## 15 Reputation

12 years, 77 days

## Model preparing and integration process ...

Hello!

Could you pleasу tell me, is it possible to make MapleSim not to simplify equation set of my model and solve equations without simplification? I want to do this because simplification process (reduction of equations number) takes too much time in comparison with integration process.

Thank you!

## Model integration...

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...

## Solving ODE system...

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;

## Movable pulley dynamics...

Hello, MaplePrimes!

I want to create a custom component to model dynamics of a movable pulley, which can rotate and move along some direction (translational motion). I’ve got dynamic system, which describes both motions of a pulley. Some information about this dynamic system: