#$%^&*AU2008237552B220130502.pdf#####PID COEFFICIENT ADJUSTMENT FOR RESIPIRATORY HEATER CLOSED LOOP CONTROL Abstract of the Disclosure 100461 A heater system (16) is provided for a respiratory system (10) having a PID feedback control (100) in which the coefficients are adjusted, such as in a warmup process, to correspond to a likely flow rate of gas through a chamber (20) of heated water (27) based on the difference between heat input and heat output in relation to a temperature set point without the need to directly monitor flow rate or humidity level. A steady-state adjustment of the coefficients based on the behavior of the measured temperature in relation to the set point is also disclosed. - 26 -7 3/6 0 >； MwI ww 0cl, LLI
