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How to compute cycles per year in Python using UliEngineering

You can easily compute the number of cycles per year using the UliEngineering Python library:

cycles_per_year.py
from UliEngineering.Reliability.Conversion import cycles_per_year

# Compute cycles per year for daily operation (365 days/year)
cycles = cycles_per_year("1/day")
print(f"Cycles per year (1/day): {cycles:.0f}")

# Compute cycles per year for hourly operation
cycles = cycles_per_year("1/hour")
print(f"Cycles per year (1/hour): {cycles:.0f}")

# Compute cycles per year for 10 cycles per day
cycles = cycles_per_year("10/day")
print(f"Cycles per year (10/day): {cycles:.0f}")

Example output

cycles_per_year_output.txt
Cycles per year (1/day): 365
Cycles per year (1/hour): 8760
Cycles per year (10/day): 3650

The cycles per year calculation determines the total number of operational cycles that occur in a year based on the cycle frequency. This is essential for reliability engineering, lifetime predictions, and maintenance planning. It converts cycle frequency (cycles per day, hour, etc.) to an annual figure, which is commonly used in reliability calculations like FIT (Failures In Time) and MTTF (Mean Time To Failure) predictions.

The cycles per year is computed by multiplying the cycle frequency by the appropriate time conversion factor: $N_{year} = f \times T_{year}$, where $f$ is the cycle frequency and $T_{year}$ is the number of time units in a year (365 days, 8760 hours, etc.). This conversion is fundamental for normalizing reliability data to a standard annual basis.

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