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ThomasScherrer

autonomous rc flying sensors

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ok this one is going to be difficult.

I want some sensors that can tell the onboard computer all there is to know

about the plane angles and directions in real time.

a GPS is fine for the position and raw flying direction, if all is fine,

but if plane is blown upside down, or sideways the GPS can not indicate it.

Gyro's and accelerometers can be used together with electronic compass

and then I can calculate it all, but is there an easy way.

oh by the way: no light sensitive devices ! all navigations must be able to work

inside clouds and day and night !

I know wing gyros, and optical aritificial horizon.

anyone of you playing arround with real autonomous rc plane flying ?

totally computer controled, with or without take off and landing done by humans

Edited by ThomasScherrer

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Hi Thomas,

Then you need a FMA Autopilot :D

Its uses 4 infrared thermopile sensors, and can see the horizon - also in clouds.

Will keep the plane stable, even if its downside.

Same technology have been used in Space shuttles..

There is also something the same with another name i cannot remeber.

(Will find a link)

Edit:

Oh, you did say it cannot be optical, well this is i guess,

but have readed that it will work in clouds + at night time.

(But only if earth/sky temperature is different)

PS.

De MAX232 SMD print du havde ser gode ud, du får lige en PM :-)

LoopForEver

Edited by LoopForEver

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Full IMU needed as you said... 3 gyros, 3 accelerometers and 3 magnetometers. If you really want something solid I don't think there are many other ways.

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Yes eaxctly Kilrah, nothing can be spared on this project, we have a sponsor,

and my company can pay for some of it also.

but please keep the ideas, info, links comming up

so we can keep it all together in this thread,

many others could be interested in funny things like this.

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Yep 3+3+3=Full house, will work for sure if you can write the software, BIG task !

Terry

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Indeed. There's a reason for even small commercial IMUs to cost more than $1000 when there's for less than $100 in components....

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I think the Eagletree setup 'guesses' the artificial horizon from the control inputs; no accelerometers onboard.

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Indeed. It takes something like the GPS heading change rate to display roll and vertical speed for tilt...

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so conclusion is:

the eagletree thing can not be used to control and navigate at plane fully autonomius , in a cloud or night or both.

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Thomas, perhaps you may already know about micropilot systems,...have a look at the link below,....., if you got the sponsors and the money...then go for it !

http://www.micropilot.com

Gil

Edited by Gil

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Hi,

the Eagle Tree Logger (I've one in use) has no sensors for the plane level as the FMA Co-Pilot, only for current, voltage, rpm, height and so on. And it's not able to control anything in the plane, it stores only data on board and/or send it to the ground station.

Greets, Erwin

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Thomas, perhaps you may already know about micropilot systems,...have a look at the link below,....., if you got the sponsors and the money...then go for it !

http://www.micropilot.com

Gil

I've had someone reporting me about being very unhappy with that one. He apparently had some problem where the autopilot went crazy and crashed a plane without him being able to do anything but watching. Having spent like $4500 on the autopilot only I can understant the point...

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:rolleyes: Very strange,...these systems are used by the military and civilian organizations all over the world with great success,...., did he discovered what went wrong with the plane ? :o

Gil

Edited by Gil

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those micropilot where and how can I purchase ?

no info about price and such on their web ?

or is it all just for looking at it ?

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Thats not the first time I have heard of problems with MicroPilot, but then again you only tend to hear about the bad points. I think I have heard of problems with most systems on the market at some point.

Terry

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those micropilot where and how can I purchase ?

no info about price and such on their web ?

or is it all just for looking at it ?

That's the sort of professional stuff that is too expensive to dare displaying prices in the open, you know the usual "Please call for more info and we can discuss" ;)

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The problem is,..., i don´t know if they sale to anyone,...i´m quite sure of that.....unless you prove that you are a registered member of any respectable organization or even a comercial representative you´ll not get any of their products,....at least this was the feeling i had when i contacted them 2 years ago . :rolleyes:

Gil

Edited by Gil

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Normal. It's that it can have potential military applications, and just like thermal imagery devices the US have very strict policies about that sort of stuff.

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