Hi everyone,
I’ve built an ABS braking system model in Simulink to compare ABS vs non-ABS performance.
The model runs fine, but the stopping distance always shows 916 m, even after I changed the parameters.
Model summary:
v0 = 22 m/s
m = 1200 kg
I = 2 kg·m²
r = 0.3 m
g = 9.81 m/s²
The model computes slip as (v – ωr)/v, and integrates v to find stopping distance.
However, the scope still shows 916 m, which matches the result when m = 5 kg and I = 5 kg·m².
So I suspect some constants inside my model are still using the old values.
What I’ve checked:
Updated all workspace variables (m, I, r, etc.)
Pressed Ctrl + D to update the diagram
Looked inside the blocks, but the result didn’t change
What I need help with:
How to make Simulink use the updated workspace variables
How to confirm if any block is still using hardcoded numbers (5, 5)
Whether there’s a unit-conversion gain (×1000) on the stopping-distance output
I’ve attached my ABS.slx file for reference.
Thanks in advance!
