simulink

问题 I am implementing several c s-functions. They have to rely on the same pointers and variables, inedependet of the current s-function. Basically I want to instantiate all variabels and pointers in one "setup" s-function (inside mdlInitialize) and then be able to use these variables an pointers in different s-functions in their mdlOutputs function. Every s-function will be written in c. I could not find any usefull hint in the mathworks help. Do you have any idea? Thanks. 回答1: There are several

问题 I substituted my originial question, the problem is still the same, but the conditions are now different. To review the original question, have a look at the revisions. I'm looking for a way to interactively select the signals I want to get displayed in my scope Block. The Bus Selector Block with the property Output as Bus does exactly that. I can select all desired signals conveniently without changing any block or signal dimensions. But the scope block can obviously not handle properly

问题 How do I generate following signal in simulink: t=(0:1000)/1000*10*pi; I want to build the model of the following matlab code: t=(0:1000)/1000*10*pi; x = (t).*sin(t); y = (t).*cos(t); z = t; 回答1: This is fairly basic stuff. Have you gone through any Simulink tutorial, introduction videos/webinars or even the getting started guide of the documentation? Here are a few suggestions to help you answer your question: Set the stop time of your model to 1000s and use a fixed-step solver with a step

问题 Why is one ans removed when I assign y? I want to return the two descriptions. x = rmi('get',gcs) x = 2x1 struct array with fields: doc id linked description keywords reqsys >> x.description ans = FirstReq ans = SecondRec >> y = x.description y = FirstReq >> y y = FirstReq 回答1: You probably need to use the {} : >> x.description ans = FirstReq ans = SecondRec >> y = {x.description} y = { [1,1] = FirstReq [1,2] = SecondRec } You can then index into y using either () (output will be a cell array

问题 I am new to Matlab and I'm trying to make a simple circuit in Simulink library Simscape. I have an AC voltage source with RMS value 50V and frequency 50Hz. But as shown in the image, the scope displays a noise, not a sine wave as I expected. What could be the problem? Thanks. 回答1: No, the scope does display the correct signal, which is a sine wave at 50Hz. 50Hz corresponds to a period of 20ms, so if you want to see the sine wave correctly, you need to zoom in until you have a sufficient

问题 I am using a MATLAB m file code which loads a simulink file, runs it and evaluats it so many times inside a complicated parallel loop. It runs perfect at MATLAB environment. When compiling the code via deploytool command, installing it and running it from command line, I would have a difficult time. At the line where it is loading the model, mymodel= ... ; load_system(mymodel); I get the following error C:\Program Files\mymain\application>Warning: Name is nonexistent or not a directory: model

问题 I need to access the values of variables in MATLAB's workspace of type Simulink.parameter : CAL_vars = dsdd('find','/path/CAL','ObjectKind','Variable','Property',{'name' 'Class' 'value' 'CAL'}) %gets ids of variables in data dictionary i = 10 for i=1:length(CAL_vars) var_name = dsdd('GetAttribute',CAL_vars(i),'name'); % gets names of variables in data dict var_eval = eval(var_name); % this works in standalone script and it does exactly % what I need, but once i put it in the function I need

问题 When I use find_system(gcs,'BlockType','SubSystem') it returns things that are not subsystems (AFAIK) In my case the things that are called subsys L1 -x and SubsysX L2 - z are subsystems, but the names are just for debugging purpose, so I can't use the names to match. Why is [1x51 char] and Sine and RealisesUID appearing? I only want the subsystems showing up in the Model Browser tree. 'test_simulinkmodel/RealisesUID' 'test_simulinkmodel/subsys L1 - 1' [1x51 char] 'test_simulinkmodel/subsys

问题 I am using Matlab R2013a. The problem appears when I try to use Simulink Coder to generate Visual C++ code. I've got this error even though I have Visual Studio 2013 installed on my computer already. When I look at list of programs that are installed on my computer I see Visual C++ 2008, 2010 and 2012. When I type the command mex -setup Matlab just can see a compiler LCC. But I need a Visual C++ compiler (which , technically, I already have) seen by Matlab. How can I do that? Isn't mex -setup

问题 I am trying to use the edge(I,'sobel') method inside a Matlab function block in Simulink(MATLAB 2013a). When I try to compile, I get the error "The function 'edge' is not supported for standalone code generation". I know there is an edge detector block , but I want to call the function with in the Matlab function block. How to get around this. 回答1: If you have Computer Vision System toolbox you can use vision.EdgeDetector System object. If you have edge detector block then you already have