MapleSim Questions and Posts

These are Posts and Questions associated with the product, MapleSim

Hello,

I have a little question concerning the definition of the rotation matrix in the rigid body frame.

The rotation matrix is defined like that in the help menu : "The rotation matrix that transforms a vector expressed in the outboard frame to the inboard frame".

Consequently, we have :

Hello,

In multibodies system, there exists many kind of coordinates namely joint (or relative) coordinates and absolute coordinates. Moreover, for the joint (or relative) coordinates, it is possible to choose strict, simplified, or complete coordinates.

For the moment, i only find in the tutorials system modeled with complete joint (or relative) coordinates. I will give the example of a 4 bars mechanism. The kinematic scheme with this complete joint coordinates is the following :

MapleSim already developed a Template for Linearization.

The code behind "Linearize" button in the Linearization template is as follows:

"MapleSim:-Templates:-Linearization:-Linearize();"

The results, namely A,B,C,D matrices in the state-space presentation, are shown in the text area "mcEqs".

How can I save these matrices to some variables for further analysis?

In addition, without the linearization template, 

Hello, everyone, I have written 13 equations, and some of them contain 88 items at least, so they are complicated. When I have executed the program and estalished input and output ports, I click the button "Generate MapleSim Component", it takes a while for running, but there is no MapleSim Component generated in the GUI interface, strangely, no error information appears at the same time, I cann't figure out what's wrong with it? Could someone help me out? Thank you. This mw file is attached.

Hi,

I need to model the MapleSim ground as a hard ground. For example when the robot swing leg hits the ground, it should not have negative vertical position. Basically, the robot will move on a surface.

Thanks...

Hello all,

 

I created an active high pass filter and tried to obtain bode plot from "Linear System Analysis."

I could do that but now I want a transfer function of the active hight pass filter.

 

So as in title, I want to know how to get transfer function of the system from "Linear System Analysis."

 

Any helps would be appriciated.

Yukihiro

In MapleSim, it is possible to constrain a rigid body in a multibody system to an arbitrary constraint? 

Similarly to how a mass at the end of a simple pendulum can only move along a circle defined by the length of the pendulum, I was hoping to constrain one to a shape like an ellipse or sine wave.  I could then give it initial velocities and see how it would move along the shape over time.

I'd like to be able to define this constraint with an equation. ...

I have been trying to figure out how to use the flexible beam properly. I'm looking for a clear example on how to actually use this component. I have had no luck so far. I must be be missing something. 

 

The current example, http://www.mapleprimes.com/questions/94996-Flexible-Robot-Arm, does not really show much. 

 

Does someone have a simple example? Perhaps using the Flexible Beam as a cantilever, with one end fixed...

Hello,

I've been working on interacting with the MapleSim optimized C code (first post was here: http://www.mapleprimes.com/questions/145427-MapleSim-Connector-C-Code-Api?sq=145427) and two manuals were recommend to me to read, which were very useful. I ended up writing up an alternate implementation of the main method described in the one manual (http://www.mapleprimes...

Hi,

I've been trying to manipulate the equations of a mechanism that I've exported from MapleSIM.  The system equations contain 4 differential ordinary equations, and 6 algebraic equations.  In MapleSIM it simulates fine, but I'm having problems simulating it in maple alone (without multibody exports).

I've tried solving the initial value problem by replacing all the time dependant variables with constants, (and as this is a dynamics problem) I supplied...

Hello!!

 

I have modeled a 3DOF manipulator with crank-arm type actuators in maplesim!!!

It simulates the model... but when I "Create Attachement>Equations" and when I click on "load selected subsystem"... it starts evaluating but never gives me equation... I have waited for almost 2 hours but no luck!!!!

Any idea what should I do to get equations for this model??? 

 

P.s. I have attached the moel!!!

Hi,

A right click on the visualization CAD geometry icon, attaching an STL file, activates a pop up list of options. One of the options is "make rigidbody". The units are for the MKS system. I must be doing...

Is it possible for someone to provide the roller coaster maplesim model?

Hi,

I am trying to perform a simple model of the entrainment of air in a jet by aplying energy emand momentum balances to the injector and flute. But i am having doubts on how to prescribe pressure on a point. This is the equations of the component Injector:

In the component porti...

Hi,

I'm running a 2D parameter sweep from Maple 15 on a MapleSim 5 model. The output is stored in a 2D matrix.  I've encountered two problems:

1) when I graph it with matrixplot the z-axis values are fine but I can't figure out how to change the x-axis and y-axis values from the matrix indices to the actual values of the swept parameters. 

2) When the parameter sweep begins I get a warning about storing the values in a matrix.  Maple...

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