[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Paparazzi-devel] Magnetometer issue.

From: Luiz Flavio Felizardo
Subject: Re: [Paparazzi-devel] Magnetometer issue.
Date: Thu, 29 Sep 2011 13:42:21 -0300

Hey Chris and Heinrich,  first of all thanks for your colaboration... I really appreciate every help u guys give me...

About the Issues Chris mention I have some more info to give.

1) we are using this
<subsystem name="ahrs" type="dcm">
<define name="USE_MAGNETOMETER" />
with lat and log about this (lat0="-22.413523" lon0="-45.433676")

2) Don't think the baund rate is the problem. It is set to 57600.

Well, if you have any suggestion please dont hesitate in contact me.
Cheers, Luiz Felizardo.

2011/9/29 Prof. Dr.-Ing. Heinrich Warmers <address@hidden>
Dear Christophe,
i think the magnet sensor interface in the DCM Implementation  is wrong.
The attitude and the three magnet fled components  must be considerd when calculating the yar  angle.
I have a free and correct GPL  implementation  also for correcting hard magnet materials near the sensor.
I can mail it to you if you want.



Christophe De Wagter schrieb:
Dear Luiz,

At this moment there are still 3 known issues with lisa+fixedwing+magnetometer combination.

1) The magnetometer code for fixedwing with <subsystem name="ahrs" type="float_dcm" /> is not good yet and the attitude filter becomes easily unstable at higher lattitudes.
2) IMU data might not fit lower modem rates (9600bps) and then messages are dropped which can cause for instance the GCS not to populate while messages do arrive (when ALIVE message fails to find some free bandwidth).
3) Last but not least: the current I2C implementation does not work with all sensor combinations (could e.g. happen when adding magnetometer). It can happen that IMU stops working after a while. A totally new lowlevel driver is in the make to be released as soon as possible but it is a lot of work.


On Thu, Sep 29, 2011 at 2:27 AM, Luiz Flavio Felizardo <address@hidden> wrote:
there is something wierd with my setup and I cant figure it out, anybody would mind to help? :D
 It's something with my magnetometer, I had to comment this line (<define name="USE_MAGNETOMETER" />) cause with the magnetometor up (this line uncommented) the system go crazy and even stop working. I checked the Ivyprobe and the messages log it seems that the system is overloaded with magnetometer information and dont have enough spare link to send or do the other functions. Is there any way to limit the amount of messages the magnetometer sends!? Or, if u dont think thats the problem do you have any ideas?

Lisa/L with IMU Aspirin system. Fixedwing Airframe.

Thanks very much.

Paparazzi-devel mailing list

_______________________________________________ Paparazzi-devel mailing list address@hidden

Paparazzi-devel mailing list

reply via email to

[Prev in Thread] Current Thread [Next in Thread]