Coupled linear parameter varying and flatness-based approach for space re-entry vehicles guidance

Finite‐time trajectory tracking control for entry guidance

“…The state variables and aerodynamic forces acting on the vehicle are shown in Figure . As the angle of attack is assumed to be kept at the status of aerodynamic trim, the vehicle is controlled by bank angle σ modulation only . Due to physical limitation, the bank angle σ is required to operate in the range of [−90° 90°].…”

“…It can be easily observed from that longitudinal motion equations are decoupled with the lateral motion equations . For entry guidance law, bank angle modulation needs to be designed by taking into consideration the longitudinal motion profile firstly.…”

RBF neural network based second-order sliding mode guidance for Mars entry under uncertainties

“…Because the longitudinal equations defined in Eqs. (6)-(10) contain trigonometric functions, the equations for the design of the RNNSOSMG guidance are first transformed as follows [23] x 1 = r…”

A practical receding horizon control framework for path planning and control of autonomous vtol vehicles

“…However, due to the the mismatching between the mathematical model and the real quadrotor dynamics, the noises, and disturbances in the process, this kind of optimal control may result in a signi¦cantly degraded performance. Therefore, it is essential to design a corrective input term δu based on the gap between the optimal state x o and the actual system state x [17]. The feedback tracking controller is designed based on perturbation models around the optimal state x o and control u o .…”

“…There are many synthesis techniques for designing LPV controllers once an LPV model is known, such as gain scheduling control [18], H ∞ control [17], and model predictive control [19]. This paper uses a classic MPC technique introduced in [20] to achieve the regulation of the LPV system.…”