Hello,
I'm trying to restart a simulation with a servo wall/mesh, unfortunately the servo wall behaves after the restart like a fixed wall. Also a fix_modify integrate start doesn't activate the controller.
According to the documentation a restart should be possible "Furthermore, this fix writes the state of the servo wall to binary restart files so that a simulation can continue correctly".
I tried already to redefine the servo settings after the restart without success. I'm also confused that com needs to be defined after restart - as the servo valve moves during the initial simulation I can't predict it's correct position at restart.
Attached you can find the input script of a test simulation and a diagram which shows the force and position of the servo wall. It should be mentioned that the ground is wiggling in the time interval 0.5-1.3 and 1.8-2.5 s in order to check if the servo wall reacts on the changing contact forces.
Thanks for your support,
Christoph
Edit: I missed to upload the mesh files
ckloss | Sun, 04/23/2017 - 12:19
Hi Christoph,
Hi Christoph,
restart and servo walls should work. com has to be defined, but is over-written with the value from the restart file.
Do you use a run command before the servo wall in the simulation doing the restart?
Best wishes
Christoph
Christoph | Mon, 04/24/2017 - 09:48
Restart mesh/surface/stress/servo
Hi Christoph,
thanks for you reply.
What do you mean with a run command before the servo wall is doing the restart?
If I run the simulation after the restart (e.g. for one step) before I redefine the mesh I get an error "Mesh (id xxxx): All mesh elements have been lost / left the domain"
In any other combination I have tried so for I either get an error or the servo isn't working/moving.
Shouldn't it work in this way: Redefine the servo with a fix mesh/surface/stress/servo command (defining the mesh file, type, com, ctrlPV, vel_max)
As the servo doesn't work I tried also a fix_modify servo/integrate start command in the next line - without success.
Did I miss something to restart the servo correctly?
Thanks,
Christoph
Zheng Hu | Fri, 10/13/2017 - 05:03
How do you solve this problem
Hi, Christoph,
I met the similar problem as yours, thus I want to ask have your problem solved? Could you please give me some clues? We can also communicate by email: Zheng.Hu@Colorado.EDU. Many thanks!
Zheng
Jack | Fri, 10/19/2018 - 20:53
Have you solve your problem
Hi Zheng,
I have met the similar problems like yours, have you solve the problems now? We can also communicate by email: Yuxuan.Wen@Colorado.EDU. Many thanks!
Yuxuan
Zheng Hu | Mon, 10/22/2018 - 12:26
Yes
Hi Jack,
I think I have solved this problem. Let's talk about this using E-mail.
Zheng
furkhat | Tue, 01/29/2019 - 09:41
I met the similar problems
I met the similar problems likes you, have you solve the problems now? We can also communicate by email: furkhat.khamitov@nu.edu.kz
Thanks a lot!