Dynamics Modeling and Simulation for Moving-mass Reentry Vehicle
With respect to hypersonic re-entry vehicle, by applying the Newton-Euler's method, the six-degrees of freedom(6-DOF) dynamical equations of moving mass for a re-entry vehicle are derived and the control mechanism is analyzed according to the dynamical equations. Under the environment of Matlab, the 6-DOF trajectory simulation is presented based on the dynamical equations considering the earth's rotation and non-spherosomes factors, the cross-range and down-range of the impact point cause by lateral movement of the moving masses are computed by simulation and the results validate the feasibility of moving mass control.
Sliding Variable Structure Control for Attitude of Moving-Mass Hypersonic Vehicles
The moving-mass hypersonic attitude dynamic model is a strong nonlinear, multivariable, and strong coupling system. Based on the reasonable assumption, a simplified dynamic model is given. According to the time-scale separation theory, a sliding variable structure controller is designed and implemented for the tracking control of angular velocity and angle at the same time. Simulation results demonstrate the effectiveness of controller.
Software Tools for Nonlinear Missile Autopilot Design
A computer-aided design software package for nonlinear control synthesis is discussed. The software incorporates five different modern nonlinear control methods. The versatility of the software lies in its ability to develop nonlinear controllers using a simulation model. As a result, models of arbitrary complexity can be used in the control law development. The use of the design software is illustrated through the design of nonlinear regulators for a longitudinal missile model.