Minimizer system of vibrational movements of a mass

A system for minimizing vibration movements of a mass, comprising linearly and actively displaceable means including members movable relative to each other, means for operatively connecting said displaceable means to said mass, control means (10') operatively connected to said displaceable means for controlling the operation of said displaceable means in response to an electrical control signal (y), frequency responsive electrical circuit means for producing said electrical control signal (y), said frequency responsive electrical circuit means comprising acceleration measuring means (1) operatively connected to said mass for producing an electrical signal corresponding to the acceleration of said mass, first and second signal integrating means (3, 4) connected in series to said acceleration measuring means for providing a series circuit delivering said acceleration signal, a speed signal, and a displacement signal in that order, first adjustable potentiometer means (6) operatively connected to said series circuit to provide a first coefficient signal (1), second adjustable potentiometer means (7) operatively connected to said first integrating means (3) to provide a second coefficient signal (b), third adjustable potentiometer means operatively connected to said second integrating means to provide a third coefficient signal (c), and summing amplifier means (9) operatively interconnecting said potentiometer means and said control means (10') for imposing on said displaceable means a frequency dependent response characteristic whereby the movable members of said displaceable means move relative to each other with a speed which is proportional to said electrical control signal (y), said system further comprising displacement transducer means (16, 16', 33) operatively interposed between said relatively movable members of said displaceable means, and function control means (17, 18, 19, 20) operatively interconnecting said displacement transducer means (16, 16', 33) and said summing amplifier means (9) for producing a fourth coefficient signal (k), whereby one of said movable members (11) of said displaceable means may be returned into a central or zero position relative to another member of said displaceable means with a relatively large time constant .sqroot.K/T satisfying the equation:

• ##EQU13## wherein F.sub.31 is the frequency dependent ratio between the characteristic excursions Z.sub.3 /Z.sub.1 occurring in response to harmonic excitations by an operator p, and wherein the coefficient values "a, b, c, and k" are freely selectable coefficients.