Considering Terrain Contour MatchingSystem Requirements in the TF/TA Based Constraint Optimal Trajectory Design for UAVs

In this paper, the problem of the Terrain Contour Matching systemrequirement effect in the constraint optimal trajectory planning of the unmanned aerial vehicles that are require to fly at low altitude over the terrain has been discussed. According to using this system in some of vehicles as a navigation aiding system,it is more efficient in rough terrain and given that the optimal path planning methods have generally attempted to cross the paved areas, with this contradiction, providing the requirements of this system is a complex task. In this paper, it's tried to meet the system requirementsin the constraint optimal trajectory design process. For this purpose, by developing an algorithm based on the layered network flow and applying dynamic equations of motion on digital terrain elevation data in the three-dimensional space with the discrete dynamical constraints and a cost function, a complete model of parameters affecting the system has been fulfilled. The resulting algorithm,by applying the initial conditions and in the least possible time,produces a constraint optimal trajectory in such a way that the requirements of the systemare satisfied. Numerical results of simulation show validity of this issue.