Airspeed prediction filter

摘要

The airspeed display method includes the steps of measuring the airspeed of the aircraft and generating a data stream indicative of measured airspeed. The data stream is used to control a cockpit display of airspeed, where a delay occurs between measurement and cockpit display of the airspeed. A correction factor is calculated which indicates a predicted change in the airspeed of the aircraft during the delay. The correction factor is combined with the data stream of measured airspeed to obtain a signal of the predicted airspeed of the aircraft at the time of the display. The combined signal is used to display the predicted airspeed to the pilot. The data stream indicative of measured airspeed is filtered with a second order infinite response filter prior to combining the data stream with the correction factor.