The cosolve solves the pull in as follows:

let's say it pulls in at 10 volts. when you sweep the voltage you need to
sweep it from lower than that at 5 volts to 15 volts.
it starts computing the deflection one by one at the pull in voltage the
solution diverges and this how the simulation detects the pull in. It
starts at 5 solution solution converges at 9 but not at 10 so it computes
at 9.5 and see if converges or not if converges it computed at 9.75 if
diverged then the pull in voltage is 9.5. This factor of half between the
incremented values can be changed in the pull in column of the trajectory.

if you dont understand exactly what I say see the tutorial of beam design
the section of pull-in voltage detection

On Thu, Sep 29, 2011 at 5:01 AM, tushar sharma wrote:

> Hello Friends,
>
> I am an undergraduate student working in the fields of MEMS design.I have
> been assigned COVENTOR as my simulation tool.Currently I am simulating a
> beam with holes in coventor (analyzer )part.During my analysis I am able to
> perform MemElectro,Memmech and Modal analysis.
>
> When I am trying to compute Pull in it shows failed computation and error
> reads as follows ;
>
> "Cosolve cannot run first trajectory step diverged.Reduce voltage or charge
> on conductors......
>
>
> Regards
> Tushar Sharma
> Chairperson
> IEEE MSIT Student Chapter
> Maharaja Surajmal Institute of Technology
> Delhi
> India
> 09278918875