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Fix minor error in amcl.launch #39

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fjp merged 1 commit into ros-mobile-robots:noetic-devel from rsilverioo:patch-1
Sep 22, 2021

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@rsilverioo rsilverioo commented Sep 22, 2021
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The "kld_err" is initialized twice, and with the wrong values.
I guess you wanted to initialize the "kld_err" parameter to 0.01 and "kld_z" to 0.99.

The "kld_err" is initialized twice, and with the wrong values. I guess you wanted to initialize the "kld_error" parameter to 0.01 and "kld_z" to 0.99.
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In fact I don't even know how you performed the localization with amcl correctly using that configuration (kld_err=kld_z=0.99).
You had to have very good and precise odometry 😅

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Thanks for spotting this!

@fjp fjp merged commit 11ac235 into ros-mobile-robots:noetic-devel Sep 22, 2021
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fjp commented Sep 22, 2021
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In fact I don't even know how you performed the localization with amcl correctly using that configuration (kld_err=kld_z=0.99).
You had to have very good and precise odometry sweat_smile

I think the min_particles=500 "helped" to hide this issue, which is M_X_min in the KLD sampling MCL algorithm:

image

The odometry sensors I use (encoders in the DG01D-E motors) are definitely not precise ;-)

I hope to find more time soon to improve odometry and work on #37

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