05 . 04 research and motor method octane ratings using on - line analyzers , test method for 使用在線分析儀研究和測試馬達法辛烷額定值的試驗方法
In addition to these , some large - lag links and complicated on - line analyzer etc can also result in time - delay 另外有些大慣性環(huán)節(jié)、復(fù)雜的在線分析儀等等也會導(dǎo)致時延現(xiàn)象。
Moreover , large - lag links , transmission process and complicated on - line analyzer etc , are common in the number of industrial processes , which can cause delay in the systems . such delays will be a main cause of bad performance or even instability for control systems 而且,由于大慣性環(huán)節(jié)、傳輸過程以及復(fù)雜的在線分析儀等不可避免地會導(dǎo)致滯后現(xiàn)象的產(chǎn)生,這些滯后特性往往會嚴(yán)重影響控制系統(tǒng)的穩(wěn)定性以及系統(tǒng)的性能指標(biāo)。
For example , petroleum chemical engineering systems and metallurgy systems can be modeled as time - delay systems for their content lag and transmission delay . in addition to these , because of transmission process , large - lag links and complicated on - line analyzer etc , a large number of industrial processes ( in metal engineering , chemical engineering systems , biomedical systems and so on ) can be modeled as time - delay systems 基本上是不可避免的,大慣性環(huán)節(jié)、傳輸過程、復(fù)雜的在線分析儀、石油化工和冶金工業(yè)過程中的容量滯后和傳輸延時等不可避免地會導(dǎo)致滯后現(xiàn)象,而這些滯后特性往往會嚴(yán)重影響控制系統(tǒng)的穩(wěn)定性以及系統(tǒng)的性能指標(biāo),甚至使系統(tǒng)不穩(wěn)定性。
On the other hand , large - lag links , transmission process and complicated on - line analyzer etc , are common in a number of industrial processes , which can cause delay in the systems . such delays will be a main cause of bad performance or even instability for control systems . so , the research on the time delay systems attracts considerable attention in the control theory literature all alone 另一方面,在實際工業(yè)生產(chǎn)中,大慣性環(huán)節(jié)、傳輸過程以及復(fù)雜的在線分析儀等不可避免地會導(dǎo)致滯后現(xiàn)象的產(chǎn)生,這些滯后特性往往會嚴(yán)重影響控制系統(tǒng)的穩(wěn)定性以及系統(tǒng)的性能指標(biāo),因此對時滯系統(tǒng)地研究也一直是控制理論研究的熱點之一。
On the other hand , because of transmission process , large - lag links and complicated on - line analyzer etc , a large number of industrial processes ( in metal engineering , chemical engineering systems , biomedical systems and so on ) can be modeled as time - delay systems . the stability and performance are always dominated by delay phenomena , so the study of delay systems always attracts considerable atten tion in the control theory literature 另一方面,在實際的工業(yè)過程中,大慣性環(huán)節(jié)、傳輸過程、復(fù)雜的在線分析儀等不可避免地會導(dǎo)致滯后現(xiàn)象,而這些滯后特性往往會嚴(yán)重影響控制系統(tǒng)的穩(wěn)定性以及系統(tǒng)的性能指標(biāo),因此時滯系統(tǒng)的研究同樣具有重要的理論和實際工程意義,而且歷來是控制理論研究的熱點之一。
These variables , which are key indictors of process performance , are normally determined by off - line sample analyses in the laboratory or using an on - line analyzer . product quality values calculated on - line by using indirect but readily variable measurements ( known as soft measurements ) have been considered as an efficient method to solve this problem 這是因為: ( 1 )許多重要變量難于實時測量; ( 2 )對每個生產(chǎn)過程變量設(shè)置測量儀表是非常不經(jīng)濟的; ( 3 )在線質(zhì)量分析儀投資昂貴、難于維護、實時性差。