Boots – shoes – and leggings
Patent
1995-06-23
1997-07-22
Ruggiero, Joseph
Boots, shoes, and leggings
364152, G05B 1302
Patent
active
056509278
ABSTRACT:
A control method for stabilizing systems or devices that are outside the control domain of a linear controller is provided. When applied to nonlinear systems, the effectiveness of this method depends upon the size of the domain of stability that is produced for the stabilized equilibrium. If this domain is small compared to the accuracy of measurements or the size of disturbances within the system, then the linear controller is likely to fail within a short period. Failure of the system or device can be catastrophic: the system or device can wander far from the desired equilibrium. The method of the invention presents a general procedure to recapture the stability of a linear controller, when the trajectory of a system or device leaves its region of stability. By using a hybrid strategy based upon discrete switching events within the state space of the system or device, the system or device will return from a much larger domain to the region of stability utilized by the linear controller. The control procedure is robust and remains effective under large classes of perturbations of a given underlying system or device.
REFERENCES:
patent: 4257093 (1981-03-01), Peirson et al.
patent: 4545008 (1985-10-01), Sominin et al.
patent: 5179513 (1993-01-01), Breckner
Cornell Research Foundation Inc.
Ruggiero Joseph
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