Ran a wire from my throttle position sensor to the DL1 a couple of months ago. At first it was ok. Recently I noticed I was getting odd results. The speed of opening and closing the throttle had slowed it now takes 2 sec to open or close the throttle. It looks like the DL1 is recording Integral(TPS).
Tried another channel - same result.
I noticed that the voltage being recorded is +9v to + 15v Voltmeter at the terminals of the DL1 records 1 - 4v
Analog data errors
Very interesting 
It is beyond me to know what electronic malfunction might be behind this. I was thinking Variable Manager settings might be the cause until I read of your strange voltages.
Does sound "integrated".
In the olden days, computers for performing specific functions, as opposed to the early programmable "flip-flop" binary based behemoths, used the physical properties of various electrical and mechanical components as "analogues" of mathematical functions and calculus...
It's probably not going to get your DL1 fixed any quicker 
, but how about directing the Variable Manager's "Advanced Options" to differentiate the signal.
It is beyond me to know what electronic malfunction might be behind this. I was thinking Variable Manager settings might be the cause until I read of your strange voltages.
Does sound "integrated".
In the olden days, computers for performing specific functions, as opposed to the early programmable "flip-flop" binary based behemoths, used the physical properties of various electrical and mechanical components as "analogues" of mathematical functions and calculus...
It's probably not going to get your DL1 fixed any quicker , but how about directing the Variable Manager's "Advanced Options" to differentiate the signal.-
Support
faraday wrote:Very interesting
It is beyond me to know what electronic malfunction might be behind this. I was thinking Variable Manager settings might be the cause until I read of your strange voltages.
Does sound "integrated".
In the olden days, computers for performing specific functions, as opposed to the early programmable "flip-flop" binary based behemoths, used the physical properties of various electrical and mechanical components as "analogues" of mathematical functions and calculus...
Good idea, thanks. I had not looked at those advanced functions before. They will add new dimensions to my analysis. Unfortunately, it is not quite a simple integral, but it is near enough to see on/off gas events more clearly.
Less of the "OLDEN DAYS" I worked on Analogue Computers. Some of us still think that digital is only a fad.
Malcolm
Would analogue computers still find any applications in control of cheap appliances or highly specialised machines, for instance?
If I've ever seen one it was coincidental and not properly appreciated/understood. They received a very brief mention in my first mech eng Control lecture in the early '90s.
.... but that snippet seriously underestimates my vintage
Give me a tube any day...
If I've ever seen one it was coincidental and not properly appreciated/understood. They received a very brief mention in my first mech eng Control lecture in the early '90s.
.... but that snippet seriously underestimates my vintage
Give me a tube any day...
-
Dan in Saint Louis
- Posts: 65
- Joined: Fri Jul 06, 2007 10:26 pm
- Location: Saint Louis, Missouri, USA
As a mechanical engineer you may have heard of PID controllers.faraday wrote:Would analogue computers still find any applications in control of cheap appliances or highly specialised machines, for instance?
And the first computer I ever used was an IBM 650 full of 12AU7's... (or were they 12AT7's?) Rotating magnetic drum memory, 20-ton air conditioning to cool it.
--Dan in Saint Louis
Struth
Did you have to talk to it with punch cards, or was that still to be invented?
PID controllers were as sophisticated a device as the first semester Control course at the University of Melbourne (taken in 3rd year of the mech. eng. 4 yr bach. degree back then) considered.
This was Classical Control, and the nature of things was such that the closest we got to actually using such a thing was in Simulink.
I finished my degree at a "more practical", i.e. less analytical/theoretical institution, not because I could cope less well with the mathematical analysis teaching approach taken there than the other students, but because I ran out of money.
I needed to work more hours than full time study would allow when my wife presented me with a baby. Melbourne's Engineering Faculty would not allow part-timers.
The Swinburne University of Technology degree had no Control in its mech. eng. degree
Of course, Swinny had fewer pracs, because they could not aford to run them.
Engineering education (at least as it applies to Mechanical) in most Australian universities is now a disgrace, but still the occasional competent graduate emerges.
The rot had started before I began, I gather, when secondary school maths standards declined in the late 70's.
During the following two decades, government education funding (all unis are public and until recently tuition fees did not exist) shrunk on a per capita basis.
Industry makes no contribution to undergrad education.
She'll be right, cobber
Did you have to talk to it with punch cards, or was that still to be invented?
PID controllers were as sophisticated a device as the first semester Control course at the University of Melbourne (taken in 3rd year of the mech. eng. 4 yr bach. degree back then) considered.
This was Classical Control, and the nature of things was such that the closest we got to actually using such a thing was in Simulink.
I finished my degree at a "more practical", i.e. less analytical/theoretical institution, not because I could cope less well with the mathematical analysis teaching approach taken there than the other students, but because I ran out of money.
I needed to work more hours than full time study would allow when my wife presented me with a baby. Melbourne's Engineering Faculty would not allow part-timers.
The Swinburne University of Technology degree had no Control in its mech. eng. degree
Of course, Swinny had fewer pracs, because they could not aford to run them.
Engineering education (at least as it applies to Mechanical) in most Australian universities is now a disgrace, but still the occasional competent graduate emerges.
The rot had started before I began, I gather, when secondary school maths standards declined in the late 70's.
During the following two decades, government education funding (all unis are public and until recently tuition fees did not exist) shrunk on a per capita basis.
Industry makes no contribution to undergrad education.
She'll be right, cobber
-
Dan in Saint Louis
- Posts: 65
- Joined: Fri Jul 06, 2007 10:26 pm
- Location: Saint Louis, Missouri, USA
Yes, actually punch cards pre-dated digital computing.faraday wrote:Did you have to talk to it with punch cards, or was that still to be invented?
My alma mater also suffered from this, and there was a period when they had no "physical" labs -- it was all simulation. They soon discovered their mistake.Engineering education (at least as it applies to Mechanical) in most Australian universities is now a disgrace, but still the occasional competent graduate emerges.
The rot had started before I began, I gather, when secondary school maths standards declined in the late 70's.
--Dan in Saint Louis
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