CABIN PRESSURE CONTROL SYSTEM USING ALL-ELECTRIC CONTROL WITHOUT OUTFLOW VALVE POSITION FEEDBACK

摘要

A pressure control system (100) including an inflow unit (104) for admitting pressurized air into a cabin (102), an outflow unit (112) including a motor (308, 320) for operating a valve to discharge air from the cabin (102) at a predetermined rate based on a motor control signal that sets the motor speed, a control unit (110), and an air pressure sensor within the cabin (102) for determining a pressure signal. The control unit (110) receives the pressure signal and computes a pressure rate of change error signal to set the motor control signal. The outflow unit (112), control unit (110), and air pressure sensor from a feedback control loop independent of motor speed, valve speed, or valve position feedback.