Emergency braking system fault

ICE, Equipment, Options
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PJB729
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Re: Emergency braking system fault

Post by PJB729 » Wed Oct 09, 2019 9:03 am

calnorth wrote:
Wed Oct 09, 2019 7:01 am
I think a prescribed area is "viewed" and conditioned in terms of doppler shift and object proximity. Whats moving in relation to the car and whats near enough to physically contact...all within prescribed parameters. The car with sensors is moving also. Parameters are fixed/acquired within the software (constants) which establish baselines to calculate difference. Differences give rise to actions such as alarm/avoidance tactics.

I'm trying to imagine the field of view response as a running series of digital snapshots that are compared on the fly. Quality decisions are made and filtering them as regards relevance must be somewhat tricky? I've just talked myself out of having that stuff.
The decisions made must also deal with the unknown\indecipherable after which the default "safe" mode must be to put the bakes on. There may conditions where the "safe" mode might put the driver at risk, us humans would not expect a car to suddenly apply the brakes when the road ahead is, to us, clear.
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calnorth
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Re: Emergency braking system fault

Post by calnorth » Wed Oct 09, 2019 9:55 am

Thoughts:
An earlier debate moved to a place where Boeing and Airbus aircraft had significant control differences. Its where events lead to areas that only humans can reliably act or are able to act out of safe place. The aircraft has to be operated out of its safe operating parameters or performance zone. Software control we know will/can prevent that extreme and sudden requirement. Airbus was caught up here with its fly by wire features. Boeing didn't do that. Not sure what they do now...the 777 Max has caused quite some alarm.

Anyway, human pilot experience became the sales argument and I suppose this "experience" thing is whats meant by incorporating AI for vehicle control.

Where the cars critical functions are under auto control (brakes/steering/engine) the system may not release its control having voted to "go for it". Emergency action has to be taken but realisation speed and decoupling method will likely take too long...bang! Aircraft usually have a good bit of "headroom" here.

I understand the trade offs generally and that the nut at the end of the wheel needs defeating...not all of them though?
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PJB729
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Re: Emergency braking system fault

Post by PJB729 » Wed Oct 09, 2019 10:12 am

With regards to the 777 max I do wonder if the designer thought of everything except the human interaction element. Us humans have a history of being unpredictable yes they do write algorithms that predict human behaviour and they are good MOST of the time. If I’m on a 777 max most of the time isn’t good enough, on the flip side even pilots can decide to fly into hillsides or commit suicide taking their passengers with them.
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calnorth
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Re: Emergency braking system fault

Post by calnorth » Wed Oct 09, 2019 10:46 am

PJB729 wrote:
Wed Oct 09, 2019 10:12 am
With regards to the 777 max I do wonder if the designer thought of everything except the human interaction element. Us humans have a history of being unpredictable yes they do write algorithms that predict human behaviour and they are good MOST of the time. If I’m on a 777 max most of the time isn’t good enough, on the flip side even pilots can decide to fly into hillsides or commit suicide taking their passengers with them.
Yep...there's quite a few crew errors on the Aircraft Accident vids. The human is factored in hence the Boeing/Airbus comparison where Airbus fairly left the human out. Its often a series of errors because single points are the prime targets of safety.

Mostly confusion from instruments and bad pilots. I'm very surprised at Boeing though and the FAA. With the Fake/crap news about I can't make head nor tail of it. It heads off to a deliberate attack on Boeing?
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Qashpad
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Re: Emergency braking system fault

Post by Qashpad » Thu Oct 10, 2019 6:25 pm

Had this blocked radar message flash up erratically over the past few weeks. Phoned Ames in Norfolk re the fault under warranty, who came to my home, picked up the car, took it to their garage and returned the car to me fixed and valeted And washed.
It turns out some paper had blown up under the radiator area and was blocking the sensor every so often.
They did all this for no charge even though there was no fault with the car. Thought it was nice to give a good main dealer a plug for a change even though they are not my regular garage.
Wish we knew where this sensor is at it could solve others problems.
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Pandjh
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Re: Emergency braking system fault

Post by Pandjh » Fri Oct 11, 2019 7:26 am

Nice to hear Qashpad, the radar stuff is all behind the Nissan badge on the grill as i understand it.
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Qashpad
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Re: Emergency braking system fault

Post by Qashpad » Fri Oct 11, 2019 9:50 am

Pandjh thanks for that information. I have looked through the gaps in the engine compartment and can see wires going to the back of the Nissan badge as you say. Also there is still evidence of some masking tape on it so think this was left on during manufacturing. Cheers
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