nicdbattery: Accelerated test of spacecraft battery cell data

In Auburngrads/SMRD: Statistical Methods For Reliability Data

Description

Brown and Mains (1979) present the results of an extensive experiment to evaluate the long-term performance of rechargable nickel-cadmium battery cells that were to be used in spacecraft. The study used 8 experimental factors. The first five factors are environmental or accelerating factors (set to higher than usual levels to obtain failure information more quickly). The other three factors were product-design factors that could be adjusted in the product design to optimize performance and reliability of the batteries to be manufactured. The experiment ran 82 batteries, each containing 5 individual cells. Each battery was tested at a combination of factor levels determined according to a central composite experimental plan.

Format

A data.frame with 87 rows and 10 variables:

[, 1]	celsius	Temperature applied to the battery	Numeric
[, 2]	discharge_depth	Depth of discharge (as percent)	Numeric
[, 3]	discharge_time	Discharge time (in hours)	Numeric
[, 4]	charge	Charge time (in hours)	Numeric
[, 5]	recharge	Level of recharge	Numeric
[, 6]	koh_percent	Concentration of Potassium Hydroxide (as percent)	Numeric
[, 7]	koh_volume	Volume of Potassium Hydroxide (in cubic-centimeters)	Numeric
[, 8]	precharge	Precharge time (in hours)	Numeric
[, 9]	cycles	Accumulated cycles at event	Numeric
[,10]	event	Event observed at cycles (failure/right-censored)	Categoric

Source

Brown, H. M., and Mains D. E (1979) Accelerated Test Program for Sealed Nickel–Cadmium Spacecraft Batteries/Cells, Technical Report WQEC/C 79-145. Available from the Department of the Navy, Naval Weapons Support Center, Weapons Quality Engineering Center, Crane, IN 47522.

Auburngrads/SMRD documentation built on Sept. 14, 2020, 2:21 a.m.