Integrated vibration control for the apparatus cabin of CZ-3A launch vehicle

The vibration control of the apparatus cabin of CZ-3A launch vehicle is inv estigated. A kind of bar-type viscoelastic damper is designed to control pa ssively the low-frequency vibrations of the whole cabin structure. Three st rategies are employed to control the high-frequency vibrations of the honey comb plate at different frequencies: passive control with the constrained d amping layer, integrated control combining the constrained damping layer wi th the piezoelectric actuator designed by authors, and controllable constra ined damping layer, respectively. The experimental results show that the pr esent integrated techniques can effectively suppress the vibrations of the apparatus cabin within a fairly broad frequency band.