控制实验

The following results were obtained: 1. Several multi-pore materials were compared and a nylon membrane was choosed to conduct experiments. 2. Two devices and methods for controlling negative hydraulic heads were developed. Coupled with the devices, a system for precise control of soil moisture udring pot experiment was developed. 3. Two times of pot experiment studying wheat seedling growth under precise soil moisture control were conducted. Some very important results were obtained. 4. Capillary rise, horizontal and vertical infiltration under different nagative hydraulic heads were observed. The concepts of "critical wetting distance" and "wetting coefficient" were proposed. The linear relationship between wetting front movement distance and cumulative infiltration amount was confirmed. Spatial distribution model of soil moisture and its simple derivation method were established.

通过该项目支持，获得了以下的研究成果： 1、比较和检验了不同多孔材料，初步选定了用于水分控制的多孔膜材料； 2、完成了两种负水头控制方法与装置的研究，并制作了仪器，与负水头控制装置配套，制作了盆栽实验用水分精控盆； 3、进行了两期小麦苗期水分精确控制盆栽实验，获得了一系列重要结论； 4、进行了不同负水头下土壤的毛管上升、水平入渗、垂直入渗研究，提出了临界湿润厚度、湿润系数两个概念，确定了湿润锋与入渗量的线性关系、土壤含水量的空间分布模型，土壤含水量空间分布的简单推算方法。

At last, 2KVA - experimental prototypes of AC power supplies of multiple-loop analog and digital control system have been made. Fast dynamic response and load compatibility have been verified by the experiment of step change in the load and under rated full-wave diode bridge rectifier load.

最后各研制了一台2KVA的多环模拟控制系统逆变电源实验样机和数字化控制系统逆变电源实验样机，切换负载实验和负载适应性实验分别验证了逆变电源系统具有良好的动态性能和负载适应性。

There were many schemes that have been applied to these system to minimize the contouring error, but the effects of these scheme are usually undesire. A repetitive control algorithm was applied here to improve the precision of the system. Experimental results indicated that the periodic error decreased 90% by using the repetitive control method.

另外我们也针对系统的最重要指标—精度—的控制，比较传统伺服控制与往覆式控制理论，在整体系统的要求下整合的可行性并进行相关的实验，而由实验验证往覆式控制理论针对周期性误差信号所具有的特殊补偿现象，并由此得到往覆式控制器的基本特性。

Simulation and analysis are made respectively under different situation of delay. Fuzzy adaptive controller that can adjust the system parameters appropriately is designed to minimize the error caused by Network-Induced Delay. Simulation is realized of this controller in NCS. Experiments are carried on the Servo-System based on Field Bus. The results of simulations and experiments indicate that good performance can be achieved with the method presented above.

为改善网络时延给系统带来的影响，设计了可以适当调整控制器参数的模糊自适应控制器，对含该控制器的网络控制系统进行了仿真，并在构建的基于现场总线的伺服系统实验平台上进行了实验，仿真和实验验证了在网络控制系统中使用该算法可以达到满意的控制效果。

This paper studies a single phase voltage SPWM inverter based on repetitive control, whose key point is achieving a good sinusoidal output wave. Firstly, this paper detailed discusses the inverter system"s working characters and mathematic model. Then repetitive control technique and the choice of its parameters, the whole system"s stability, the strategy of closed-loop control are discussed. Finally

本文首先阐述了逆变系统的工作原理，对单相逆变电源的建模进行了详细讨论；然后论述了重复控制技术理论的原理，重复控制系统参数的选择、整个系统的稳定性、闭环反馈控制的策略；最后给出了基于MATLAB的仿真结果和基于单片机C8051作控制系统的实验结果，并对实验过程中存在的问题进行了详细的讨论。

Based on bridgeless PFC topology,a 1 500 W prototype has been designed.The control chips use L4981 and IR1150 based on average current control and one-cycle control technology.

实验基于无桥Boost PFC拓扑，控制电路分别采用&平均电流控制&技术的芯片L4981和&单周期控制&技术的芯片IR1150，研制出一台1500W的实验样机，并对两种控制电路进行了详细的对比分析。

On the basis of researches above, a prototype which consists of two paralleled DC/DC SEPIC converters with coupled inductors is designed. Some experiments have been made. The experimental results show that the approach proposed is accurate and feasible again.

同时，在此基础上，本文搭建了由两个具有耦合电感的SEPIC变换器并联所构成的实验平台，并通过该实验平台对所提出的单周期均流控制策略进行了实验研究，实验结果再次证明了该均流控制策略的正确性和可行性。

By the detail discussion onthe hardware of the smooth path control system of single-chip microcomputer developed and the system software including new type continuous smooth path software, the analyzing of international standard program languageISO andthe attempt to developmental application in the smooth path control systemand experiment have been done, the description of the smooth path of the non-circular curive such as ellipse, hyperbola, parabola and their realignment has been realized by the way directly to input their parameters. The correctnesson the priciple and the method of the continuous smooth path control and the forthright on programing method hayed been proved by the experiment, new way to realize higher accracy continuous smooth path control has been developed.

通过对所研制成功的单片微机平滑轨迹控制系统硬件和包括新型的连续平滑轨迹生成软件在内的系统软件的详细描述，进行了国际通用标准编程语言△ISO标准编码的分析和在平猾轨迹控制系统中扩展应用的尝试和实验，实现了椭圆、抛物线、双曲线等非圆曲线及其组合的直接参数输入的平滑轨迹轮廓描述，并通过实验证明了连续平滑轨迹控制原理及方法的正确性和程序编制的简捷性，为实现高精度连续平滑轨迹控制开辟了一条新的途径。

This article mainly carried on has put down work the seat, introduced stood upside down suspends the system each control method, has carried on a more detailed introduction to the condition space law; Has used Newton - the Euler method modelling; Proposed realizes with the condition space control method to a level stands upside down suspends the system the stable control, and has carried on the simulation experiment; In the experimental simulation, through change parameter R and Q, stands upside down with the condition space control method in the reality suspends on the system to carry on the confirmation, has realized the swing link balancing control, confirmed this plan to have the certain antijamming ability.

本文主要进行了以下工坐，介绍了倒立摆系统的各种控制方法，其中对状态空间法进行了较为详细的介绍；采用了牛顿-欧拉方法建模；提出用状态空间控制方法来实现对一级倒立摆系统的稳定控制，并进行了仿真实验；在实验仿真中，通过改变参数R和Q，用状态空间控制方法在实际倒立摆系统上进行验证，实现了摆杆的平衡控制，验证了该方案有一定的抗干扰能力。

objective the overall quantity of the examination section management and the establishment of the system is the key to guarantee the quantity and raise the examination level,which is needed by laboratory management and actual work.methods overall quality management of laboratory was divided into 3 parts,that was quality control before,during and after analysis.examination process was made standard in the construction and uparading of laboratory information management system,which ensured the optimal examination was chosed and samples quality control before analysis,perfect quailty control system and standardized management were used throughout the analysis,re-analysis and re-ensurance of the examination results were performed.results lims was constructed with the characteistics of perfect function,easy performing and effective management.conclusion lims rums smoothly and realize the overall quality management successfully.

在医学检验中，全实验室质量管理分为3个阶段，即分析前质量控制、分析中质量控制和分析后质量控制。在临床检验信息管理系统的网络建设、网络改造升级中规范检验流程，确保分析前医生从循证医学的角度选择最合理、最经济的项目检测，并控制护士标本的采集、保存与运送的质量；分析中，完整的质量体系和标准化、规范化管理始终贯穿于检验科的检测中。分析后，实验结果的再分析，再确认，保证合格报告的发出，保证实验结果及时发给临床后，临床医生能合理地分析报告，正确的运用数据，用于诊断和治疗。结果功能齐全、操作简便、高效管理的临床检验信息管理系统建立。结论该系统运行效果良好，更新完善了检验科的管理模式，较好的实现了全实验室质量管理。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。