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Resources for the course Airborne Wind Energy
MIT License
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Optimisation fails to find correct minimum when increasing maximum reel-in speed #5

Open goobke opened 1 month ago

goobke commented 1 month ago

When increasing the maximum reel-in speed from 8 m/s to 12 m/s, the optimisation fails to find the correct minimum for the reel-in factor when it enters wind-speed-regime 2 and then successfully finds it again after it has reached the maximum reel-in speed of 12 m/s.

operations_const_LoD_in powercurve_const_LoD_in reelspeeds_const_LoD_in

By changing the starting point of the optimisation to something closer to the optimum the solution gets closer to the expected value.

Changing the optimisation method from ‘COBYLA’ to ‘SLSQP’ seems to fix this issue, however, it creates some noise in the first half of the curve as seen below.

operations_const_LoD_in powercurve_const_LoD_in reelspeeds_const_LoD_in

rschmehl commented 1 month ago

Thank you for the detailed description!