25

To me that doesn't make sense. With this in mind,...

To me that doesn't make sense. With this in mind, how could they have implemented the positive stability for higher roll angles, as the aircraft then (uncommanded) returns to 33? :confused:

With...
Forum: Tech Log
3rd Dec 2023, 18:45
Replies: 26
Views: 4,151
Posted By Sim25

More or less yes. Airbus use a roll rate control...

More or less yes. Airbus use a roll rate control law, though that's not what the loop is really controlling:
What you input with the stick is first integrated (rate to angle conversion) and the loop...
Forum: Tech Log
3rd Dec 2023, 11:26
Replies: 26
Views: 4,151
Posted By Sim25

Just have a look at this document, maybe it...

Just have a look at this document, maybe it clarifies a few things: https://arc.aiaa.org/doi/10.2514/6.1989-3594

The graphs presented in the accident report aren't what the ailerons/spoilers do...
Forum: Tech Log
23rd Nov 2023, 07:23
Replies: 12
Views: 1,656
Posted By Sim25

Glad I could help :) I attached a plot of the...

Glad I could help :)
I attached a plot of the response of the THS model implemented on the SECs to monitor the true THS position. Maybe this gives an impression on how the system reacts to trim...
Forum: Tech Log
22nd Nov 2023, 13:19
Replies: 12
Views: 1,656
Posted By Sim25

Mostly right yes. When somebody moves the trim...

Mostly right yes. When somebody moves the trim wheel, or the aircraft auto trims (via the electrical motors) a mechanical gear mechanism is rotated which in turn "srews open" a hydraulic valve block...
Forum: Tech Log
9th Oct 2023, 18:39
Replies: 12
Views: 1,881
Posted By Sim25

The FMG(E)Cs are a little complex. Honeywell made...

The FMG(E)Cs are a little complex. Honeywell made their own FMS board set for these units, with their software running on it. This should be, what's in the pdf you linked. Yet Thales definitely...
Forum: Tech Log
9th Oct 2023, 14:44
Replies: 12
Views: 1,881
Posted By Sim25

OK, this is becoming annoying.. I asked an ATA22...

OK, this is becoming annoying.. I asked an ATA22 Airbus engineer, this is what he told me:

for both SA and LR:
THAV makes the hardware.
AIRBUS makes the FG(E) software
THAV and HWL make the FMS...
Forum: Tech Log
7th Oct 2023, 06:09
Replies: 12
Views: 1,881
Posted By Sim25

First I made a mistake in my first post. What I...

First I made a mistake in my first post. What I meant was: FM part boards (hardware) and SOFTWARE can be different (from different suppliers). Yet it seems to me that there might be a combination of...
Forum: Tech Log
6th Oct 2023, 10:39
Replies: 12
Views: 1,881
Posted By Sim25

Have a look at this:...

Have a look at this: https://www.lufthansa-aviation-training.com/-/ffs-airbus-a320-200-ft66
Real fleet should be the same as training devices...

Btw. FMGC is always the same, only the FM part...
Forum: Tech Log
1st Oct 2023, 08:26
Replies: 12
Views: 2,186
Posted By Sim25

For normal law: I can't say if the stick is...

For normal law:
I can't say if the stick is linear mapped to the 0 to 15 deg/s, but there is a high possibility that it isn't. In SEC alternate law pitch, which is the same c*law as in normal law...
Forum: Tech Log
1st Oct 2023, 07:23
Replies: 7
Views: 1,789
Posted By Sim25

Maybe a little detail regarding the topic: In...

Maybe a little detail regarding the topic:
In SEC runaway and jamming is detected the following:
SEC MON is computing a theoretical THS position, that is basically the commanded THS position out of...
Forum: Tech Log
1st Oct 2023, 07:05
Replies: 7
Views: 1,789
Posted By Sim25

That's correct. Same for elevator control... ...

That's correct. Same for elevator control...
THS runaway is monitored by the computer controlling it, so there is no need to add switches...
Forum: Engineers & Technicians
15th Jun 2023, 19:51
Replies: 5
Views: 859
Posted By Sim25

Hi Adrian, do you mind sharing the manual? My...

Hi Adrian,
do you mind sharing the manual? My unit is a crt, but it would be interesting to have a look at it. How is the LCD-DU connected with the DMC? Regarding DSDL I suppose it might be...
Forum: Engineers & Technicians
15th Jun 2023, 16:58
Replies: 5
Views: 859
Posted By Sim25

Hi, I can't help you out, but are you sure that...

Hi,
I can't help you out, but are you sure that the unit doesn't get any digital data signal via the other (not coax) pins? I have a Airbus CRT Display Unit together with a DMC here and there is a...
Forum: Engineers & Technicians
24th May 2023, 16:23
Replies: 9
Views: 1,310
Posted By Sim25

That being said: When the unit starts up the...

That being said: When the unit starts up the logic is tested by software, by the CPUs, which can be seen below......
Forum: Engineers & Technicians
24th May 2023, 16:17
Replies: 9
Views: 1,310
Posted By Sim25

Quick update: The relay flickering is part of...

Quick update:
The relay flickering is part of the self test. It's because the drive signal is hardware generated by logic. Seems that there is no mechanism to disable the relays while tests are...
Forum: Engineers & Technicians
22nd May 2023, 11:03
Replies: 9
Views: 1,310
Posted By Sim25

@Zar_1 Again thank you for the compliment....

@Zar_1 Again thank you for the compliment. Really appreciate it! :)
The way one could really help is: Information.

At the moment I'm dealing with the startup routine, the "boot sequence" if you...
Forum: Tech Log
8th May 2023, 16:54
Replies: 8
Views: 1,989
Posted By Sim25

Hi, that's not 100% correct. The CEO also uses...

Hi, that's not 100% correct.
The CEO also uses a C*Law, so pitch rate at low speed, g load at higher speeds. (Pitch rate feedback gain is slowly reduced with speed, btw. in alternate law pitch rate...
Forum: Engineers & Technicians
26th Mar 2023, 18:53
Replies: 9
Views: 1,310
Posted By Sim25

The computer is now running. No fatal errors. At...

The computer is now running. No fatal errors. At least none, that would made the machine enter the error handler.
It took some time, because I had to build my own Arinc429 receiver. The Holts I...
Showing results 1 to 35 of 38
 
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