Engineering & Signal Analysis

Harmonics, Damped Oscillations, Rational Models & Polynomial Regression

General-purpose and engineering transfer function models for vibration analysis, electrical resonance, sensor calibration, orthogonal polynomials, and rational approximations.

Target Disciplines:Mechanical EngineeringElectrical EngineeringAcousticsSensor CalibrationApplied Mathematics

Common Fitting Challenges in Engineering & Signal Analysis

  • Runge phenomenon and numerical instability in high-degree polynomial fitting
  • Accurately capturing phase angle and damping ratio simultaneously in transient decay
  • Singularities and pole identification in rational transfer functions

AltaiPlot High-Performance Fitting Engine

  • Stable orthogonal polynomial evaluation up to degree 9 with zero numerical overflow
  • Interactive damped sine and envelope fitting on multi-million point oscillograms
  • GPU-accelerated level-of-detail rendering for high-frequency vibration datasets

Engineering & Signal Analysis Models (1)

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engineering-math5 params

Damped Sine Wave (Harmonic Oscillator)

Exponentially decaying sinusoidal oscillation model for transient mechanical vibration and RLC circuit responses.

$y(t) = y_0 + A \exp(-\gamma t) \sin(\omega t + \phi)$