Two interactive simulations of how systems respond and how we steer them — the second-order system that underlies almost everything that moves, and the controller that tames it.
Tune proportional, integral, and derivative gains and watch the closed-loop step response settle, overshoot, or oscillate — live.
The canonical second-order system with animated playback — set the damping and watch it ring, settle critically, or crawl back overdamped.