TAILIEUCHUNG - MiG-21 modeling and simulation

This work provides MiG-21 modeling as an unmanned aerial vehicle by the full nonlinear equations of motion: Force Equations and Moment Equation; Kinematic equations and Navigation equations. By this model, the responses of UAV to different control effects are surveyed in simulation, which evaluates the UAV's ability to control when it performs complex motions. | Research MIG-21 MODELING AND SIMULATION Le Ngoc Lan1 Nguyen Vu2 Hoang Minh Dac1 Pham Thi Phuong Anh1 Le Thanh Ngoc3 Abstract This work provides MiG-21 modeling as an unmanned aerial vehicle by the full nonlinear equations of motion Force Equations and Moment Equation Kinematic equations and Navigation equations. By this model the responses of UAV to different control effects are surveyed in simulation which evaluates the UAV s ability to control when it performs complex motions. This is the basic background for the synthesis of UAV-MiG-21 control systems to follow complex orbits. Keywords Nonlinear equations of motion Simulation in simulink Modeling of MiG-21. NOMENCLATURE Fi Ol Xi y z Fb Ob Xb yb Zb Fs Os XS ys Zs Fw Ow Xw yw Zw ộ Ỡ V p q r u v w Y X a p p S b c Inertia reference frame Body-fixed frame Stability frame Wind frame Roll Pitch Yaw angles Roll Pitch Yaw rates Body frame velocity of aircraft in the x y z-body directions Flight path angle Flight path heading angle Angle of Attack AOA Side-slip angle or Angle of Side-slip AOS Air density Wing area total Wing span Wing chord Cx Cy Cz CD CY CL Drag Side and Lift force aerodynamic coefficients Cl Cm Cn X Y Z axis aerodynamic moment coefficients NED North East and Down components of n frame vector 1. INTRODUCTION Dynamic modeling is an important step in the development and the control of a system as UAV or autonomous aircraft. In fact the model allows the designers to analyze the system possibilities and its behavior under various conditions. Especially for UAV it is highly appreciable to have a closed to real model for simulation and controller tuning before implementing. For describing the motion of unmanned aerial vehicles the usual model of lateral motion longitudinal motion and stabilization of bank angle are used 8 9 . They are linear models with approximate parameters defined in the standard conditions. However in case of complex maneuvers they cannot be separated into independent motions the .

• Kĩ thuật Viễn thông
• Nonlinear equations of motion
• Simulation in simulink
• Modeling of MiG 21
• Kinematic equations
• Navigation equations
• UAVs ability