Wave generation and absorption using force-feedback control

This thesis concerns absorbing wave machines where the absorption strategy is based on a force-feedback approach. A theoretical model, describing their behaviour correct up to second order, is developed. At first order, this model seeks to provide a theoretical transfer function, linking the demand signal to the amplitude of the desired progressive wave. In the context of force-controlled wave machines, this transfer function may be regarded as the equivalent to the well known Biesel coefficients; the latter linking the demand signal and the progressive wave mode for position-controlled machines.