Learning Forum

[paris56]

Hi!

I'm trying to model changes in capacitance resulting from rotations. Results disagree with experiment completely. Where an increase in capacitance is observed experimentally as a result of the motion, the simulations show a decrease and vice versa! Naturally, I have already checked the frame of reference and definitions of positive and negative rotation. Has anyone else experienced this?

Thanks in advance

 

[Sorceress Gia]

Are you stepping through the rotations by changing a model parameter variable? Have you checked that the model is parameterized correctly by manually editing the value in the 'Design Properties' window and confirming the geometry looks as it should?

[paris56]

Yes! I have even CT scanned the phantom and imported the stl file to the program just to ensure that the experimental and simulation geometry are exactly the same.

  

[Sorceress Gia]

How are you measuring capacitance? What frequency are you solving? Are you using HFSS or Maxwell?

[paris56]

       I use the Maxwell electrostatic and calculate a Martix of capacitance values (Im working with a DC system). The structure of the matrix is explained in the help documents so I refer to that to find the different capacitance elements.

 

 

[paris56]

Do you have any suggestions or potential solutions?

[KDELLE2]

how can i contact you ?