active control

[payamdindar]

hi
i have 2D-2story model with 2 different damping (C) for each story- [C1 & C2]
i assign C1 and C2 to each story with region command.(C=Zeta*2*m*w)
i decided write active algorithm for change damping during analysis between C1 and C2. (LQR or PID algorithm)
for example: when t=0.1s damping for story 1 is C1 and damping for story 2 is C2 and when t=0.5s damping for story 1 is C2 and damping for story 2 is C1. and this process repeat continuously for each time during the time history analysis.
opensees can do this active algorithm? or i force to use matlab for this purpose?
please help me
thank you

[fmk]

you should be able to change this by calling region repeatedly (hopefully you will not run out of memory .. if you do let me know and we can put a remove region or something)

[mohsenardiran]

fmk wrote:
> you should be able to change this by calling region repeatedly (hopefully
> you will not run out of memory .. if you do let me know and we can put a
> remove region or something)
Hello Dr FMK,
This is actually the one I was looking for. Could you please let us know if there is any simple model in your database to follow, or any documents to review? My area of interest is vibration control and need to use OpenSEES for nonlinear problems. We will highly appreciate any suggestion and advice from you.

Regards,
Azimi

[fmk]

no example exists .. as i said just put the region inside the analysis loop with different rayleigh values for each step .. as mentioned hopefully you will not run out of memory.