## newbie question: how do I get started...

Let say that I want two have two inputs nods that each should give a random variable and one node

that simply adds them together and plots the result. How could that be accomplished ?!

## Custum component for piecewise function...

Hi

I have a very simple problem. How to create custum component similrar to real expresion block (this block doesn't accept piecewise function) who generates piecewice function f:=x->piecewise(x<=2,0,x>=2 and x<=6,exp(-2x),x>=6,0) on output and nothing on input. When I modificate algebraic equtation template and input piecewise function there is an eror who doesn't accept the syntax for piecewise.

## tracing an error......

Dear forum,

i have a MapleSim model that works flawlessly, no errors occur and the plot results are as expected. When i try to use a template however(Analysis, Equations), the following message pops up:

(in PiecewiseTools:-is) Wrong kind of Parameters in piecewise.

What could cause this ? Unfortunately, my model is not for the public yet, so i cannot show you the sheet.

Hints ?

## cooling box...

Hi,

assume we have a cooling box that we open for a time period delta t. The box may be opened on top, so no cold air gets lost. What is the best way to model this in Maplesim ? So far, i have a heat capacity as box model for the cold air in it. I modeled a constant negative signal   during the time window delta t  and connected  a prescribed heat flow component to it.

Is this a reasonable model  in the easiest case ?

## Oscillator refuses to work...

Hi,

have a look at this circuit, a simple Opamp-oscillator.  I can't get it to work with Maplesim, can someone show me how to simulate this ?

Btw it would be helpful if we could upload .msim files to mapleprimes. I renamed it to .doc, if you want the source.

## Power Sensor...

Hi,

the implemented Power Sensor calculates the instantenious power, it just multiplies u(t) and i(t). What i need now is a device that gives me the average power, the sources all have periodic voltages/currents (most common case: sin shaped sources). I thought i could use the power sensor and integrate over a period, but i don't know how to  enter the upper time limit.

Thoughts ?

## PWM Custom Component...

Hi,

it shouldn't be hard to, do, but i cannot get this working. I just want to create a signal source that creates a pulse form signal with the pulse width parameter as a realsignal input. I used the custom component template and tried the DynamicSystems[Square] command, but the error messages that came up during this process didn't help me too much, because they seem to be unrelated (error in collect/series...). Do i have to create a new System first (DynamicSystems[NewSystem])?

## An “Animated” Conversation

This week I decided to do some research and find out the details of how to make model animations with MapleSim, by adding in CAD drawing files of the component parts. To see what I mean, take a look at this quick animated movie that shows a robot arm with five degrees of freedom:

## Picture import broken...

Hi,

maybe anyone knows a workaround for this: draw a rectangle in MapleSim, select the menu with the filling tool and browse for an image. The imported image (gif,jpeg, what you want) does not show up properly, it is stangely distorted. I really need this feature because i want to create some demo sheets to show how to do things in MapleSim.   I use MapleSim2 with latest updates.

Thanks

## How to get quickly the initial values of a MapleSi...

Hello

Does anybody hasa suggest how to quickly get the "initial conditons" of a (control) loop in MapleSim ?

When I'm debugging loops in MaplSim I'm missing a way to get the inital conditions and then to be able to see the (first) numerical values in each probe or on the "wires/ports".

Does something like this exit, or is it to be pushed on the "suggestion" list.

This applies also to PDE resolutions, the "get Initial Condition" run is a good trick to first check your model before running it.

## How do I make a custom signal generator block ?...

Hello

I want to mae a single output block custom for a signal generator , my function is a couple of pages of Maple calcuations, but easy to put inside a proc(time) ... end proc how to generate this. Your Real block does not allow me to type all y code. Making it from scratch from your embedded functions  with connections lines is possible, but a hell of a work, while its all there in Maple

Ivar

## How o change all axis time limits on all graphs in...

Hello

Is there a way to change globally all time horizontal axis limits in one go ? I have to define each time each of my 12 probe signals, parameter by parameter, axis by axis, even if I'm using the same values.

Im missing in the right "parameter plot" window a way to define globally the time interval for all plots, and not necesarily the time interval of the full simulations, in particular to leave the system stabilise and get rid of the initial peaks and oscillations.

## Matrixes using the row reduction...

How do I complete the following by using row reduction rules.

3x            -z=-1

4x     -y    -2z =-5

2x +  7y  + 9z = 0

I installed Maple 13 and Maplesim 2.0 in a brand new computer I ran the robot simulation successfully but as soon as I ran windows updates and the rest of applications it not longer  work. it just gives me a blank windows with the tool bars.

Does anyone encounter this problem? How do you solved it.

I updated my video card with the latest drivers; and follow the instructions in  regards to installing the latest Java

## A question on index reduction of equations in Mapl...

Hi there,

I am basically using MapleSim to obtain the equations of motion for mechanical systems and copy

pasting them into a separate Maple document and solvng them numerically. I could work with simple pendulum

and a two link manipulator. But in the case of a four bar mechansism since the system is a closed chain the

number of unknowns ended up being more than the number of equations. In this case, the joint reaction forces

came into play as unknowns. I know MapleSim intelligently does index reduction and solves these equations. But

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