Abstract A diffractive sail is a solar whose exposed surface covered by an advanced metamaterial film with engineered optical properties. This study examines the optimal performance of Sun-facing attitude in typical orbit-to-orbit heliocentric transfer. attitude, which can be passively maintained through suitable design shape, obtained when nominal plane perpendicular to Sun–spacecraft line. Un...

This paper presents biped walking control using a library of optimal trajectories. The biped walking control problem is formulated as an optimal control problem. We take advantage of a parametric trajectory optimization method to find the periodic steady-state trajectory in regular walking. Then we use Differential Dynamic Programming (DDP) to generate a library of optimal trajectories and loca...

In this paper, finding Dynamic Load Carrying Capacity (DLCC) of flexible link manipulators in point to-point motion was formulated as an optimal control problem. The finite element method was employed for modelling and deriving the dynamic equations of the system. The study employed indirect solution of optimal control for system motion planning. Due to offline nature of the method, many diffic...