Longitudinal Trim and Stability Analysis of Generic Air-Breathing Hypersonic Vehicle using Bifurcation Method

Abstract

The Air-breathing Hypersonic Vehicle (AHV) can meet the futuristic goals of rapid global travel, to Low-Earth Orbit and into space in near-term decades. This paper presents the study of the trim and stability characteristics of the 3DOF longitudinal model of the generic AHV. Longitudinal 3DOF AHV simulation is developed with the aerodynamic model for trim analysis considering the complete flight envelope for Mach number from M=0 to 24. Dynamic model simulation of the 3DOF AHV is performed for the trim conditions and stability of the AHV flight for the complete envelope. Bifurcation Analysis is implemented with the longitudinal 3DOF AHV model for trim analysis and stability for the complete AHV flight envelope.

Control design using PID with state feedback for Air-breathing Hypersonic Vehicle

“…Aerodynamics coefficient, and dynamics from [10], [11], are implemented to develop an aerodynamic model of total lift coefficient, drag coefficient, pitching moment coefficient, side force coefficient, rolling moment coefficient, yawing moment coefficient as C L , C D , C m , C Y , C l , and C n respectively, and is given using (13)(14)(15)(16)(17)(18) Here q , S, b, c is the dynamic pressure, reference area, span and mean aerodynamic chord respectively. The linear aerodynamic coefficient equations of the 6DOF dynamic simulation model of AHV are given by ( 13)- (18).…”

“…The proposed propulsion incorporates a theoretical ramjet and scramjet engine. The thrust engine model [10][11][12] is used over a wide variety of flight envelopes. Considering the 6DOF model, AHV engine dynamics using ( 19) is implemented with Mach number, height, and PLA (pilot-lever-angle), and a function with selected flight envelop of M=5.…”