configurations are investigated. Suboptimal trajectories are derived for systems that are not
in canonical form. Systems in which it takes more than one level of bracketing to achieve
controllability are considered. The trajectories use sinusoids at integrally related frequencies
to achieve motion at a given bracketing level. A class of systems that can be steered using
sinusoids (claimed systems) is defined. Conditions under which a class of two-input systems …