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R1 rover wheel friction model improved for stability of EKF2 while PX4 SITL is running. #1030

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YongraeKim
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When differential rover rotates,
lateral friction forces acting on wheels are exaggerate too high to diverge EKF2 on PX4.
This can be reduced by setting and to small values(i.e 0.01, 0.05).
Some params for wheel friction simulations are also changed.

Please refer to the issue below
SITL R1 Rover Mission Mode spin around itself #21353

@YongraeKim YongraeKim changed the title Wheel friction model improved for stability of EKF2 while PX4 SITL is running. R1 rover wheel friction model improved for stability of EKF2 while PX4 SITL is running. Feb 29, 2024
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@kalebbennaveed can you try this? Looks like it might be the fix we needed

@@ -570,7 +570,7 @@
<sdk_udp_port>14540</sdk_udp_port>
<hil_mode>false</hil_mode>
<hil_state_level>false</hil_state_level>
<enable_lockstep>true</enable_lockstep>
<enable_lockstep>false</enable_lockstep>
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Is there a reason to disable lockstep?

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@YongraeKim YongraeKim May 31, 2024

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Ah.. that may be my mistake. As I remember, that wouldn't do effect on the sim stability. But i'll check on it.

Oh, I remembered again and checked it,
and i found that error message occurs on simulator_mavlink
which say 'ERROR [simulator_mavlink] poll timeout 0, 22' if enable_lockstep set to true.

DonLakeFlyer and others added 2 commits May 31, 2024 14:18
* Add support for video capture and range zoom

* Use MAV_RESULT_DENIED for bad params
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4 participants