I'm trying to apply edge filter to an image using Xilinx blocks,
I used 5x5 buffer then I connected the 5x5filter to it.
But it keeps telling me:
Illegal Period, This blocks attempts to set period that is a non-integer multiple of the system rate
Error occurred during "Block Configuration".'
which I did not understand.
Similar such problem(with solution) is posted in Xilinx Forum. Go through the link given below:
http://forums.xilinx.com/t5/DSP-Tools/Can-any-1-help-me-regarding-FIR-implementation-in-system/m-p/33650#M1463
It means that the sample time of one of the block isn't an integer multiple of the model's minor timestep. Check the configuration parameters for the model and the parameters of your new blocks.
I don't think this has anything to do with the Xilinx blocks specifically.
Related
the basic idea behind the modeling issue is a breakdown of a production machine.
I would like to model this by setting the arrival rate (simply arrivals per second) to zero (Source.rate = 0). After the machine is repaired, the arrival rate is set to its actual value again (e.g., Source.rate = 5). While the first command does the job, the second does not seem to have any effect, i.e. new agents are not created.
The segment of the model is rather simple: Source --> Select Output (decision about breakdown) --> true: go on in production; false: delay (repair machine) --> go on in production.
Source.rate = 0 is called at the out port (false) of "breakdown" and Source.rate = 5 at the out port of "repair".
https://i.stack.imgur.com/hqGoI.png
Of cause, this issue might be modeled differently (e.g., using hold with disabled "forced pushing"), however, it is not clear for me why my approach does not work.
Thanks in advance!
Instead of using source.rate=5; use source.set_rate(5);
To expand on Felipe's answer with an explanation:
Instead of using source.rate=5; use source.set_rate(5);
rate is effectively a Parameter (in the AnyLogic sense) of the Source block. (All AnyLogic's Process Modeling blocks are actually themselves Agents developed by AnyLogic, and thus with Parameters, Variables, etc.)
You can set an AnyLogic Parameter directly (via just assigning a value as you did), but they also all have a set_<parameter name> method (function) which should really always be used instead because this triggers any internal on-change logic for this Parameter. It is only this triggered logic (internal to the Source block) which causes the Source to 're-evaluate' the rate properly.
(You can use on-change logic for Parameters in your own models, and need to do so when altering a parameter requires some 'adjustments' to the rest of the model; i.e., in situations where the change doesn't 'just work' due to other bits of the model reading the new value after the change point.)
I don't know why your model doesn't work (maybe more details of your model is needed), but a simple solution which I tested and worked, is as below:
You can set the source's "Type of arrival" to "calls of inject() function", add an event to your model and set its "Trigger type" to "Rate" and set its rate value to 5. Then in action code of the event use below code:
if(yourCondition)
{
source.inject(1);
}
I hope it helps you.
I am using Simulink to model a waste recycling plant out of a number of masked blocks that I created, representing sorting steps, buffers etc. Each module (that is, a masked block) has a failure probability, modeled using Discrete Events. If a failure event occurs, a triggered subsystem calls an Interpreted Matlab Function ("outside" of simulink). This function is supposed to set a parameter status of the masked block representing the module that failed as well as the upstream modules' status to 0 (because obviously, everything upstream has to stop as well or the material will just pile up).
`set_param(gcb, 'status', num2str(status));
PortConnectivity = get_param(gcb,'PortConnectivity');
sources = PortConnectivity.SrcBlock;`
Basically, this will be looped until I reach a block with no own Source Block.
This all works quite well, except for one problem: The gcb command gives me the block path to the last block I highlighted manually, and not to the block that called the Interpreted Matlab function. Is there any way to get the calling block's handle (which I would use with it's Parents parameter to access the Mask's status)? (A similar question has been asked here, with no results...)
I hope you get my problem - I'll be happy to elaborate if anything's unclear; I am not claiming to be a Simulink expert, so sorry for maybe using wrong terminology.
Ok, for everyone stumbling upon this:
For the mask that contains the caller of the Matlab Interpreted Function, in the mask editor I define a parameter 'this_block' (turn visibility off), that I initialize in the Initialisation pane using
parent = get_param(gcb,'Parent');
set_param(gcb, 'this_block','Parent')
Since this masked block (responsible for modelling the failure and its upstream communication) is itself used in another masked block also present in the library (responsible for modeling the module's behaviour), I also had to check "Allow library blocks to modify it's contents" in the mask editor Inititlization pane of the parent's mask. The parameter 'this_block' is then handed over as one of the input arguments of the called function (in my case, status_communication(u, this_block)).
I want to continuously read simulink signal data into the command line while the simulation is running. get_param() seems to be blocking so that doesn't quite work when put in an infinite while loop.
I'm now trying to use a UDP send block but I can't seem to receive data. My UDP block sends data to localhost over remote port 25000 and local port 25001.
In matlab I use the following code but it simply times out with no data
u=udp('127.0.0.1', 25001,'LocalPort',25000);
fopen(u)
fread(u)
fclose(u)
delete(u)
What are my options to continuously read out simulink signal data into Matlab CLI?
Control Simulation Using the "set_param()" command like follows:
set_param('sys','SimulationCommand','WriteDataLogs')
For a working example, type "sldemo_varsize_basic" in the matlab command window. Then above command becomes
set_param('sldemo_varsize_basic','SimulationCommand','WriteDataLogs')
If you set the simulation time to sufficiently large and start the simulation, the "simout, simout1", "tout" and "xout" variables are created/updated in the workspace every time you issue the command above.
Unfortunately, I was not able to find a good quality documentation of this feature.
Are you trying to store the value of your model outports DURING simulation? This is not possible because the variables 'simout, simout1", "tout","xout" etc are created only once simulation is OVER.
In order to read/store the value of outports during simulation, you will have to attach an 'Runtime Object' to the outports.
Refer 'Access Block Data During Simulation' in the Simulink documentation or see this link: http://in.mathworks.com/help/simulink/ug/accessing-block-data-during-simulation.html?s_tid=gn_loc_drop
Hope it helps :)
This question has already been answered here using RunTime Objects as I have described above:
https://stackoverflow.com/a/17006419/6580313
OK, I've been struggling with this for a while. What is the best way to accomplish the following:
where Reaction Wheel 1-4 are links to the same block in a library. When the Speed Counter, Speed Direction and Current signals are added to the final bus output as shown, MATLAB (rightfully) complains:
Warning: Signals 9, 10, 11, 12 entering Bus Creator
'myAwesomeModel' have duplicated names 'Current'. These are being made unique
by appending "(signal #)" to the signals within the resulting bus. Please
update the labels of the signals such that they are all unique.
Until now I've been using a "solution" like this:
that is, place a size-1-mux/gain-of-1/other-dummy block in the middle, so the signals can be renamed into something unique. However, I really like to believe that The MathWorks has thought of a better way to do this...
What is the "proper" way to construct bus signals like this? It feels rather like I'm being pushed to adopt a particular design/architecture, but what that is precisely, eludes me for the moment...
It was quite a challenge for me but looks like I kinda sorted it out. Matlab R2007a here. I'll do the example with an already done subsystem, with its inputs, outputs, ...
1- In Block Properties, add a tag to the block. This will be done to identify the block and its "siblings" among the system. MY_SUBSYSTEM for this example.
2- Block Properties again. Add the following snippet in CopyFcn callback:
%Find total amount of copies of the block in system
len = length(find_system(gcs,'Tag','MY_SUBSYSTEM'));
%Get handle of the block copied/added and name the desired signal accordingly
v = get_param(gcb,'PortHandles');
set(v.Outport(_INDEX_OF_PORT_TO_BE_RENAMED_),'SignalNameFromLabel',['BASENAME_HERE' num2str(len)]);
3- In _INDEX_OF_PORT_TO_BE_RENAMED_ you should put the port signal index (starting from 1) that you want to have renamed for each copy of the block. For a single output block this should be 1. BASENAME_HERE should be the port basename, in this case "Current" for you.
4- Add the block to the desired library, and delete the instance you used to create this example. From there on, as you add from the library or copy an existing block, the outport should name Current1, Current2, Current3, and so on. Notice that you could apply any convention or formatting.
Hope this helps. It worked for me, don't hesitate to ask/criticize!
Note: Obviously, as the model grows, this method may be computer-demanding as find_system will have to loop through the entire model, however looks like a good workaround for me in small-medium sized systems.
Connect a Bus Selector to each Data Output. Select the signals you want and set "Output as bus". Then connect all Bus Selectors to a Bus Creator.
simulink model
I took the 'Performance of Three PSS for Interarea Oscillations' simulink model. I have disabled the link for 'Delta w PSS' block and modified (removed some connections and added new blocks) it according to my usage. Now when I simulate I am getting an error "Initialization commands cannot be evaluated" on this 'Delta w PSS'block.
What should I do to solve this problem?
Thanks
My guess is that it cannot initialize some of the mask parameters. If you right-click on the block and choose "View Mask...", you'll see what the initialization commands are under the "Initialization" block (you may have to go back to the library block). Unfortunately, once you start breaking/disabling library links and modifying library blocks, you're on your own...
In Power electronics, I saw this error and I have added a block named powergui and it solved. to find it I searched powergui
it may help you to find such this block in your kind of use