초록 ▼

An adaptive control system implements a back-projection technique to limit adaptation of adaptive parameters in the system so that system actuators are not driven beyond desired physical limitations. When the optimal controller solution lies outside of a desired region in the parameter space, chosen

An adaptive control system implements a back-projection technique to limit adaptation of adaptive parameters in the system so that system actuators are not driven beyond desired physical limitations. When the optimal controller solution lies outside of a desired region in the parameter space, chosen in accordance with the physical limitations of the system, adaptation is back-projected onto or near a smooth convex surface defining the edge of the desired region. Adaptation is preferably normalized to improve adaptation convergence. Back-projection is preferably compensated in accordance with adaptation normalization to facilitate convergence. To lessen computational burdens, adaptation and/or back-projection is accomplished in accordance with a time-sharing technique in which orthogonal components are separately processed. The technique can be implemented in tonal control systems, and in systems capable of controlling non-periodic disturbances.

대표청구항 ▼

[ I claim:] [1.] An adaptive tonal control system having a system input and a system output, the adaptive tonal control system comprising:a plurality of actuators each receiving a correction signal and outputting a secondary input, the secondary input combining with the system input to yield the sys

[ I claim:] [1.] An adaptive tonal control system having a system input and a system output, the adaptive tonal control system comprising:a plurality of actuators each receiving a correction signal and outputting a secondary input, the secondary input combining with the system input to yield the system output;a plurality of error sensors sensing a system output, each error sensor generating an error signal; andan adaptive controller that outputs the correction signals, the controller includingan adaptive parameter bank that outputs a plurality of output signals in accordance with the adaptive parameters, the output signals being used to generate the correction signals;a parameter update generator that generates update signals in accordance with the error signals to adapt the adaptive parameters in the adaptive parameter bank; anda parameter back-projection element that directly limits adaptation of the adaptive parameters so that none of the correction signals drive the respective actuator beyond a constraint surface which is defined in the parameter space of the adaptive parameters.