Fluid-pressure and analogous brake systems – Speed-controlled – Torque sensing
Reexamination Certificate
2011-05-10
2011-05-10
Schwartz, Christopher P (Department: 3657)
Fluid-pressure and analogous brake systems
Speed-controlled
Torque sensing
C303S126000
Reexamination Certificate
active
07938494
ABSTRACT:
Improved anti-lock brake systems (ABS) employed on aircraft and land vehicles and methods of operating same employing a sliding mode observer (SMO) incorporated into an ABS algorithm requiring only measurement of wheel speed to regulate the application of braking torque are disclosed. Braking is optimized simply by maintaining an SMO estimate of differential wheel torque (road/tire torque minus applied brake torque) derived from wheel speed at an extremum via applying or releasing the brakes as the extremum is passed through.
REFERENCES:
patent: 4336592 (1982-06-01), Beck
patent: 4412291 (1983-10-01), Amberg et al.
patent: 4679866 (1987-07-01), van Zanten et al.
patent: 4715662 (1987-12-01), van Zanten et al.
patent: 4828334 (1989-05-01), Salman
patent: 4940295 (1990-07-01), Adachi et al.
patent: 4946015 (1990-08-01), Browalski et al.
patent: 5291408 (1994-03-01), Thatcher
patent: 5409302 (1995-04-01), Chabbert
patent: 5515279 (1996-05-01), Hrovat et al.
patent: 5549371 (1996-08-01), Konaga et al.
patent: 5564796 (1996-10-01), Saito et al.
patent: 5918951 (1999-07-01), Rudd, III
patent: 5951122 (1999-09-01), Murphy
patent: 6104148 (2000-08-01), Kumar et al.
patent: 6122585 (2000-09-01), Ono et al.
patent: 6122588 (2000-09-01), Shehan et al.
patent: 6266600 (2001-07-01), Miyazaki
patent: 6270172 (2001-08-01), Shirai et al.
patent: 6293632 (2001-09-01), Grote et al.
patent: 6412886 (2002-07-01), Abe et al.
patent: 6684147 (2004-01-01), Park et al.
patent: 6890041 (2005-05-01), Ribbens et al.
patent: 7013208 (2006-03-01), Park et al.
patent: 7035725 (2006-04-01), Park et al.
patent: 2003/0052536 (2003-03-01), Schneider et al.
patent: 2003/0151302 (2003-08-01), Anwar
Mark L. Akey, “Development of fuzzy logic, ABS control for commercial trucks”, Magnavox Decision Support Systems Applied Center of Excellence, Fort Wayne in SPIE vol. 2493 Mar. 1995, pp. 359-370.
Cem Unsal et al., “Sliding Mode Measurement Feedback Control for Antilock Braking Systems” (IEEE Transactions on Control Theory, Mar. 1999, vol. 7, pp. 271-281).
John A. Tanner et al, “Dynamics of Aircraft Antiskid Braking Systems”, NASA Technical Paper 1959, 95 pages, Feb. 1982.
Fredricks Ronald J.
Ribbens William B.
Breimayer Joseph F
Schwartz Christopher P
LandOfFree
Antilock braking systems and methods does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Antilock braking systems and methods, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Antilock braking systems and methods will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2705094