| 摘要 |
An adaptive control device (77) and method (102-108) for control of the operation of an actuator (72), and particularly thermally-powered actuator (72) of the type used in a variable-air-volume diffuser (71). The preferred adaptive control device is an expert system circuit which controls a heater (74) provided on a thermally-powered actuator (72) to implement an adaptive process (102-108) in which a sensed variable, such as room air temperature, is driven toward a target temperature control range. Most preferably, the proce ss steps (106) include driving the room air temperature toward a gross (broader ) temperature control range by moving a diffuser damper assembly (80) to a substantially fully open or substantially fully closed position. Thereafter, and while inside the gross temperature control range, the process steps (107 , 108) include adjustments to the position of the damper assembly (80) are mad e only when a sensed parameter, preferably the supply air flow rate, is in a stable condition.
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