Expanded ground vehicle shimmy

[Zosma Procyon]

I'm trying to develop an expansion for a mobile base I have on Duna, but every time I dock a test article to a mobile base identical to the one on Duna the expansion starts to shimmy back and forth until it either spins the whole thing around in slow circles or bursts the primary base's tires. Past experience tells me this can come from either overuse of autostructing or not having the wheels set up with the same spring and damper strength, but I've eliminated both of those causes. The test article's wheels are set up exactly the same as the test base, and the test article only has 2 autostructed parts on it. Does anyone know a trick to find out what is causing the problem?

[90VG]

Avoid time warp while in range.  Turn off SAS on both vehicles.

[mikey117]

It may be reaction wheels fighting against each other. Try turning torque off on one / the other vessels/ base part.

I had this with one of my payloads while building a station. Everything was fine until I sent the rcs tug across to grab payload.  As soon as they docked both parts (tug and payload) began oscillating  against one another.

Everything settled down once I disabled torque on the payload delivery  stage.

Hope this helps.

[Zosma Procyon]

9 hours ago, mikey117 said:

It may be reaction wheels fighting against each other. Try turning torque off on one / the other vessels/ base part.

I had this with one of my payloads while building a station. Everything was fine until I sent the rcs tug across to grab payload.  As soon as they docked both parts (tug and payload) began oscillating  against one another.

Everything settled down once I disabled torque on the payload delivery  stage.

Hope this helps.

 

18 hours ago, 90VG said:

Avoid time warp while in range.  Turn off SAS on both vehicles.

Neither vehicle had SAS turned on. I canceled the contract.