Excellent control, minimal error from setpoint, of a boiler unit has always been an elusive goal. Adap tive Control System was applied to steam temperature control of utility boilers. In the control system, the adaptive control strategy is embedded on the DCS controllers in parallel with each conventional
It has been reported that the dynamic recovery of drain current (b) will take place soon after the stress applied on gate is removed during a Negative Bias Temperature Instability (NBTI) experiment of MOSFETs. This phenomenon makes it very difficult to correctly estimate NBTI degradation of Id (AId). This work presents a new characterization method in which the effect of the dynamic recovery is quantitatively taken into account to precisely estimate AId.
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