Master-slave engine bleed flow sharing control method and system
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United States of America Patent
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Aug 31, 2004
Grant Date -
Jul 22, 2004
app pub date -
Jan 22, 2003
filing date -
Jan 22, 2003
priority date (Note) -
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Abstract
A system and method for an engine bleed flow-sharing control system is disclosed. For a multi-engine bleed system, one (10) of the engines is selected as the master channel (15) such that the bleed air supply pressure of the control system receiving the bleed air is controlled (11, 12, 13) to achieve a desirable supply pressure range. To slave the other engine airflow control channels (25, 35, 45), the airflow rate (14) is also measured in the master channel (15) and the measured airflow rate is used as the airflow setpoint for other channels (25, 35, 45). The difference between the airflow setpoint and the airflow rate in the other channel is applied to control (21, 31, 41) the pressure or the valve/actuator opening area at the inlet of that channel (25, 35, 45).
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