MaplePrimes - MapleSim Posts and Questions

Blank Equation Extraction of Op Amps in MapleSim

Onnimikki — Fri, 11 May 2012 09:56:10 Z

I am trying to extract the underlying equation for a simple operational amplifier circuit in MapleSim 5. The same process that I had used earlier for a simple resistor circuit (without opamp) worked fine and yielded equations. However, when I try to do the same thing with an opamp (configured to do a simple amplification of an input voltage) I get a blank "View Core Equations" box in the Equation Extraction attachment.

Thanks!

How do I create a custom component for a specific input signal?

Jocelyn Cao — Tue, 08 May 2012 14:14:11 Z

The input signal is given above. I don't kown how to get ti in MapleSim whether use custom component or not. Is there anybody can do me a favor. Thank you very much.

Switching between Active and Passive Joints in MapleSim

juststorms — Tue, 08 May 2012 00:55:02 Z

Does anyone know how to switch a joint between having a prescribed motion driver and acting as a passive joint? More specifically, I am building a bed of spring to serve as a model for haptic feedback on a Phantom Omni device. Therefore, I need to read the position of the device (which is not a problem) and then based on the position of the device calculate a force to feed back to the device.

Consider the simplified example below. In one situation I may need to give...

Simulation end time tf in Maplesim

Alger — Thu, 26 Apr 2012 17:19:35 Z

Hi,

I have tf=0.04s but the probe plot only 0.02s at one simulation, 0.03s for another simulation ! How to oblige the probe to plot from 0s to 0.04s ?

Thanks

multi spring model in maplesim

Christopher2222 — Wed, 25 Apr 2012 02:25:42 Z

How would one set up a multispring model in maplesim?

Actually I don't know the exact model I want to try to explore yet, but I was wondering if someone could show an example of, let's say a beam with 4 springs attached offset to one end. On one end of the beam we inject vibrational frequencies and graph the output on the other end - doesn't matter which end - I imagine we could explore both from both ends. How could we set that up?

Here is my example picture.

Can I connect a Spring and a Revolute joint directly?

moazzam — Mon, 23 Apr 2012 14:44:43 Z

Hi,

Well, I'm trying to connect a translational spring to a revolute joint. But, I'm unable to do so. I'm new to MapleSim and I ain't a mechanical engineer either. I need you to help me a little. Anticipating a quick response!

Why does MapleSim random data custom component with zero mean cause simulation problem?

onder — Fri, 20 Apr 2012 21:50:04 Z

Hi,

I have a simulation file consisting of a number of modelica custom componets and maple custom components. I initially generated Random Data with mean 1 and standard deviation 0.5. Constructed all the blocks and combined with a multibody system, it worked fine. However, when I generated Random data with zero mean, then I have this error/problem "Simulation Problem: maximum number of event iterations reached (100) at 1.85000".

I used a couple of pre() function with clock=sample(0,0.01...

I have a small question about the software

Nhan95 — Thu, 19 Apr 2012 10:03:26 Z

What is the maplet in maple ? What does it help me?

What is the maple sim ? where I can download it ?

What do these parameters of Clutch mean,phi_nominal,w_small,k_locked?

diff8911 — Tue, 17 Apr 2012 02:45:35 Z

What do these parameters of Clutch mean,phi_nominal,w_small,k_locked?

And, how can I use them?

Anyone can tell me the detail?

Thank you.

Greater or equal

Alger — Mon, 16 Apr 2012 18:59:25 Z

Hi all,

1.msim

I want to compare two signals with relational block in Maplesim, i.e. greater or equal

The output signal should be a pulsed signal which represents the intervals where one signal is greater or equal to the second signal

How to do this

Thanks

How to obtain a triangular signal with Maplesim

Alger — Fri, 13 Apr 2012 20:23:25 Z

How to obtain a triagular signal ?

Thanks

simulation end time

xumin — Wed, 11 Apr 2012 12:46:08 Z

Hi all,

I set the simulation end time t_f=5000s,but after running the model,the result can just simulate to 2500s.I don't kown what has gone wrong.There is a power function in the model.When the power is set as 3,the end time can just as long as 2500 second.that is to say,the result show not greater than 2500 second.When the power is set as any other number,4 for example,it can simulate 5000 second.

please help me .

Lookup table not in ascending order

zoli123 — Fri, 06 Apr 2012 13:02:53 Z

Hi!

My problem is that MapleSim refuses to use my interpolation table, and the simulation stops, because it says the first column is not in ascending order. Seems easy to solve, but it is not! The column IS in ascending order, I even arranged it several times in Excel. I can't figure out what is the problem.

If someone has time, I attached the interpolation table.

Best regards; e6.xlsx

Error in Modelica Custom Component generation

onder — Thu, 05 Apr 2012 18:13:48 Z

Hi all,

I have a modelica custom componet which has inputs from angle/speed sensors and the output is a vector. I have an error "Attempted to retrieve property of unknown component". Can anyone see mistakes from the code below;

model basisFunction
    extends Maplesoft.Icons.CustomComponent;
    parameter Real bPen[sn*sn] "The normalized output for the basis function";
    parameter Integer sn=5 "The number of samples in each axist";

Repeating Look-up Tables

rwong1231 — Thu, 05 Apr 2012 01:26:48 Z

Hmmm, I'm not sure if this possible but worth asking...and maybe useful for creating custom loop simulations:

I have a trajectory profile (via 1D Lookup Table in MapleSim) whose duration is for 10 seconds.

Is it possible to create a simulation with an end time greater than 10 seconds and have the 1D Lookup Table repeat its profile after it ends:

Example: Simulation end time = 20second. Thereby having the Lookup Table execute twice.

Suggestions on approach? Thanks.