ABSTRACT
This chapter discusses active control of response in discrete parameter adaptive structures for the dynamic case. The human body is a very good example of adaptive structures. The resistance an actuator sees in inducing a required element deformation is the main cause of its energy demand. The resistance comes from the presence of preexisting element forces s0, and the stiffness of the structure in directions associated with the induced element deformations. The resistance to insertion of actuator induced element deformations in a statically indeterminate structure may be much larger than the one in a statically determinate structure. To see this, one has to express the element forces by the force method. In the feedback control of autonomous motion of nodes in state space, one has to select a control law in order to define controls in real time as a function of observed state.
