MATLAB Interface

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HANtune can be interfaced with MATLAB® (and by extension Simulink®). We can do this by using the MATLAB engine and calling it from a script.

Note: You will need to have installed a version of MATLAB® with the Java MATLAB engine.


The scripts needed to run this example can be found in HANtune\scripts\examples\MATLAB_Interface. These are:

  • ConnectToMatlab.py
  • ReadSimulinkModel.py
  • createDaqList.m
  • getDaqListData.m


Connecting to the MATLAB Engine

The first thing we need to do is tell HANtune where to find the MATLAB engine.

Open ConnectToMatlab.py and change the following line to the location of your MATLAB engine:

#Change this to your location of the MATLAB engine
enginePath = "C:\Program Files\MATLAB\R2017b\extern\engines\java\jar\engine.jar"


#Add matlab engine to the classpath
from datahandling import CurrentConfig
CurrentConfig.getInstance().addSoftwareLibrary(enginePath)
#Import matlab engine
from com.mathworks.engine import MatlabEngine

#Initialize matlab engine
engines = MatlabEngine.findMatlab()
engine = MatlabEngine.connectMatlab(engines[0])
#Add engine as a global variable to all interpreters
from nl.han.hantune.scripting import ScriptingManager
ScriptingManager.getInstance().setGlobal("engine", engine)
#Redirect matlab output to HANtune console
from java.lang import System
from nl.han.hantune.scripting import Console
System.setOut(Console.getGUI().getOut())
System.setErr(Console.getGUI().getErr())

Reading data from a running Simulink model

Set your model

#Change these to the name and location of your model
modelName = 'MyModel'
modelPath = 'C:\Users\Michiel Klifman\Desktop'


#Add folders to MATLAB path
from java.lang import System
scriptPath = System.getProperty("user.dir") + "\scripts\examples\MATLAB_Interface"
engine.eval("addpath('" + scriptPath + "')")
engine.eval("addpath('" + modelPath + "')")

Creating a daq list

#Create a daqlist from signals in the model
result = engine.feval(2, 'createDaqList', modelName, 'signals')
daqItemNames = result[0]
daqList = result[1]
daqSize = len(daqList)
#Create a signal for each item in the daq list
signals = []
removeAllSignals()
for name in daqItemNames:
	signal = createSignal(name)
	signals.append(signal)
updateLayout()
print 'DAQ list created with ' + str(daqSize) + ' items'

Reading

#Start the simulation
engine.eval("set_param('" + modelName +"','SimulationCommand','start');")
print 'Simulation started...'


#Read data from the model in Simulink and add it to the signals in HANtune
while (True):
	data = engine.feval('getDaqListData', modelName, daqList, daqSize)
	if not data:
		break

	i = 0
	for value in data:
		signals[i].setValueAndTime(value, 0)
		i += 1

print 'Simulation completed!'