Three-dimensional trajectory optimization method for assisting high-energy-efficiency unmanned aerial vehicle of communication system

Abstract

The invention discloses a three-dimensional trajectory optimization method for assisting a high-energy-efficiency unmanned aerial vehicle of a communication system. The method is used for planning a three-dimensional trajectory of a single unmanned aerial vehicle for completing data collection or propagation of a communication node, so auxiliary communication efficiency of the unmanned aerial vehicle can be remarkably improved. When the three-dimensional trajectory of the unmanned aerial vehicle is optimized, kinetic equations of translation and rotation of the unmanned aerial vehicle are considered, so the optimized trajectory better conforms to the kinetic characteristics of the unmanned aerial vehicle; when the energy consumption model is modeled, the motion of the unmanned aerial vehicle is not limited too much, so the energy consumption model is suitable for energy consumption estimation of motion states such as two-dimensional plane motion, three-dimensional space motion and variable acceleration motion of the unmanned aerial vehicle; during optimization modeling, an optimized energy result directly reflects the electric energy consumption of the unmanned aerial vehicle, and compared with an existing method only considering effective energy, the method can consider conversion efficiency of converting the electric energy into the effective energy, so the optimization result can better reflect final energy consumption.

Description

technical field [0001] The invention relates to the technical field of power consumption of unmanned aerial vehicles, in particular to a three-dimensional trajectory optimization method of an unmanned aerial vehicle used for assisting the communication system with high energy efficiency. Background technique [0002] In the "Beyond 5G" or 6G era, the establishment and realization of a "air-space-land-sea" full-dimensional network architecture is a research hotspot in the field of communications. As an air carrier, UAV is expected to be one of the carriers of space-based networks. Since the UAV is bound by the limited airborne energy, improving the energy utilization efficiency of the UAV is one of the key technologies to improve the practical application possibility of the UAV-assisted communication. In this context, how to accurately evaluate the energy consumption of UAVs and how to save energy to the greatest extent in the completion of communication tasks by UAVs are im...

AI Technical Summary

Problems solved by technology

[0003] At present, in the application scenario of UAV as a dynamic air base station, the research on the energy model and three-dimensional scheduling of UAV-assisted communication is still insufficient.

[0004] In the literature "Energy-Efficient UAV Communication With Trajectory Optimization" and the literature "Energy Minimization for Wireless Communication With Rotary-Wing UAV", Y. Zeng et al. derived a fixed-wing unmanned aerial vehicle and a rotary-wing unmanned aerial vehicle based on the P=FV formula. However, it cannot be directly used to estimate the raw energy (such as fuel, electric energy) consumption of UAVs; secondly, their energy consumption model is derived based on the assumption that UAVs do planar motion, not Easy to extend to three-dimensional space motion

[0005] The literature "Optimal 3D-Trajectory Design and Resource Allocation for Solar-Powered UAV Communication Systems" Y.Sun et al. decomposed the energy consumption of the rotor UAV into the sum of the work done in the horizontal plane and the work done in the vertical direction, which was used to estimate the UAV in three dimensions. The movement of space consumes energy, but the power does not satisfy the principle of superposition, so the theoretical feasibility of this method is insufficient

Images