Alex – I pushed a fix for the mirroring of RSDA elements in a Generic 
suspension template.  I also took this opportunity to refactor some the 
suspension test rig, including the output and optional plotting with GnuPlot 
(if the tested suspension includes RSDAs, there are some plots for those as 
well).

By the way, the JSON file you provided has some issues:

  *   A syntax error in the RSDA “Spring Curve Data”
  *   Missing key-value for "Antiroll Body" (as required for a suspension 
declared as “independent”)

and so, I’m not exactly sure how you even used this JSON file as is.



--Radu

From: [email protected] <[email protected]> On Behalf 
Of Alex Lan
Sent: Wednesday, December 13, 2023 7:33 AM
To: ProjectChrono <[email protected]>
Subject: Re: [chrono] RSDA seems not mirrored properly

Hi Dr. Radu,

This is my JSON for suspension test.

Regards,
Alex
在2023年12月9日星期六 UTC+8 16:55:47<Radu Serban> 写道:
Alex - Could you please provide the JSON file for the suspension subsystem?
Thanks,
Radu

From: [email protected] <[email protected]> On Behalf Of Alex 
Lan
Sent: Tuesday, December 5, 2023 9:08 AM
To: ProjectChrono <[email protected]>
Subject: [chrono] RSDA seems not mirrored properly

Hi, I performed a double wishbone suspension test with RSDA spring parallelled 
with the chassis, defined by Generic suspension template. The left and right 
wheel both moved upward as normal suspension test. However, the force of 
vertical actuator to motor the wheel are not equal, as attached. The forward 
and reverse stiffness are different in my RSDA. It means that the left wheel is 
compressing while the right wheel is stretching. My spring curve data is as 
follows:

 "Spring Curve Data":
      [
            [ -0.1, -1800],
            [ 0, 0 ],
            [ 0.1, 5400]
      ]

Also, the preload and rest angle of RSDA are not mirrored properly. This may be 
caused by the way to evalute the force of mirrored RSDA in 
GenericWheeledSuspension.
Best regards.
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