# Questions tagged [modeling]

Use this tag for questions about numerical or analytical modeling and simulation of engineered systems.

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### Sliding-mode control is a model-based technique?

The sliding mode control can be considered a model-based control? In my opinion yes since takes the information of the mathematical model of the system to be controlled handling with possible ...
24 views

### Workbench: Explain the difference between the case with bonded contact and the case with the frictional coefficient of 0.01

Explain the difference between the case 1 with bonded contact (top image) and the case 2 (bottom image) with the frictional coefficient of 0.01 For both cases, the top plate has displacement and the ...
27 views

### Solidworks - how to make a groove on a double curvature surface

Today, as I was making -for another post - the following part Although, I managed to use a couple of ways to do the above (revolve a sketch, and b) using swept cut) I wondered how would I make ...
38 views

### Unstable System. Error Trying to model the Red Bull Stratosphere Free Fall

I tried to model a problem months ago and still I can't solve, I don't want forget this problem so I would like to share what I tried and if you know what is happening with my graph. This is the ...
33 views

### Examples of model-based control techniques

I am trying to find out the differences between the model-based control approach and the data-driven one. Surely the main difference is the latter's independence from the information of the ...
37 views

### Nominal model and Mathematical model of a real plant [closed]

What is the difference between nominal model and mathematical model of a real plant? I am interested in understanding the difference since I want to understand why in some cases is not the best idea ...
25 views

### a model of a solid using trusses to approximate internal stresses?

my question is as follows: could the stresses on a solid body be aproximated with a discrete model based on trusses?, this is, that the result yielded by the analysis of the truss structure will ...
73 views

### Modelling of Ball and Beam System

I'm trying to model a basic ball and beam system using Euler-Lagrange Equation. My system looks something like this I have come up with this final Euler-Lagrange Equation: Where JB is the ball's ...
28 views

### Linear Nastran model not converging

I am running a SOL 101 linear statics FEA. If I fix down the whole geometry it converges. But anything less than around 90% fix down and it will sit there crunching away at the numbers forever. This ...