A Composite Hierarchical Adaptive Filter for Multi-source Interference Systems

Abstract

The invention relates to a composite layered adaptive filter for a multi-source disturbance system. The multi-source disturbance is composed of external system output variables, parameter uncertainty and norm-bounded noises. Firstly, for the disturbance described by the external system output variables, a disturbance model is established based on the known information. Furthermore, a disturbance observer is designed to estimate and cancel the disturbance. Secondly, for the parameter uncertainty, an adaptive update rule is designed to estimate uncertain parameters. Furthermore, the input items of a filter are constructed for compensation. Thirdly, through the H-infinity performance optimization, norm-bounded noises generated in estimation error and in the model during the above two steps are further inhibited. Finally, in combination with the disturbance observer, adaptive input compensation items and the result of the H-infinity performance optimization, a composite layered filter is constructed. The filter is fine and anti-disturbance. Compared with a conventional kalman filter and an H-infinity filter, the above filter is higher in precision and wider in application range, and can be applied to the navigation system of vehicles, ships and aircrafts.

Description

technical field [0001] The invention relates to a composite layered adaptive filter for a multi-source interference system. Aiming at the multi-source interference suffered by the filter system, the idea of ​​composite layered anti-interference is adopted, which is different from the traditional Kalman filter or H ∞ Compared with the filter, the filter accuracy is improved, and the scope of application of the filter is expanded, which can be applied to the integrated navigation and situation awareness system of vehicles, ships and aircrafts. Background technique [0002] In recent years, with the development trend of high-precision and high-reliability aircraft, the demand for aviation missions has higher and higher requirements for attitude measurement and control accuracy, and the navigation system is required to have the ability to offset and suppress interference from different channels, different sources, and different levels. , the traditional combined navigation filte...

AI Technical Summary

Problems solved by technology

[0004] The technical problem of the present invention is: aiming at the multi-source interference and parameter uncertainty existing in the filtering system, overcoming the deficiencies of the prior art, providing a composite layered adaptive filtering method for the multi-source interference system, and solving the multi-source interference System interference cancellation and interference suppression problems, improve the system's anti-interference ability and filtering accuracy

Images