% System Concept Design and Performance Prediction
The concept developed here is a two-body system in which a floating surface buoy is driven by the waves and reacts against a submerged plate.  Energy is extracted by a power take-off device located between the surface buoy and submerged plate.  The system has been deployed in both a drifting mode and also anchored to the seafloor.


\section{Linear Analysis of System Heave Motions}
Although there are several non-linear forces behaviors in the system, it is still useful to perform a fully linearized analysis of the system to determine estimates of the expected behavior.  Full linearizion allows the analysis to be performed in the frequency domain and the effects of varying a wide range of system parameters can be quickly evaluated.  For this analysis the system shown in figure \ref{fig:DynamicAnalysisSchematics_A} is analyzed through the use of linear wave-theory, linear power take-off behaviors and linearization of viscous drag effects.  The size and weight parameters are shown in figure \ref{fig:SizeAndShape}

\begin{figure}
%\centering
\begin{minipage}{.47\textwidth}
\centering
\includegraphics[width = 1\linewidth]{Ill/DynamicAnalysisSchematics_A}
\caption{Schematic of wave-energy converter for linear analysis.  The power take-off device is represented by a linear spring-damper system with spring constant $k$ and damping coefficient $b$.}
\label{fig:DynamicAnalysisSchematics_A}
\end{minipage}
\hspace{.05\textwidth}
\begin{minipage}{.47\textwidth}

\underline{Buoy}
\begin{eqnarray*}
d = 2.5m \\
\bigtriangledown = 3.0 m^3
\end{eqnarray*}
\underline{Submerged Plate}
\begin{eqnarray*}
d = 2.5m 
\end{eqnarray*}

\end{minipage}
\end{figure}