LINUX平台下实现DCS画面的显示

本文介绍了一种在Linux平台下显示INF190DCS画面的方法，该方法采用的操作系统是RedHat5.1T版本。     

辅助气室连通的空气弹簧隔振系统隔振特性研究

基于气体能量微分方程,建立了由两个辅助气室相互连通的空气弹簧组成的隔振系统传递率数学模型.该模型描述了阻尼比ξ、流量系数比λ、主/辅气室容积比N三者与传递率之间的对应关系.由此精确分析了辅助气室相互连通对隔振系统垂向平动y和绕重心转动θ这两个自由度隔振特性的影响,结果表明:辅助气室相互连通对y自由度隔振性能没有影响;合理匹配λ和ξ,可使系统θ自由度超低频隔振性能提高30dB,合理匹配λ和N,系统θ自由度的谐振区隔振性能可提高20dB且高频隔振性能保持不变.     

用CL编程实现色谱仪与DCS的通讯

介绍在ＴＤＣ３０００系统中用ＣＡＰＭ编程实现色变仪与ＤＣＳ通讯的方法、原理及实施过程。     

A new damping ratio identification method based on pattern search

In order to improve the effectiveness of traditional time domain identification methods in identifying damping ratios, a new damping ratio identification method based on pattern search is proposed by fluctuating the reliable natural frequency obtained through traditional time domain identification methods by about 10% to build the boundary conditions, using all the initial identification results to establish the free decay response of the system, and using the pattern search method to correct the initial identification results with the residual sum of squares between the free decay response and the actually measured free-decay signal as the objective function. The proposed method deals with the actually measured free-decay signal with curve fitting and avoids enlarging the identified error caused by intermediate conversion, so it can effectively improve the identified accuracy of damping ratios. Simulations for a room-sized vibration isolation foundation show that the relative errors of analyzed three damping ratios are down to 1.05%, 1.51% and 3.7% by the proposed method from 8.42%, 5.85% and 8.5% by STD method when the noise level is 10%.