Flight Parameters Optimization Under Multi-waypoint Constraints Considering Environmental Impacts

The flight parameters optimization under the coordinated constraint of multi-waypoint is the key technology to realize fuel-saving and economic operation in Trajectory Based Operation.It requires the aircraft to meet the multi-waypoint constraint command issued by air traffic controller during the actual flight.Under the premise of safe flight,how to reduce the global temperature rise caused by engine emissions while achieving fuel-saving flight under the multi-constraint is a key issue of the civil aviation industry.In order to solve the above problems,the flight parameter optimization method in the approach process is studied.Firstly,based on the User Manual for the Base of Aircraft Data model and kinematics principle,the flight parameter calculation model is established.According to the influence of engine emissions on the greenhouse effect,the calculation method of global total temperature rise is studied.Then the research on the single-waypoint constraint is carried out.By analyzing the characteristics of the actual approach trajectory,the mathematical model of the approach process under this condition is constructed by using the infinitesimal method.And the influence of speed on flight parameters is analyzed.Control variable,constraints and fitness setting methods are studied.Based on Artificial Bee Colony(ABC)algorithm and Genetic Algorithm(GA),the flight parameter optimization model is constructed in this case,and the optimization algorithm is implemented by using MATLAB.The A330 aircraft is selected to validate and compare the two algorithms.Results show that both the algorithms can effectively solve the proposed problem.However,the optimization performance of GA is better.Different influencing factors of optimization results are tested and analyzed.Finally,optimization method under the single-waypoint constraint operation is extended to the multi-waypoint condition.By analyzing the characteristics of the approach trajectory under the multi-waypoint constraint,the mathematical model of the approach process under this situation is constructed.The influences of flight speed and flight altitude on objectives are analysed.The flight parameter solving model under this condition is constructed based on GA.The optimization model is programmed by MATLAB,and the optimization model is validated.The optimization results under different influencing factors are tested and analyzed.The proposed flight parameter optimization model can effectively optimize the flight parameters in different conditions,and the optimization accuracy is higher than 0.03%.Aircraft mass,fitness weight factors,constraint conditions and wind will affect the optimization results.The model can trade-off between fuel consumption and global temperature rise.The optimized flight parameters have a great significance for air traffic control in Trajectory Based Operation as well as airline economic green operation.