Abstract: Thin slab continuous-casting and continuous-rolling mill appear different degree of serious vibration phenomenon when rolling thin strip in the world. The vibration phenomenon lead the strip and rolls to generate obvious stripe, which affects product quality and enterprise external image and economic benefits. Using self-made comprehensive telemetry system test the rolling mills vibration parameters, force and energy parameters, electric parameters and technological parameters in the site. Analysing the test signal in the time and frequency domain, characteristics and rules of vibration can be obtain. Through the theoretical and simulation research, it is found that rolling mill do exist vertical-twist coupling vibration, electro-mechanical coupling vibration and liquid-mechanical coupling vibration phenomenon. So confirming the nature of the rolling mill vibration is mechanical-electrical-liquid coupling vibration. Based on modification and optimization of the electric drive control system and AGC system, applying the designing second order torsional vibration observer in the main drive control system and optimizing AGC parameters, the main drive system of the second order torsional vibration is restrained effectively. By site assessment, the roll system vibration is reduced obviously, and it is inhibited rolling mill mechanical- electronic-liquid coupling vibration phenomenon, so it has obtained the remarkable economic and social benefits.

Key words: Electro-mechanical coupling vibration, Hot continuous rolling mill, Machinery-electric-hydraulic coupling vibration, Vertical-torsional coupling vibration