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Add stroke amplitude as a part of the model and try different stroke magnitudes for design scaling tests #127

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merged 38 commits into from
Jan 30, 2020

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@avikde avikde commented Jan 29, 2020

  • add as optional param
  • test scaling the stroke
  • opt design at small and big stroke angles and test scaling

This is related to #121

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avikde commented Jan 29, 2020

Opt result at phi=0 (default) Opt minal=1.5, τ2/1 lim=2.0 => 0, [3.911 2.536 1.142 3.629 5.073 59.165 0.148], fHz=149.8, al[mg]=117.1, u∞=68.4, pow=9.5, J=4849.1, AR=3.9

image

phi=120 Opt minal=1.5, τ2/1 lim=2.0 => 0, [4.0 3.291 1.229 3.571 6.582 61.44 0.177], fHz=125.8, al[mg]=149.4, u∞=93.1, pow=11.6, J=6806.7, AR=3.8

image

Also increasing hinge ampl a bit (better kinematics?) Opt minal=1.5, τ2/1 lim=2.0 => 0, [3.66 3.291 0.98 3.389 6.582 52.727 0.128], fHz=173.2, al[mg]=120.0, u∞=81.2, pow=10.1, J=7312.4, AR=3.9

image

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avikde commented Jan 29, 2020

working on the major scaling plot

image

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avikde commented Jan 29, 2020

Scatter plot of points generated by looping through phi and minlift

image

Next will plot various metrics of the opt results.

Data is in
scaling1.zip

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avikde commented Jan 29, 2020

added mech pow
scaling1.zip

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avikde commented Jan 29, 2020

This should help find the parameters to try with opt1

image

Problem might be due to some of the param space constraints kicking in.

  • try to find which constraint

With ref to the plot above, bottom right: Opt minal=1.4, τ2/1 lim=2.0 => 0, [3.644 3.291 1.043 3.371 6.582 52.314 0.132], fHz=168.7, al[mg]=112.5, u∞=82.0, pow=9.8, J=7084.9, AR=3.9

image

top right Opt minal=1.9, τ2/1 lim=2.0 => 0, [3.76 3.291 0.814 3.491 6.582 55.294 0.12], fHz=185.9, al[mg]=148.6, u∞=83.0, pow=11.4, J=8328.2, AR=3.9

image

Debugging further, these both have the same T

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avikde commented Jan 30, 2020

Finally!!!

With Rpow = 0.2e3
scaling1_0.2e3.zip

With uinf
image

With FD
image

With Rpow = 1.1e3
scaling1_1.1e3.zip

image

with 0.1
scaling1_0.1e3.zip

image

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avikde commented Jan 30, 2020

Everything makes sense if we leave out the top right

  • reduces AR, increases Aw, lowers freq a lot
  • mech pow increases more than expected

image

With slightly scaled mact
scaling1_0.1e3_hl.zip

image

@avikde avikde merged commit 3f9eaa4 into master Jan 30, 2020
@avikde avikde deleted the w2d-strokechange branch January 30, 2020 21:46
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avikde commented Jan 31, 2020

scaling1

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