Data processing: generic control systems or specific application – Generic control system – apparatus or process – Optimization or adaptive control
Reexamination Certificate
2005-08-30
2008-11-18
Cabrera, Zoila E (Department: 2123)
Data processing: generic control systems or specific application
Generic control system, apparatus or process
Optimization or adaptive control
C454S074000
Reexamination Certificate
active
07454254
ABSTRACT:
A cabin pressure control system and method that reduces or inhibits gear train backlash and the concomitant cabin pressure oscillations associated therewith. The cabin pressure control system includes a variable proportional-integral (PI) controller that implements a proportional function with a variable gain term and an integrator function with variable saturation limit. The proportional function gain term is increased, and the integrator saturation limits are decreased, at relatively low cabin error rate magnitudes. Increasing the proportional function gain term at relatively low cabin error rate magnitudes offsets potential backlash effects from the gear train. Decreasing the integrator saturation limits at relatively low cabin rate error magnitudes reduces potentially excessive integrator wind-up levels, which reduces the likelihood of producing limit-cycling and the potential for cabin pressure oscillations.
REFERENCES:
patent: 3939328 (1976-02-01), Davis
patent: 4553474 (1985-11-01), Wong et al.
patent: 4702128 (1987-10-01), Oshiage
patent: 4881160 (1989-11-01), Sakai et al.
patent: 4999557 (1991-03-01), Inoue
patent: 5119304 (1992-06-01), Seki
patent: 5155991 (1992-10-01), Bruun
patent: 5186681 (1993-02-01), Emmons
patent: 5270916 (1993-12-01), Sexton et al.
patent: 5297987 (1994-03-01), Emmons et al.
patent: 5520578 (1996-05-01), Bloch et al.
patent: 5598077 (1997-01-01), Matsubara et al.
patent: 5691616 (1997-11-01), Iwashita
patent: 5915401 (1999-06-01), Menard et al.
patent: 6424873 (2002-07-01), Przybylski
patent: 6445980 (2002-09-01), Vyers
patent: 6650078 (2003-11-01), Chaffee
patent: 6676504 (2004-01-01), Petri et al.
patent: 6746322 (2004-06-01), Scheerer et al.
patent: 6836091 (2004-12-01), Fujita et al.
patent: 7101277 (2006-09-01), Horner et al.
Cabrera Zoila E
Caglar Esq. Oral
Honeywell International , Inc.
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