PPolySim OS

Second-Order Step Response

Poke a system with a sudden change and its damping ratio decides everything — a clean settle, a bouncy overshoot, or a sluggish crawl.

Second-Order Step ResponseLive

Controls

Presets

A second-order system's response to a step is set entirely by its damping ratio and natural frequency. Low damping overshoots and rings; ζ = 1 is the fastest response without overshoot; high damping is sluggish. Educational tool.

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Data Inspector

Overshoot25%
Settling time (2%)3.33 s
Peak time1.14 s
Regimeunderdamped

Governing equation

Reading this result: Underdamped: the response overshoots to ~125% of target and rings before settling in about 3.3 s. Lower ζ means bigger overshoot and more oscillation.

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How it works

A second-order system responds to a step according to its damping ratio ζ and natural frequency ωₙ. Overshoot depends only on ζ; settling time scales with 1/(ζωₙ). These metrics are the standard vocabulary of control design. Educational tool.

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Frequently asked questions

Is this step response calculator tool really free?▾
Yes. Second-Order Step Response runs entirely in your browser using your device's own compute, so local use is free forever. You only pay Compute Tokens if you scale a job to the cloud.
Do I need to install anything?▾
No. Everything runs client-side in a modern browser — no downloads, no license, no account required to start.
Can I save or share my simulation?▾
Create a free account to save projects, and use a shareable embed or minted DOI to publish a live, interactive version anywhere.
How accurate are the results?▾
The solver uses established numerical methods, but results are for research and educational purposes and should be validated against experiment or professional review before you rely on them.