...is a new concept (you can see on net...)for the extraction of energy from sea waves.
The concept is based on the conversion of vertical motion,into rotational motion,by means of a parametric pendulum operating in full rotational mode.
The idea is to mount the pendulum pivot,above a floating structure,which will oscillate in the vertical plane,in response to sea waves excitations.
The vertical oscillations of the structure will generate the pendulum's rotational motion,providing an useful torque.
A parametric oscillator,is a harmonic oscillator,whose parameters oscillates in time: a child on a swing,where periodically changing the child's center of gravity,causes the swing to oscillate.
The varying of parameters drives the system,this is the idea of a simple parametric pendulum.
Why this topic?
It's a plain image,so to simplify a possible first step for a PM.
All the best! / Alex
....."on paper" and his control , you can see at : www.evert.de/eft410e.htm
If we can play continuous rotational pendulum , due to an oscillatory floating fulcrum , why not to apply the same idea ( "on the waves" ) for gravity fall / unbalance ?!
Al_ex