How do I use SatelliteScenario Groundstation objects inside of a Parallel Computing Toolbox parfor loop

Question

William Hunter 2021-10-14

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1564076-how-do-i-use-satellitescenario-groundstation-objects-inside-of-a-parallel-computing-toolbox-parfor-l

评论： KRALFALLAH Mansour 2022-4-24

I would like to compute access for a groundstation with multiple constellations using the Parallel Computing Toolbox. However, this simple example is not working. What am I doing wrong?

parfor idx = 1:2

startTime = datetime("today");

stopTime = startTime + days(1);

sampleTime = 60;

aScenario = satelliteScenario(startTime, stopTime, sampleTime);

aGroundstation = aScenario.groundStation(0, 0);

end

Here's the error I am getting:

>> SimpleTest
Error using matlabshared.satellitescenario.GroundStation
Invalid default value for property 'ColorConverter' in class 'matlabshared.satellitescenario.ScenarioGraphic':
Error defining property 'ConvertedColor' of class 'matlabshared.satellitescenario.internal.ColorConverter'. Class named
'matlab.graphics.datatype.RGBColor' is undefined or does not support property validation.
Error in satelliteScenario/groundStation
Error in SimpleTest (line 1)
parfor idx = 1:2

Thank you!

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KRALFALLAH Mansour 2022-4-24

Hello everyone,

I use Matlab 2020a, pls could you tell me in which version can I find the aerospace blocksets toolbox which countains the Spacecraft and orbit propagator blocksets.

Thank you in advance.

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Answer 1

Edric Ellis 2021-10-15

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1564076-how-do-i-use-satellitescenario-groundstation-objects-inside-of-a-parallel-computing-toolbox-parfor-l#answer_809166

Thanks for reporting this problem. You can work around this for now like so:

fetchOutputs(parfevalOnAll(@() delete(figure), 0));

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Edric Ellis 2021-10-15

Just run that line after you open your pool, and before you run the parfor loop, like this:

% Explicitly create the parallel pool, if necessary
if isempty(gcp('nocreate'))
    parpool();
    % Work around problems by creating and immediately deleting a figure
    fetchOutputs(parfevalOnAll(@() delete(figure), 0));
end
% Run stuff in parfor
parfor idx = 1:2
    startTime = datetime("today");
    stopTime = startTime + days(1);
    sampleTime = 60;
    aScenario = satelliteScenario(startTime, stopTime, sampleTime);
    aGroundstation = aScenario.groundStation(0, 0);
end