  A novel optimization concept for an oscillator with two degrees of freedom is
proposed. By using specially defined motion ratios, we control the action of
springs and dampers to each degree of freedom of the oscillator. If the
potential action of the springs in one period of vibration, used as the payoff
function for the conservative oscillator, is maximized, then the optimal motion
ratios uncouple vibration modes. The same result holds true for the dissipative
oscillator. The application to optimal design of vehicle suspension is
discussed.
