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Enh/zero inertia tensor check #833

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Enh/zero inertia tensor check #833

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8af308b
ENH: zero inertia check on rocket initialization (issue #826)
aZira371 Jun 13, 2025
a97c2b2
MNT: correction to input of inertia tensor into abs():
aZira371 Jun 20, 2025
cf494c4
Merge branch 'develop' into enh/zero-inertia-tensor-check
MateusStano Jul 4, 2025
fb94874
DEV: format and changelog
MateusStano Jul 4, 2025
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9 changes: 9 additions & 0 deletions rocketpy/rocket/rocket.py
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Original file line number Diff line number Diff line change
Expand Up @@ -293,6 +293,15 @@
self.I_12_without_motor = inertia[3]
self.I_13_without_motor = inertia[4]
self.I_23_without_motor = inertia[5]
inertia_matrix = Matrix([
[self.I_11_without_motor, self.I_12_without_motor, self.I_13_without_motor],
[self.I_12_without_motor, self.I_22_without_motor, self.I_23_without_motor],
[self.I_13_without_motor, self.I_23_without_motor, self.I_33_without_motor],
]) # Initial Inertia Tensor determinant singularity check
if abs(inertia_matrix) == 0:
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Copilot AI Jun 22, 2025

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Using abs(inertia_matrix) to check for a singular matrix might not correctly compute the determinant; it is recommended to use the proper determinant method (e.g., inertia_matrix.det()) for an accurate singularity check.

Suggested change
if abs(inertia_matrix) == 0:
if inertia_matrix.det() == 0:

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raise ValueError(

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"The rocket inertia tensor is singular (determinant is zero). "
)

# Define rocket geometrical parameters in SI units
self.center_of_mass_without_motor = center_of_mass_without_motor
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