'Reaction type' while using Xsens Data

Main Forum
1

Hi,

I am conducting one study where in I would want to know the muscle activities while bending/lifting . I have analyzed muscle activities in two conditions:

  1. input form xsens data
  2. Manually creating drivers across sacrum and hip joint
    What I observed is muscle activities are different in the two states, which I presume, could be due to the reaction type 'on' while using xsens motion data.
    Please suggest whether the assumption is correct and if yes how to switch off reaction type while using Xsens data.

Thanks & Regards
Sakshi

2

Hi Sakshi,

By default, reaction type is set to Off for drivers in the Xsens model. You can confirm that in your model over here: Main.Studies.InverseDynamicStudy.ModelEnvironmentConnection.JointsAndDrivers.JntDriverRightLegTD.Reaction.Type

It's likely that you have accidentally switched on these reactions somehow in your model. Please switch them off. You would need these driver reactions to be off for the muscles to carry the load.

Best regards,
Dave