Is there a way to reset after a given time the initial condition of an integrator block in simulink?

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Luca Caffiero
Luca Caffiero 2020-12-5
评论： Luca Caffiero 2020-12-6
I have to simulate the attitude determination of a satellite integrating the measurements of the angular velocities I got from a gyroscope. As initial condition I can use the values i got from other sensors to start the integration. by comparison with the exact attitude i notice that the integrated one from the measurement diverges (of course) as time goes. i was suggested to reset the integral after some time by putting a new initial condition but i haven't found a way to do it so my question is: how can i change the initial value of the integration after some time to reduce the errors introduced by the integration?
thanks to whoever can clarify me this point

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Paul
Paul 2020-12-5
If you haven't already, check out section Resetting the State on the Integrator block doc page.
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Paul
Paul 2020-12-6
The external initial condition input to the the integrator can be the output from another block. It sounds like you want to use the true quaternion as the input to the initial condition port of the integrator block in question. Then this integrator will initialize to the true quaternion at t=0 and reset to the true quaternion based on the input to to the external reset port.

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