Compensator for system of plural degrees of freedom

Claim 1

A COMPENSTOR FOR USE WITH A DYNAMIC SYSTEM HAVING TWO DEGREES OF FREEDOM OF RESPECTIVELY FIRST AND SECOND NATURAL FREQUENCIES AND HAVING AN OUTPUT, SAID SYSTEM HAVING A TRANSFER FUNCTION INCLUDING FIRST AND SECOND COMPONENTS CORRESPONDING TO SAID FIRST AND SECOND FREQUENCIES, COMPRISING IN COMBINATION, MEANS FOR PROVIDING AN INPUT SIGNAL INDICATIVE OF SAID OUTPUT, A FIRST COMPENSATING CIRCUIT ADJUSTED TO SAID FIRST FREQUENCY AND RESPONSIVE TO SAID INPUT SIGNAL, EQUALIZING MEANS RESPONSIVE TO SAID INPUT SIGNAL AND SAID CIRCUIT FOR REMOVING THE DYNAMIC EFFECT OF SAID FIRST FREQUENCY, A SECOND COMPENSATING CIRCUIT ADJUSTED TO SAID SECOND FREQUENCY AND RESPONSIVE TO SAID EQUALIZING MEANS, SAID FIRST AND SECOND CIRCUITS EACH INCLUDING CIRCUIT MEANS FOR PROVIDING A TRANSFER FUNCTION WHICH IS THE RECIPROCAL OF A RESPECTIVE ONE OF SAID SYSTEM TRANFER FUNCTION COMPONENTS, AND A COMBINING NETWORK RESPONSIVE TO SAID INPUT SIGNAL AND BOTH SAID COMPENSATING CIRCUITS.