Sea Wave Filter Design for Cable-Height Control System of Anti-Submarine Helicopter
The paper aims to solve the radio altitude signal mixed with sea wave noise which should be filtered as the helicopter executing the antisubmarine task. The sea wave is modeled based on the rational spectral approach and obtained in the form of white noise shaping filter as the sea wave color noise is changed into white noise. For the measurement equation and state equation can be formed including the estimated value, the sea wave filter is brought out according to the continuous Kalman filtering theory and added to the altitude channel. Lastly, the cable-height control system has taken radio altitude and normal acceleration which have been filtered as feedback signals. The effects of the filter in different wind speeds are separately verified by the digital simulations, and the results show the design approach is available and effective.
KeywordsRadio altitude signal The sea wave Helicopter Kalman filtering theory
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