68 results about "Adaptive feedback control" patented technology

An adaptive feed-back controlled system for regulating a physiological function of a heart in which a hemodynamic sensor continuously monitors the physiological performance of the heart. Three implanted electrodes sense and pace the right atrial, right ventricle and left ventricle. A learning neural network module receives and processes information for the electrodes (18) and sensors (22), and is controlled by a deterministic module for limiting said learning module. A pulse generator (16), is also controlled by the deterministic module, and stimulates both the heart and the vagus (20).

The invention relates to a distributed control method capable of improving the control precision of a flexible spacecraft and belongs to the flexible spacecraft control field. The method includes the following steps that: an execution mechanism and a sensor are installed at the same site of each of n arbitrary positions on the flexible spacecraft, and a dynamic model is established and is linearized, so that a linear time-invariant dynamic equation and a kinematics equation of a system can be obtained and are adopted as a controller design model; and an elastic rotation angle velocity and CMGs frame angle feedback control law is designed based on the Lyapunov theory, or the Lyapunov theory and direct adaptive control are combined together so as to design a desired reference model and a direct adaptive feedback control law. According to the distributed control method of the invention adopted, the vibration suppression of the flexible spacecraft can be realized based on the execution mechanisms which are installed in a distributed manner, and therefore, the vibration of the system can be converted into a stable state from a divergence state, and the control precision of the flexible spacecraft can be improved; and the estimation of the parameters of the system is not required in direct adaptive controller design, and high robustness can be realized, and therefore, the control precision of the flexible spacecraft can be further improved.

A method and system is described that adaptively adjusts an eService management system by using feedback control. Behavior experts are distributed at different levels of the hierarchy of the eService management system. Within the hierarchy, feed-forward reasoning is performed from lower level behavior experts to the higher level behavior experts. A method for identifying bottlenecks is described and utilized. The performance of these behavior experts is compared with various objective functions. The discrepancies are used to adjust the system.

A HCCI engine with a model reference adaptive feedback control system maintains stable HCCI combustion during speed / load transitions by: (1) estimating the maximum rate of pressure rise (MRPR), for each cycle, from an extra-cylinder sensor metric, such as a crankshaft dynamics or knock sensor metric, via statistical vector-to-vector correlation; (2) periodically self-tuning the vector-to-vector correlation; (3) applying knowledge base models to guide cycle-to-cycle adjustments of fuel quantity and other engine parameters, to maintain a target MRPR value.

A fabrication process produces markers for a magnetomechanical electronic article surveillance system. The marker includes a magneto-mechanical element comprising one or more resonator strips of magnetostrictive amorphous metal alloy; a housing having a cavity sized and shaped to accommodate the resonator strips for free mechanical vibration therewithin; and a bias magnet to magnetically bias the magnetomechanical element. The process employs adaptive control of the cut length of the resonator strips, correction of the length being based on the deviation of the actual marker resonant frequency from a preselected, target marker frequency. Use of adaptive, feedback control advantageously results in a much tighter distribution of actual resonant frequencies. Also provided is a web-fed press for continuously producing such markers with adaptive control of the resonator strip length.

A fabrication process produces markers for a magnetomechanical electronic article surveillance system. The marker includes a magnetomechanical element comprising one or more resonator strips of magnetostrictive amorphous metal alloy; a housing having a cavity sized and shaped to accommodate the resonator strips for free mechanical vibration therewithin; and a non-deactivatable bias magnet adapted to magnetically bias the magnetomechanical element. The process employs adaptive control of the cut length of the resonator strips, correction of the length being based on deviation of the actual marker resonant frequency from a preselected, target marker frequency. Use of adaptive, feedback control advantageously results in a much tighter distribution of actual resonant frequencies. Also provided is a web-fed press for continuously producing such markers with adaptive control of the resonator strip length.

The invention discloses an online self-adaptive laser peening sizing method and a device for a welded integral panel. According to the technical scheme of the invention, the dimensions, sizing amount and material dynamic characteristics of the welded integral panel are online measured by virtue of optical online measurement equipment and a computer artificial intelligence technology, and setting and optimization for the parameters of a laser peening process are realized through expert system real-time data transmission and self-adaptive feedback control, thus automatic, digital and intelligent precise sizing for the welded integral panel is completed.

A computer-implemented method is used to correct deviations between a predicted gas excess air ratio and a calculated excess air ratio in a dual fuel engine or other gas fueled compression ignition engine. The method includes determining gas excess air ratio for the engine based at least in part on at least one detected current operating parameter and calculating a predicted exhaust gas oxygen concentration engine based on the predicted gas excess air ratio. A time based filtered predicted exhaust gas oxygen concentration value may then be calculated and compared to a time-based filtered measured exhaust gas oxygen concentration value. The resultant oxygen concentration deviation value may be used to generate a corrected predicted gas excess air ratio.