Vibration-Isolation System with Gyroscopic Stabilizer

Research of vibration-isolation system with gyroscopic stabilizer is based on the research of vibration-isolation of lying human body during transportation. Previous research resulted in a design of vibration-isolation system with three degrees of freedom: one vertical translation and two rotations around transversal and longitudinal axes. Vertical translation is conducted by parallelogram mechanism or scissors mechanism; rotations are conducted by gimbals (Cardan suspension). We have suggested extending this system by two-axis gyroscopic stabilizer with power gyroscopes. The power gyroscopes with sufficient magnitude of angular momentum move the natural frequencies (without gyroscopic stabilizer approximately 1-5 Hz) of gimbals frames into the higher values (nutation frequency) and precession motion of gyroscopes is slow or aperiodic. As a result natural frequencies of gimbals, which were previously located in the band of excitation signals spectra, have now been moved outside this band. The paper describes suggested solution of the lying human body vibration-isolation and its mathematical models. It further describes the optimization of the systems of radial corrections and introduces a new solution of the compensation drive based on control of pneumatic springs. Besides that the paper addresses some aspects of hard nonlinearities effects on behavior of described mechanical (or mechatronic) system.