As I understand, at every simulation time step, you want to save the position and velocity outputs of the “Orbit Propagator Numerical (high precision)” block and perform some operations with this data before proceeding to the next time step. This can be done by stepping through the simulation using controls in the Simulink Toolstrip. Steps for this are as follows:
- In the “Data Import/Export” section of Model Configuration Parameters, make sure the “Output” and “Single simulation output” options are enabled. Set the output “Format” to “Structure”.
- Give labels to the position and velocity output signals (say “x” and “v”) and connect them to outport blocks.
- In the Simulink Toolstrip, on the “Simulation” tab, click “Step Forward”. The simulation will start and pause after calculating values for the first simulation time step.
- The values of the output data at this time step will now be saved to the MATLAB workspace in the “Simulink.SimulationOutput” object. Access and perform operations with the data as required in a MATLAB script:
%Assuming output variables have default names out and yout
%Assuming position output is connected to outport 1
pos=out.yout.signals(1);
%Assuming velocity output is connected to outport 2
vel=out.yout.signals(2);
%Get data at current time step
curpos=pos.values(end,:);
curvel=vel.values(end,:);
%Process current position and velocity data as required
- Click “Step Forward” to proceed to the next time step and repeat the process.
You can refer to this documentation for more information on Stepping through simulations:
This process can be automated in a MATLAB script using a “Simulation” object as mentioned in the following documentation:
Hope this addresses your query.
