error band

(1) The band centered around the target time to failure, t_FT, within which the SWEAT algorithm will not permit the feedback control loop to adjust the forcing current, and whose boundaries (t_FT + B_E and t_FT - B_E) constitute the limits for the estimated time to failure, t_FE, where B_E is half the width of the error band.

(2) The criterion for convergence to the target test temperature. Convergence is defined as the point at which the difference between an extreme value of the calculated instantaneous temperature curve and the target test temperature (a) first reaches a value smaller than ε(T), where ε(T) is half the width of the error band, for a critically damped or overdamped system, or (b) remains less than ε(T) after a specified number of cycles, for an underdamped system.

References

JESD61#, 4/97