Adaptive feedforward laboratory controller with proportional/integral calculation

摘要: The apparatus may be implemented in software which performs the following steps: calculating a desired air velocity exhaust duct from first input signal representative of size variable sash opening and user defined setpoint face velocity; comparing successive values to determine any absolute percent change therebetween; reset deadband value; producing output signals, responsive second measured step, for fan so as force toward velocity. production is accomplished by adaptive, feedforward techniques when greater than proportional/integral less deadband. A timer provided lockout signals produced employing predetermined period time after an techniques.