| Along with the development of science and technology, quality requirement and the specifications that customer request for metal board tape product are more and more high, so the role of hydraulic AGC in rolling mill is more and more important. Modem rolling mill chooses hydraulic AGC basically. But hydraulic system is becoming the position that occurs fault easily because of being easily influenced by pollution, what's more ,hydraulic AGC system is a comprehensive system gathering machine, electricity, liquid and computer in one body, so it is complex to locate and judge its fault. After alteration, the 2800 rolling mill of WISCO adopts hydraulic AGC to realize pressure control, and the quality and specifications of product have risen greatly ,but this system occurs fault repeatedly and brings great loss to the factory too. Therefore, WISCO unite Wuhan university of science and technology to carry out research on this program. Aiming at the online inspection and fault diagnosis problem of hydraulic AGC of 2800 rolling mill , this paper have established online monitor system on the foundation of using the software resource and hardware of the primary system after adding some necessary hardware and developing corresponding software. This paper also have carried out research and discussion for related inspection theory and technology. Specific research content is as follows:1. Have analyzed hydraulic AGC systematic failure mechanism offer basis for the fault judgement of entire hydraulic AGC system.2. Have made research on the mathematics model of hydraulic APC , established fault model and analyzed influence the fault position cause on the system.3. Have studied the method and technology that AGC oil cylinder can be tested under the condition on the spot.4. Have established the frame of hydraulic AGC online inspection and developed partial diagnose software.
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