I want to extract data from object detection sensor in Matlab 2018 (Mobile Robotics Simulation Toolbox). This data is the display vector array form of dimension (1x3) range; angle and label. I want to use this data for object avoidance controller using fuzzy logic. When I use demux to split this data into three elements, I get error “Simulink cannot propagate the variable-size mode from the output port 1 of 'dynamicModelPID/Object Detector' to the input port 1 of 'dynamicModelPID/Demux'. This input port expects a fixed-size mode. Examine the configuration of 'dynamicModelPID/Demux' for one of the following scenarios: 1) the block does not support variable-size signals; 2) the block supports variable-size signals but needs to be configured for them “
I have tried using different blocks for this purpose but still I get same error. I could not find out proper solution of this problem. Any knows about it
You can use the points of the object detector as reference signals for the colision
Hi Zahid Razzaq,
Even if you use the 'variable-size' output ports of the Object Detector as the reference signals for the input ports of fuzzy collision avoidance controller, you may still get the 'variable-size signal' error.
Even if you can configure the 'Mux/Demux' blocks to support the variable-size signals, I doubt that your designed 2-input FIS can handle the variable-size signal from the output port 1 of the Object Detector.
The variable-size signal means that the number of elements in the signal dimension can change during the simulation. Your 2-input FIS expects to receive two signals only. For more info, please refer to the following links:
https://www.mathworks.com/help/simulink/ug/simulink-models-using-variable-size-signals-demos-modeling-features-variable-size-signals-or-type-varsizedemos-.html
https://www.mathworks.com/help/simulink/ug/variable-size-signal-basics.html
Other possibility is to write a fuction that takes the values of the block during the simulation and used for any other propuse
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