Guidance and Control of Longitudinal/Lateral Trajectory for Atmosphere Re-entry Space Vehicle Using Feedback Linearization Control Law

Several advanced countries have researched on guidance and control of atmosphere reentry. However, the scheme to obtain control law of bank angle from linearized differential equation as in space shuttle is complicated to calculate a gain and needed to adjust a control law when reference trajectory is changed. From these point of view, this scheme has shortcoming of much effort and time. In this paper, we apply the feedback linearization law, one of nonlinear control methods, to guidance and control for the model Hope-X. This paper proposes initial condition constraint considering a dynamic performance of space vehicle compared with other researchers for more accurate flight permissible boundary and shows the performance of the proposed trajectory control and verifies the importance of lateral trajectory control. The lateral error means azimuth error.