10 cm Road Step
A 0.1 m road step begins at 0.5 s. The calibrated causal limit is 0.05 m under the ±80 kN actuator constraint.
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Engineering task brief
Active Suspension Engineering Lab
Use an active quarter-car suspension to reject road inputs. The controlled output must return to zero, so absolute settling bands replace percentage overshoot.
- Model
- Four-state quarter-car active suspension
- Body mass
- 2500 kg
- Wheel mass
- 320 kg
- Road input
- w (m)
- Primary output
- x1 - x2 (m)
Pothole Pulse
A -0.05 m pothole lasts 0.25 s.
Body Mass +10%
Repeat the road step with 10% more body mass.
Actuator constraint: Actuator force must remain between -80000 and 80000 N. Your final delivery includes a controller choice, experiment evidence, multi-scenario validation, and a short design conclusion.
Learning objectives
- ✓ Understand disturbance rejection
- ✓ Use absolute settling for a zero target
- ✓ Balance comfort and suspension travel
- ✓ Observe actuator cost and tire deflection