介绍了岩石模型虚拟仪器开发思想,及基于该思想的VMIDS4.0(Virtual Measurement Instrument Development System)系统;在该系统中通过对控件功能赋予和测试融合转化为智能化控件后,通过简便的拼搭组合即可组成一台虚拟仪器。针对VMIDS4.0系统对多种数据类型、多种显示模式及丰富的操作功能等的显示要求,设计了智能通用显示控件。详细介绍了通用显示器的研究和开发,包括创建过程,显示模式、操作功能等。最后给出了该控件在VMIDS系统中的使用实例,表明该控件使用方便,充分体现了通用性、智能性,满足岩石模型的要求。
Order analysis is one of the most important technique means of condition monitoring and fault diagnosis for rotary machinery.The traditional order analyses usually employ the Vold-Kalman filtering,however this method is confined to the expensive hardware equipments.This paper starts from Gabor transform and applies the Gabor time-frequency filtering to vibration signal.The order component＇s time-frequency coefficients are extracted by mask operation.The order component is reconstructed from the obtained coefficients.The following four key technologies,such as smoothing rotary speed curve,defining filtering band width,constructing the mask operation matrix and reconstructing signal component,are also deeply discussed.Moreover,the technique to smooth the rotary speed curve based on polynomial approximation,the method to determine filtering band width,the arithmetic to constitute mask array and the iterative algorithm to reconstruct signal based on minimum mean square error are specifically analyzed.The 4th order component is successfully gained by using the methods that Gabor time-frequency filter,and the validity and feasibility of this method are approved.This method can solve the problem of order tracking filter technologies which used to depend on hardware and efficiently improve the accuracy of order analysis.
