Abstract
A capsule-type vehicle is promising for the manned return vehicle from the Moon, Mars or from further bodies from the stand point of the weight budget regardless of its drawback of relatively low lift-to-drag (L/D) aerodynamic characteristics. The present paper describes the 6 degree of freedom (6DoF) simulation of the skip entry of the 4-ton class manned space return vehicle and discussed the issues related to the RCS bank control : the characteristics of the undesirable attitude motion due to leakage of the control force. Moreover, a fault tolerance algorithm based on extemded Kalman-filter (EKF) and the Sequential Monte Calro (SMC) has been introduced and applied to the state estimation in case that the roll rate signal and GPS signals are lost in the GPS/IMU integrated navigation system. The numerical simulation has showed that EKF+SMC fault tolerance algorithm successfully achieved state estimation of vehicle flight positioning by integrating IMU signal even under the condition that the roll rate and GPS signals are lost.
