SU17 Adds RTK Positioning for More Confident Outdoor Missions
With the widespread application of UAVs in surveying, mapping, inspection, agricultural spraying and other fields, higher requirements have been put forward for flight stability and localization accuracy. By integrating multiple localization methods, SU17 UAV can switch localization methods for different scenarios to meet high-precision requirements in complex environments.
What localization methods does SU17 integrate?
SU17 UAV is now integrated Visual localization (indoor environment), GPS navigation (outdoor localization), optical flow sensing (low-altitude stability) and radar perception (environment modeling) Four major localization modules. In order to further improve the operation accuracy in complex scenarios, a new RTK high-precision localization system, through real-time differential correction of the base station, the all-terrain centimeter-level route tracking capability is achieved, adapting to the needs of high-precision industrial-level tasks such as surveying, mapping, and inspections.
Comparison of different localization methods
SU17-RTKlocalization implementation principle
Base station side: The ground RTK base station collects raw satellite observation data in real time, calculates position errors (ionospheric delay, clock error, etc.), and generates differential correction data;
Data transfer: The correction data is forwarded to the UAV airborne terminal through the low-latency LQ link to ensure communication stability and anti-interference capabilities;
Onboard forwarding: The airborne terminal serves as a relay node and seamlessly forwards the correction data to the UAVRTK mobile terminal;
Real-time solution: The RTK mobile terminal integrates its own satellite signals and correction data, solves them through carrier phase difference technology, and outputs centimeter-level localization results (horizontal accuracy 1-3cm);
Flight controls: The flight controller system dynamically corrects the flight path based on RTK localization information, significantly suppressing GPS drift and improving route tracking stability in complex environments (building groups, high-voltage lines). The plan passed
LQ link: Low-latency transfer, taking into account long-distance communication reliability and real-time localization, suitable for scenarios requiring millimeter-level localization such as surveying and mapping inspections, precision agriculture, etc.
SU17-RTKlocalization flight test
We tested in a windless and spacious outdoor environment, used su17UAVRTK localization to conduct hover tests and return tests, and analyzed the range of UAV local position changes.
Hover test
Under rtklocalization, unlock the UAV and fly to a height of 3.7m for hovering. Intercept a section of the hover log for analysis, as shown below: We observe the UAV local position (vehicle_local_position/x,y,z,) and observe that the x/y/z axis fluctuation ranges are respectively ±0.15m/±0.15m/±0.03m。
Return test
After the UAV performs the return test, analyze the UAV starting position and return landing point, as shown in the figure below: We observe that the starting position x/y/z data are: 0.05/0.07/0.02; the position x/y/z data after return and landing are: 0.008/0.12/0.31; where the x-axis change size: 0.042m; y-axis change size: 0.005m; z-axis change 0.29m.
in conclusion
SU17 UAV hovers with horizontal accuracy under RTK localization ±0.15m, high stability ±0.03m;Return level deviation \<0.05m, significantly reducing localization drift and ensuring that UAVs can stably execute routes in high-precision tasks such as surveying, mapping, and inspections.
