Guidance Scheme for Glide Range Maximization of a Hypersonic Vehicle

Entry guidance with real-time planning of reference based on analytical solutions

“…Therefore, the guidance can deal with various urgent tasks. (4) In Section 5.2.5, we extend the scheme for suppressing trajectory oscillations proposed in Yu and Chen (2011) to a three dimensional scheme, which can effectively suppress the trajectory oscillation while not interfering with the work of the entry guidance. (5) In Section 5.3, we propose a guidance scheme for the AAP by innovatively combining PN and a reference tracking law.…”

“…27 shows that EGAS can effectively suppress the oscillations caused by the bank reversals. The PCGG also uses the method presented in Yu and Chen (2011) for suppressing the trajectory oscillation, but the c plan formula is simplified by neglecting the effect of the Earth curvature. This reduces the accuracy of c plan .…”

“…10, if a plan and r plan are directly used as the commands, the entry trajectory will have a weakly-damped phugoid oscillation. In Yu and Chen (2011), a guidance scheme was proposed for suppressing the oscillation by adjusting the AOA. The simulation results demonstrated the good performance of this scheme.…”

“…Later, Zimmerman et al (2003) proposed a predictor-corrector entry guidance that satisfies the heating rate constraint by breaking the entry trajectory into two parts. Additionally, Yu and Chen proposed a guidance scheme that can effectively suppresses the trajectory oscillations (Yu and Chen, 2011). Lu et al (2013) simplified the scheme by neglecting the effects of the Earth curvature and then applied it to adaptive predictor-corrector entry guidance.…”

“…Such a scheme avoids the repeated simulations of the whole trajectory and thus significantly reduces the computational load. Since the CAV trajectory has a weakly-damped phugoid oscillation, we extend the scheme used for suppressing the oscillation, presented in Yu and Chen (2011), to a 3-Dimensional (3-D) scheme and then apply it to the entry guidance. Because no offline planning is needed for specific mission, the entry guidance can handle various urgent tasks and deal well with large aerodynamic and atmospheric dispersions.…”