Helicopter Flight Dynamics Modeling Using Simulink

In this paper, a mathematical model for conventional helicopter flight dynamics simulation based on the module of Simulink-Function is developed. The model does not need to call external programs or data, and can be directly compiled to form a dynamic link library, laying a foundation for the joint use of flight control systems of LABVIEW and other software. In the process of modeling, the main aerodynamic components of helicopter are considered comprehensively. Main rotor model is the key part of helicopter modeling, and the associated model of airfoil aerodynamics, inflow dynamics and blade flapping motion are all considered and discussed. Based on the modeling principle of modularity, the entire flight dynamics model is established in Simulink. The trim calculation and response analysis are carried out and compared with the helicopter flight data. The simulation results validate the rationality and accuracy of modeling methods. Finally, the simulation of an application of mission task is carried out to further verify the validity and usability of the model.