"HI Michael,
I don't think I can help you with the moving map efis idea, although it sounds very interesting. I expect you'd have to add some form of GPS to the system to determine your location. I don't know anything about Visual…"
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michael graham left a comment for Alec Myers"Thank you for your interesting article on the design of an Attitude Heading Reference System. The hardware I can understand the programming is going to take quite a bit of work. I know as I go along I will have some questions for you.…"
Alec Myers replied to William Premerlani's discussion robust estimator of the direction cosine matrix"Doug, et. al.
I've written up the project (so far) here:
http://myahrs.wordpress.com/?order=asc"
Alec Myers commented on William Premerlani's blog post Magnetometer alignment"Sorry - one rotation for each angle theta and 2pi-theta and two possible rotations for every angle in between."
Alec Myers commented on William Premerlani's blog post Magnetometer alignment"Bill,
I think your equation 11 is an insufficient constraint on A to define it.
For vectors a, b of equal length that subtend theta there is a rotation from a to b for every angle {theta, 2pi-theta}. You're assuming the shortest rotation…"
Alec Myers replied to William Premerlani's discussion robust estimator of the direction cosine matrix"Doug,
I don't know if you've looked into the maths but you either need to stabilize the magnetic information so you can use the whole magnetic vector (magnetic heading + angle of dip) as a reference vector during a turn, and/or…"
Alec Myers replied to William Premerlani's discussion robust estimator of the direction cosine matrix"HI,
I'm using the DCM code as provided with the CK devices "mongoose" as the basis for an AHRS for real aircraft. (That means some of the difficulties of UAVs don't occur: no continuous high-speed rotations for a Cessna 182, or…"
Profile Information
- About Me:
- Flying around the Toronto area
- Tell us a bit about your UAV interest
- Actually interested in avionics for real aircraft
- Hometown:
- Toronto
Comment Wall (1 comment)
- At 2:29pm on May 19, 2012, michael graham said…
Thank you for your interesting article on the design of an Attitude Heading Reference System. The hardware I can understand the programming is going to take quite a bit of work. I know as I go along I will have some questions for you. One thing that I am very interested in is the incorporation of a moving map. Is the software used in the moving maps on some EFIS systems adaptable to the firmware written in Visual Basic 2010 Express and also the ino 0.3.3 in the arduino hardware. The mongoose 9DoF with Barometric pressure sensor has bootloader. Does it also have some of the firmware such as the Mongoose 9DoF v1.1 Visualizer and also Mongoose 9DoF Base AHRS 11 zip?
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