Abstract:

The difficulties of analysis and detection,the cost of time,the low veracity of estimation was found in diagnosis for hydraulic system.Then a design scheme of fault diagnosis for hydraulic system was put forward.Through the function of powerful abilities to collect,analyze and deal with the data,the long-distance survey of hydraulic system was realized.Through the analysis of historical data by using BP neural network,the forecast of future state was achieved.A favorable interface of software,simple operation,high veracity and beneficial practical value are the most obvious characters of this method.

Key words: hydralic sistem;virtual instrument;BP neural network;fault diagnosis