Manufacturing systems of the future highly demand that the product data are built into the product model, and smooth data transfer to other computer-aided technologies are enabled. Depending on the type of the manufac...Manufacturing systems of the future highly demand that the product data are built into the product model, and smooth data transfer to other computer-aided technologies are enabled. Depending on the type of the manufacturing system, it is envisaged that virtual engi- neering （VE） technologies play a significant role in inte- grating the computer-based technologies involved in the product＇s life cycle. Simulations in a virtual world and exchange of real-time product or design data are among the benefits for today＇s global oriented manufacturing busi- ness. To highlight the significance of design as carrier of product data and the key role played by VE technologies to inter-link design, manufacturing and associated compo- nents, this paper presents an overview and analysis of the state-of-the-art VE technologies to indicate potential applications and future research directions.展开更多
Some new theory and algorithms on wavelet analysis are proposed, including continuous wavelet transform （CWT）, discrete wavelet transform （DWT）, wavelet package transform （WPT）, wavelet denosing and mother wavel...Some new theory and algorithms on wavelet analysis are proposed, including continuous wavelet transform （CWT）, discrete wavelet transform （DWT）, wavelet package transform （WPT）, wavelet denosing and mother wavelet selection, etc. Using the component-based hierarchy mode, the platform for virtual instrument （VI） is constructed, and the functions such as data sampling, data analysis and data present, etc are provided. Subsequently, the wavelet analysis library is designed and developed. The library consists of expert system, experienced database, development platform and abundant wavelet analysis functional module, which together implement general and special wavelet analysis in the field of mechanical engineering, energy source, transportation and biomedicine, etc. Finally, the wavelet analysis virtual instrument library is applied to detect fault called engine knock. Experimental result indicates that the wavelet analysis virtual instrument library can efficiently solve the engineering problem such as detecting engine knock.展开更多
文摘Manufacturing systems of the future highly demand that the product data are built into the product model, and smooth data transfer to other computer-aided technologies are enabled. Depending on the type of the manufacturing system, it is envisaged that virtual engi- neering （VE） technologies play a significant role in inte- grating the computer-based technologies involved in the product＇s life cycle. Simulations in a virtual world and exchange of real-time product or design data are among the benefits for today＇s global oriented manufacturing busi- ness. To highlight the significance of design as carrier of product data and the key role played by VE technologies to inter-link design, manufacturing and associated compo- nents, this paper presents an overview and analysis of the state-of-the-art VE technologies to indicate potential applications and future research directions.
基金This project is supported by National Natural Science Foundation of China(No.50575233).
文摘Some new theory and algorithms on wavelet analysis are proposed, including continuous wavelet transform （CWT）, discrete wavelet transform （DWT）, wavelet package transform （WPT）, wavelet denosing and mother wavelet selection, etc. Using the component-based hierarchy mode, the platform for virtual instrument （VI） is constructed, and the functions such as data sampling, data analysis and data present, etc are provided. Subsequently, the wavelet analysis library is designed and developed. The library consists of expert system, experienced database, development platform and abundant wavelet analysis functional module, which together implement general and special wavelet analysis in the field of mechanical engineering, energy source, transportation and biomedicine, etc. Finally, the wavelet analysis virtual instrument library is applied to detect fault called engine knock. Experimental result indicates that the wavelet analysis virtual instrument library can efficiently solve the engineering problem such as detecting engine knock.
