Patent ID: 6544114
Filing Date: 2003-04-08
Classification: B64D

Abstract:
A system for controlling an air mass flow inside an aircraft fuselage in response to a current flight altitude, said system comprising a controllable air mass flow distribution network including air flow conduits (7, 7â€², 9, 71, 71â€²), at least one air outlet (9â€²) connected to one of said air flow conduits, at least one controllable air flow control element (8, 51, 52, 53) connected to said air flow conduits for moving air through said air mass flow distribution network to said at least one air outlet (9â€²), a closed loop control unit (1) including a memory (2) for storing rated, first data representing at least one rated performance characteristic of said at least one controllable air flow control element in said air mass flow distribution network, a first group of network related sensors (5, 9â€³, 51â€², 52â€², 53â€², 71â€²), a second group of aircraft related sensors (11, 12), said first and second group of sensors including pressure sensors, temperature sensors, performance sensors including air flow volume sensors, and at least one altitude sensor, said first group of sensors being positioned for sensing actual second data representing any one of actual performance characteristics, actual pressure, and actual temperature of said air mass flow distribution network, said second group of sensors being positioned for sensing actual third data representing any one of actual altitude, temperature and pressure data of said aircraft fuselage, said closed loop control unit (1) further comprising a corrector (32) having a first input connected to said memory (2) for receiving said rated first data and a second input connected to said second group of sensors (11, 12) to receive said actual third data for calculating parameter corrected data, said closed loop control unit (1) further including a comparator (31) having a first input connected to an output of said corrector (32) for receiving said parameter corrected data from said corrector (32), said comparator (31) having a second input connected to said first group of sensors for receiving said actual second data, said comparator (31) comprising an output (3) connected to said at least one controllable air flow control element of said air mass flow distribution network for controlling said air mass flow through said at least one controllable air flow control element.