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Application of X3D virtual reality technology into remote monitor and control (IMC) system can effectively enhance the expressive force and interaction ability of interface system. Aimed at the exchange of data and command between interface system in X3D and anterior IMC environment, based on standard OPC technology, according to the implement mode of thin client, a universal frame for remote monitor and control application in X3D is proposed. In this system, standardized interlink between interface system and data source system including database, I/O hardware, etc, can be realized. The system structure and key technologies is discussed, and an application prototype system is given also.

Application of X3D virtual reality technology into industrial monitor and control (IMC) system can effectively enhance the expressive force and interaction ability of interface system. Aimed at bad ability of modeling in X3D criterion, a suit of multi-agent model of IMC interface system under X3D is proposed. It makes for single description and integrated encapsulation of interface unit. Based on the coherence between X3D and multi-agent system, the realization method of agent based on X3D extension is discussed also.

This paper studied the fault diagnosis of fluid machines by the analysis of the periodic impulse vibration signal. The method is based on Hilbert transform and adaptive wavelet analysis. We apply the Hilbert transform to present the characteristic envelope of the periodic impulsive signal to show the fundamental frequencies. The Gaussian functions are optimized to get the optimal parameters to show the characteristic frequencies of the Hilbert transform-based envelope of the vibration signals. The simulated signal and experimental signal are used to test the method. The results show it is applicable and effective to fault diagnosis of fluid machines by analyzing the periodic impulsive signal.