Precise fixed-point delivery method and system for unmanned aerial vehicle material delivery cabinet

The invention discloses a precise fixed-point delivery method and system for an unmanned aerial vehicle material delivery cabinet, and relates to the technical field of unmanned aerial vehicle positioning. An obstacle avoidance track is generated by acquiring the initial position of the unmanned aerial vehicle and combining a digital elevation model; when the distance from the target material putting cabinet to the target material putting cabinet is smaller than a first threshold value, the memory alloy anti-deformation target and the CNN neural network are used for resolving a pose error; when the distance from the target material putting cabinet to the target material putting cabinet is smaller than a second distance threshold value, laser gradient detection, RTK residual errors and wind disturbance offset are fused, and a four-dimensional calibration matrix is generated through Kalman filtering; when the distance from the target material putting cabinet to the target material putting cabinet is smaller than a third threshold value, the three-axis holder is driven to execute dynamic compensation, and positioning errors, cabinet body inclination angles and wind disturbance trigger release are synchronously verified; after landing, closed-loop verification is realized through pressure sensing; according to the invention, the delivery bottleneck in a complex environment is broken through, the delivery precision and reliability are significantly improved, and the system has terrain adaptive leveling, dual-mode all-weather identification and multi-stage safety protection capabilities.