通过python更改simulinkMatlab的常量块

问题描述

当我在m文件中定义要在Simulink中使用的变量时（预先定义了action1和action2）

   %  action1=1
    %  action2=2
    set_param('try11/Constant2','Value','action2')
    set_param('try11/Constant','action1')
    sim('try11.slx')
    s1=try11/Constant

没有错误报告，并且模拟开始。 try11只是一个简单的Simulink文件，其中添加了“ Constant2”（action2）和“ Constant”（action1）。但是，当我尝试在Python中运行以下代码时。

    eng = matlab.engine.start_matlab()
    eng.workspace['action2'] = matlab.double([0.0])
    eng.workspace['action1'] = matlab.double([1.0])
    eng.tryy(nargout=0)
    reward = eng.eval('ans.output')
    print(reward)

我收到以下错误消息。

        Error using tryy (line 3)
        The block diagram 'try11' is not loaded. Traceback (most recent call last):   File "/home/majid/anaconda3/lib/python3.8/site-packages/IPython/core/interactiveshell.py",line 3343,in run_code
        exec(code_obj,self.user_global_ns,self.user_ns)   File "<ipython-input-2-06fc4fb2fc97>",line 1,in <module>
        runfile('/home/majid/PycharmProjects/reinforcementlearning/Main_Directory/mattry.py',wdir='/home/majid/PycharmProjects/reinforcementlearning/Main_Directory') File "/snap/pycharm-professional/218/plugins/python/helpers/pydev/_pydev_bundle/pydev_umd.py",line 197,in runfile
        pydev_imports.execfile(filename,global_vars,local_vars)  # execute the script   File "/snap/pycharm-professional/218/plugins/python/helpers/pydev/_pydev_imps/_pydev_execfile.py",line 18,in execfile
        exec(compile(contents+"\n",file,'exec'),glob,loc)   File "/home/majid/PycharmProjects/reinforcementlearning/Main_Directory/mattry.py",line 13,in <module>
        eng.tryy(nargout=0)   File "/home/majid/anaconda3/lib/python3.8/site-packages/matlab/engine/matlabengine.py",line 70,in __call__
        return FutureResult(self._engine(),future,nargs,_stdout,File "/home/majid/anaconda3/lib/python3.8/site-packages/matlab/engine/futureresult.py",line 67,in result
        return self.__future.result(timeout)   File "/home/majid/anaconda3/lib/python3.8/site-packages/matlab/engine/fevalfuture.py",line 82,in result
        self._result = pythonengine.getFEvalResult(self._future,self._nargout,None,out=self._out,err=self._err) matlab.engine.MatlabExecutionError: Invalid Simulink object name: try11/Constant2.

解决方法

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python simulink