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I recently stumbled upon a hypnotic video of 15 out-of-phase pendulums from a physics experiment at Harvard University.

The...

Hello,

I am trying to solve a transient heat transfer problem.

The problem is that I have an insulated pipe that is immersed in cold water.  At time 0, the fluid filling the pipe is at a constant temperature.  The insulation at one end of the pipe is different to the rest of the insulation.  I need to find out the time that it would take any fluid to reach a certain temperature, called the cool down time.

A graphic representation of the...

How do I import/export excel into Maplesim? Also how do I view mpld data files? I tried viewing mpld files using maplesim and maple 14 but it didn't work.

I'm putting together what will eventually be a rather large simulation system that I want to be able to maintain across a reasonably large organization. Do you have any recommendations for Source Code Control/Versioning systems that work with your .msim file format or should I resign our team to exporting/importing code back and forth into Modelica for source control?

 

Thanks.

Hello!

I've got a question about model integration process.

I've tried to solve quite complex mechanical model and this messages have appeared.

 

Computing initial conditions...
Iterate re-initialization...
done.
Simulating...
CreateDataRecord: using dsolve method=rosenbrock_dae
Generating configuration 1
Integrating configuration...
Re-initializing after event at t=4.94271387307997e-009...

Hi all,

I am interested to find documentation from internet in using Maplesim for power electronics simulations. Like Gradators and frequency variators etc...

I can not find any documentations.

Could you if exist any web site for modeling in power electronics and perhaps with Maplesim

Thanks in advance for any help

Kamel

Hi everyone.. Now, i learn Maplesim.. I want measures force between 2 frame(a and b). which are connected by prismatic joint.

But a force and moment sensor acts as a weld joint.. so althought i measured force but frame b can't move.

who can solve my problem??

thank very much!!!

PS: i want measure force 2 frame to calculate the friction between them.

   The recent flow of spam into MaplePrimes gave an opportunity to recall some pages fallen out of our memory: interesting questions, deep answers, and rich in content posts. It suggested me the following idea which I would like to discuss with the  MP members. Maybe, it would be reasonable to create a new heading "The best of MaplePrimes" in MaplePrimes. For example, every month experts choose a few candidates to be included in "The best of MP". Then the...

Hello!

I'm trying to solve numerically an ODE system with piecewise. And this piecewise is very important for this task.

This system describes behavior of a pulley with friction. There are some constants: m, c, g, mu and J. Values of this constants are not important.

> sys := m*a(t) = piecewise(a(t) < a0, F0*time, a(t) >= a0, 0), v(t) = diff(x(t), t), a(t) = diff(v(t), t);
> m := 5; F0 := 10; a0 := 5;
> initialconditions := x(0) = 0, v(0) = 0;

Hello!

When i start the simulation of my model, which is a rotor-stator interaction, i get an error message where the rotor first touches the stator: "Simulation problem: maximum number of event iterations reached (100) at t= ....". I made a custom component to handle the contact event (change of the derivatives), but i don't know where i can change the maximum iteration to a higher number.

Thank you.

Hello,

I want to generate a source component,namely,acceleration function,y(t)=(1/2)*t^2,where y(t) is output of the component. Is there any way to generate it?

By the way,I find a component,named 'Real Expression',which located in Signal Blocks\Sources\Real. I thought it may solve my problem,but after reading the help document,I felt the description was too simple to understand. Can you give me an example of how it can be used?

Thank you!

Hi all,

I need to define a state machine in MapleSim. A Maple procedure would help to solve this issue. How do I include a Maple procedure in my MapleSim model?

I am looking forward to your answers.

Fabian

cart.msim

Hello,

I use maplesim to construct a cart, which is controlled by a DC magnet. As the model in the document illustrated, the cart is drived by a prismatic, and there is a rigid body frame between the cart and the prismatic. This rigid body frame is used to sustain the cart....

Hi all,

I'm working on systems with discontinuities and need to define a finite state machine.

I tried to define one by myself and encountered some errors. The computation of initial conditions complains about either cycles and suggests using a pre-block - I am allready using one - or about inconsistent initial conditions and ignores some constraints. Does the initial condition computing algorithm loop insufficiently?

I also tried to use the modelica...

two_pendulums.msim

 

Hello,

I use maplesim to simulate two simple pendulum, as the figure illustrated. The model works well. I want to let the names "pendulum A" and "pendulum B" appear in the 3D graphical view, so the audience will distinguish them...

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