专利汇可以提供Dead reckoning back-up navigational system for a drone专利检索,专利查询,专利分析的服务。并且The heading and range to a recovery area for a drone on a mission are continuously monitored and stored on board the drone. Any failure in the primary navigational system in the drone is detected and the stored heading and stored range are available for comparison with the on-board compass reading of the drone and an on-board air speed integrator for the drone. Any deviation between the drone compass reading and the stored heading is corrected by generation of an error signal to operate the flight controls of the auto-pilot on the drone to steer the drone towards the recovery area. A landing command signal, in turn, is provided only when the integrated air speed equals the stored range. Corrections for wind conditions are automatically included in the stored heading and range information so that accurate dead reckoning back to the recovery area is realizable. A wholly selfcontained means is thus provided for returning a drone to a specified recovery area in the event of failure of its primary navigational system at any point in time during its mission.,下面是Dead reckoning back-up navigational system for a drone专利的具体信息内容。
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