UAV automatic height slow descent control method based on voyage and endurance performance

Abstract

The invention belongs to the technical field of flight control and relates to an UAV automatic height slow descent control method based on voyage and endurance performance. The method comprises the steps of (1) calculating a horizontal distance from a current position of an aircraft to a target point, (2) calculating a sinking rate required in completing the remaining portion of a current flight segment, and (3) calculating a desired sinking rate HDCLL1. According to the method, a mode of dynamically changing the minimum value of an expected descent rate in real time is designed, and the height descent control with a slow descent function for a UAV is achieved. According to a current state and mission planning of the UAV, an altitude descent rate control command is automatically and dynamically adjusted in real time, the slow descent of the UAV is achieved, thus the energy loss is reduced, the flight time and flight distance of a descent process are improved, and thus the voyage and endurance performance of the UAV are fully delivered.

Description

technical field [0001] The invention belongs to the technical field of flight control, and relates to an automatic altitude slow-down control method of an unmanned aerial vehicle based on flight time performance. Background technique [0002] During the flight of the UAV to the target point, the conventional practice is to first descend to the mission height of the target point with a safe maximum sink rate, and then maintain level flight until the aircraft passes the target point. However, when a certain type of long-endurance drone is descending, in order to ensure that it does not overspeed, the speedbrake will continue to open during the descent, and after reaching the target altitude, it is necessary to increase the throttle to maintain the level flight altitude, thus increasing the overall consumption. Fuel rate, and then have a greater adverse impact on flight time. In order to achieve lower-altitude flight with lower overall fuel consumption and improve the operatio...

AI Technical Summary

Problems solved by technology

However, when a certain type of long-endurance drone is descending, in order to ensure that it does not overspeed, the speedbrake will continue to open during the descent, and after reaching the target altitude, it is necessary to increase the throttle to maintain the level flight altitude, thus increasing the overall consumption. Fuel rate, and then have a greater adverse impact on flight time

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