| Abstract: | A multi-resonant wide band controller decomposes the wave energy
converter control problem into sub-problems; an independent
single-frequency controller is used for each sub-problem. Thus, each
sub-problem controller can be optimized independently. The feedback
control enables actual time-domain realization of multi-frequency complex
conjugate control. The feedback strategy requires only measurements of
the buoy position and velocity. No knowledge of excitation force, wave
measurements, nor wave prediction is needed. As an example, the feedback
signal processing can be carried out using Fast Fourier Transform with
Hanning windows and optimization of amplitudes and phases. Given that the
output signal is decomposed into individual frequencies, the
implementation of the control is very simple, yet generates energy
similar to the complex conjugate control. |