torkperiod

Torkperiod is a term used in some branches of mechanical engineering and robotics to denote the duration of a complete cycle of torque variation on a rotating element. It is a neologism that blends the words torque and period and is not universally standardized, but it appears in niche literature and practice to describe torsional timing in rotating systems.

Definition and relation to other concepts

If a torque signal T(t) varies periodically, the torkperiod T_k is the time interval between successive corresponding points in the cycle, such as consecutive maxima or consecutive zero crossings of the same phase. For a pure sinusoidal torque T(t) = T0 sin(ω_t t), the torkperiod equals T_k = 2π/ω_t = 1/f_t, where f_t is the torsional frequency.

Measurement and calculation

Torkperiod is typically determined from torque measurements synchronized with angular position. A torque sensor and an angular encoder or rotary sensor are used to collect T(t) and θ(t). By identifying recurring features in the torque waveform (peaks, zero-crossings, or phase angles) and computing the time between them, one obtains T_k. In digital practice, spectral or autocorrelation methods may yield the dominant torsional period, especially in noisy signals.

Applications and context

Torkperiod is relevant in rotor dynamics, drive system design, and torque ripple analysis in electric motors and internal combustion engines. It aids in assessing dynamic loading, resonance avoidance, and control strategies. In non-periodic or multi-tone torque conditions, practitioners may report an average torkperiod or segment-based analyses rather than a single fixed value.

Notes

The term remains nonstandard; when possible, the related concepts of torsional period or torque ripple are used in formal documentation.