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Re: [Paparazzi-devel] Altitude estimation

Subject: Re: [Paparazzi-devel] Altitude estimation
Date: Tue, 30 Sep 2014 06:03:54 -0700 (PDT)

Yes, it will be the same. GPS locked will not filter this problem out. You can see raw sensor also has a few fault during the time, but how estimator.Z can be in way? Someone can give me a guide to goes into the code ? I suppose the without GPS and moving, estimator.Z should only map to baro output, how this peaks come from....

I have two transition robotics lisa/M boards. Both Have same problem. And I have two Lisa/M boards from China, don't have this problem. But the one from China has less precision of the Baro sensor, for that the altitude precision rang is around 1 meter, and this transition robotic one can be precision in less than 0.3 meter, but with error.  What a pitty.

By the way, someone know how to contact transition robotics? I send them email, there is no response.

Mailbox 发送

On Tue, Sep 30, 2014 at 2:24 AM, Balazs GATI <address@hidden> wrote:

No idea except the missing GPS signal. Do you experience it by fixed GPS
signal, too?


2014.09.30. 8:26 keltezéssel, afishindouban írta:
> Here talking about BARO and altitude estimation. I want to share with my
> issue. This issue has been bother me for a long time.
> <target name="ap" board="lisa_m_2.0">
> <configure name="LISA_M_BARO" value="BARO_MS5611_SPI"/>
> <configure name="PERIODIC_FREQUENCY" value="120"/>
> <configure name="AHRS_PROPAGATE_FREQUENCY" value="100"/>
> <configure name="AHRS_CORRECT_FREQUENCY" value="100"/>
> <define name="DEBUG"/>
> </target>
> try this is in V5.2, Microjet_lisa_m configuration. I only add a DEBUG flag.
> This is a LISA/M2 with AspirinV2.2 from transition Robot.
> you can see this strange real time plot result.
> <>
> as you can see, BARO_MS5611 pressure and temp look normal (pressure has one
> abnormal peak). but estimator.Z has many strange peak , that bother me a
> lot. what could be the reason of it ? the AP board is one the table without
> moving, no light to the sensor side. I only connect Xbee to the board and
> power up. no any other thing....
> --
> View this message in context:
> Sent from the paparazzi-devel mailing list archive at
> _______________________________________________
> Paparazzi-devel mailing list
> address@hidden

Balazs GATI, PhD
associate professor
Department of Aeronautics, Naval Architecture and Railway Vehicles
Budapest University of Technology and Economics

Address: Budapest
Stoczek u 6. J. ép. 423
Tel: +(36)-1-463-1960
Fax: +(36)-1-463-3080

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