fullseye

synthesize_speed_ramp — ACOUSTICS synthesis op

• データ種: なし → table(引数だけで決まる op —— 画像やデータの入力を取らない)
• 呼び出し: import fullseye as fs; fs.ledger.synthesize_speed_ramp(rate=5000.0, duration=4.0, rpm_start=600.0, rpm_end=1800.0, orders=(1.0, 3.5), amplitudes=None, resonance_hz=None, noise_sigma=0.0, seed=None) (実装を直接呼ぶなら import acoustics; acoustics.synthesize_speed_ramp(rate=5000.0, duration=4.0, rpm_start=600.0, rpm_end=1800.0, orders=(1.0, 3.5), amplitudes=None, resonance_hz=None, noise_sigma=0.0, seed=None)、台帳から引くなら opsacoustics.get("synthesize_speed_ramp"))

使い方

A run-up: components locked to shaft order, optionally one fixed in Hz.

Order tracking has no meaning at constant speed, so its ground truth needs a signal whose shaft rate moves. Here the shaft rate ramps linearly from rpm_start to rpm_end and each component’s instantaneous phase is 2 pi * order * revolutions(t) — so it is locked to the shaft exactly, by construction, and its order is known to machine precision.

resonance_hz adds one component at a fixed frequency instead. That is the discriminating case: after angular resampling an order stays put and a resonance smears, which is the whole diagnostic value of the transform.

Returns a dict, because a speed record without its speed profile is not analysable: signal (the waveform), rpm (per-sample shaft rate), revolutions (cumulative, per-sample), rate, duration, orders, total_revolutions, resonance_hz, and max_component_hz.

Raises ValueError: non-real / string / bool scalars, non-positive rate / duration / rpm_start / rpm_end, an empty or non-finite orders, an amplitudes of the wrong length, a length over :data:MAX_SAMPLES, and any component reaching Nyquist at the fastest point of the ramp — checked at max(rpm), not at the mean, because a ramp that is legal on average can alias at its top end and produce a perfectly plausible spectrum.

詳しい使い方ガイド

• acoustic_condition_monitoring ファミリ ガイド

参考(サンプルデータ・文献)

• サンプルデータ カタログ(DL URL / ライセンス) — 2-D は skimage.data(BSD/public)+ 合成、3-D は実データ源(Stanford/PDS 等)の DL URL。
• 演算子の来歴・参考文献 — この op 族の元になった研究/手法の出典。
• アルゴリズムの正典(著者・年)と用途は上記ファミリ使い方ガイドに記載。

実行できる例(この op を実際に呼ぶ検証済みサンプル)

• acoustic_condition_monitoring — py -3.11 examples/acoustic_condition_monitoring.py

型が繋がる次の op(table を入力に取れる)

istft

同カテゴリ(synthesis)

synthesize_bearing_signal

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Provenance: acoustics.py — ACOUSTICS operator registry. この per-op ノートは tools/opdocs.py md が自動生成(手編集しない)。

© 2026 Kazufumi Furuse — Fullseye operator documentation. Licensed under Apache-2.0.

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