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yugang

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  1. Hello, Suggest there are 2 mass, they locate in one line. But mass_1 at S=0m, while mass_2 at 5m. Now, I apply F=10N force at mass_1, mass_1 starts to move, at 5m, it will meet mass_2. Then this 2 mass should have collide. The speed curve should have a drop. I don't know how to simulate this, whether it is possible in activate with Modelica components. This model is simple, but it is the simplification of our project. If it works, it means the complicated model in our project should also work. Thanks. Have a nice weekend.
  2. Thanks for the answers from RoKet and Livio Mariano. I think I make mistake between math expression and matrix expression. The if and switch works well in matrix expression not math. Thanks for your answer, I think RoKet's solution is normal one. And the one from Livio Mariano is very tricky and interesting. Have a nice day.
  3. Hello, I try to creat a math expression block, with cases function. I follow excately the example in extend defintion document. But I don't understand why it not works. For example, there is a sin waveform generator. Output 1 when signal >0, output -1 when signal <0. Can anyone takes a look and help. Thanks. Case.scm
  4. I spend more time to optimize my model. To make sure no solver error while simulation. In this way, now it works quite well.
  5. During simulation of multi-physics, encounter this error. Can anyone helps me how to solve this, thanks.
  6. Hello, Thanks for your reply. Yes, I have read your post, and follow excatlly the same way as shown in the topics. I will add try catch loop into my master script. If any progress, or interesting finding, I will add here. Have a nice day.
  7. Hello, How to ignore the solver error during batching solving ? When we use activate during batching solving, if there is solver error, the simulation will be stopped. It is a pity. How can turn off this error warning, and ignore this error, continue to solve in next step, not stop here? Because if we have 5000 batch solving steps. one error in it, it is OK, during our result analyze, we can remove this point. But in simulation, if it stops here, it take our time to watch the solving and not automatically.
  8. Hello, These days, I work with Flux coupled with Activate for simulation of contactor dynamic behavior. The contactor has 2 coils, 3 switches. The 3 switch is controlled by activate. While the current of the 2 coils are used as sensor input for Activate. But when I start the simulation, at beginning the current in the coil seems reasonable. But after 5ms, or like this, the current and voltage on the coil starts to become very strange, and non-meaning, just noisy points, I don’t under stand why. I think, the activate only control the switch and do some control, very simple, the Flux finish FEM calculation. When I work with Flux alone, same calculation performed, no noisy points. For solver I use same as tutorial showed for activate and Flux coupling simulation. I hope I can get some help for this topic. Thanks. Activate_couple_Flux_simulation.docx
  9. Hello, These days, I work with Flux coupled with Activate for simulation of contactor dynamic behavior. The contactor has 2 coils, 3 switches. The 3 switch is controlled by activate. While the current of the 2 coils are used as sensor input for Activate. But when I start the simulation, at beginning the current in the coil seems reasonable. But after 5ms, or like this, the current and voltage on the coil starts to become very strange, and non-meaning, just noisy points, I don’t under stand why. I think, the activate only control the switch and do some control, very simple, the Flux finish FEM calculation. When I work with Flux alone, same calculation performed, no noisy points. For solver I use Forward Euler same as tutorial showed for activate and Flux coupling simulation. The attached document has some picture to make my issue more clear. I hope I can get some help for this topic. Thanks. Activate_couple_Flux_simulation.docx
  10. Yes, I have the same issue of this. And I click on the SDK option. then I solve this issue. Hope it can help you. I install 2019, you need make some choice when you starts to install.
  11. Hello, this is my file, thanks for the help. 20181026_YG_0000.out 20181026_YG_0000.rad actuator.hm
  12. Hello, I am new user of hyper mesh. I encounter a error when I ran radioss. The error id is 760 It says I add solid property to shell elements. But in my model, there is no shell elements. Is it due to my mesh method ? I mesh the surface first and then use solid map mesh. The orginal file is attached as below. Please review it. Thanks. 20181026_YG_0000.rad actuator.hm 20181026_YG_0000.out
  13. Thanks for your information I have checked the version of my software, it is 2017.3. I have downloaded 2019, but the license is not ready in China. I have called the sales in China, they advised us to wait. Thanks, I have downloaded the pdf, I will read it.
  14. Hello, Thanks for your reply. I have downloaded your model, and run on my computer. Some errors. I don't know why. I am new users of activate. I think your solution should be the right one this topic. It is kind if you can show me where I can get this information on how to make the custom block. I click on the help, it is not enough. Or you can give me the name of the documents, I can download from Altair connect by myself. Thank you very much.
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