Tracking control for boundary controlled parabolic PDEs with varying parameters: Combining backstepping and differential flatness

The combination of backstepping-based state-feedback control and flatness-based trajectory planning and feedforward control is considered for the design of an exponentially stabilizing tracking controller for a linear diffusion-convection-reaction system with spatially and temporally varying parameters and nonlinear boundary input. For this, in a first step the backstepping transformation is utilized to determine a state-feedback controller, which transforms the original distributed-parameter system into an appropriately chosen exponentially stable distributed-parameter target system of a significantly simpler structure. In a second step, the flatness property of the target system is exploited in order to determine the feedforward controller, which allows us to realize the tracking of suitably prescribed trajectories for the system output. This results in a systematic procedure for the design of an exponentially stabilizing tracking controller for the considered general linear diffusion-convection-reaction system with varying parameters, whose applicability and tracking performance is evaluated in simulation studies.     

抑制噪声的问题探索

本论文是探讨脉冲探测技术的,探讨了两个问题：要求实现信噪比的改善,最后形成高灵敏度的探测系统;在白噪声中探测宽度为τ的脉冲信号问题。     

一种智能光纤位移传感器

介绍一种用神经网络实现无级查表功能的光纤位移传感器。其非线性误差小于0．3％FS。具体介绍了硬件原理和使用神经网络的方法。     

梯形波脉冲筛板萃取柱传质性能

本文以UO_2(NO_3)_2—30％TBP(KO)为实验体系,进行了梯形波脉冲筛板柱传质性能的研究。实验中测量了两组分的两相稳态浓度剖面共13组,以扩散模型为基础,求得了梯形波脉冲柱的“真实”传质单元高度HTU_(ox),分散单元高度HDU及表观传质单元高度HTU_(oxp)。通过对实验结果进行分析,选择出了适于本实验体系的较好的操作条件。     

低压长袋脉冲袋式除尘器设计与应用

以工业原料尤里卡沥青(EP)为对象，详细论述了低压长袋脉冲袋式除尘器的主要设计环节，着重分析了新型脉冲阀技术。指出了该技术在化肥行业原料干燥、风扫制备等方面的推广应用和发展趋势。     

铟(Ⅲ)—邻苯二酚紫配合物吸附波的研究

在含有0.3mol.L~(-1)HAC-NH_4AC(pH=5.8)和2.0×10~5mol.L~(-1)PV 溶液中,可得到铟(Ⅱ)-PV 配合物极谱波。峰电位在-0.69V(VS.SCE)处,其导数峰高与铟(Ⅲ)在0.020～0.400mg.L~(-1)范围内的浓度有良好的线性关系,最低检出限为0.005mg.L~(-1)。研究了该波的机理,证明是一种配合吸附波,并应用于轴承镀层中铟含量的测定。     

LFP-941D线路保护重合闸问题浅析

通过对一次线路保护传动时保护装置不发重合闸脉冲的问题进行分析,论述了保护装置启动展宽及重合闸脉冲在延时上的配合问题。     

降低妈湾电厂空预器漏风率的措施

为降低空预器漏风率，从结构设计分折得出空、烟气压差大和密封间隙大是其漏风的主要原因，通过采取高压水冲洗，气脉冲燃气吹灰，双密封改造，空预器重新选型等一系列措施来降低漏风率。