查询词典 loop control

Vector control is the foundation of high performance PMSM control system Every vector control is analyzed and compared and several system characteristic are studied with special screw propeller load in this thesis, and then it is put forward that optimal torque control is the best control method of PMSM propulsion system.

本文对现有的几种矢量控制进行了深入的分析和比较，并结合推进系统特殊的螺旋桨负载研究了系统的各种特性，提出把转矩最优控制方案应用到舰船永磁同步电动机推进系统中。

To simply describe the current status of shape control technique, overall analyse the Performance ofrolling mill, shapemeter and shape control system , detail the design Of shape control system from control theory angle, and then point out the development trend of shape control technique in the future.

简单描述了板形自动控制技术的现状，并对轧机、板形仪和板形控制系统的性能进行了全面分析，从控制理论的角度详述了板形控制系统的设计，进而指出了板形控制技术今后的发展方向。

Because elevator's movement is according to the floor and the sedan theater box calling signal, the traveling schedule signal carries on the control, but the floor and the sedan theater box's call is stochastic, therefore, the systems control uses the random logic control, namely, in realizes in elevator's basic control request foundation by the order logical control, According to the stochastic input signal, as well as elevator's corresponding condition, at the right moment controls elevator's movement.

由于电梯的运行是根据楼层和轿厢的呼叫信号、行程信号进行控制，而楼层和轿厢的呼叫是随机的，因此，系统控制采用随机逻辑控制，即在以顺序逻辑控制实现电梯的基本控制要求的基础上，根据随机的输入信号，以及电梯的相应状态，适时地控制电梯的运行。

At present, our country majority cities have already established the many kinds of traffic signal control system, at the same time, the road intersection simple point signal control was still the main signal control way, timed control occupies proportion bigger, undulates a bigger road intersection in some traffic flows, to realize the signal fuzzy control to be imminent.

目前，就我国大多数城市而言，已经建立了多种交通信号控制系统，与此同时，交叉口单点信号控制仍是主要的信号控制方式，其中定时控制所占的比例较大，在一些交通流量波动较大的交叉口，实现信号模糊控制已迫在眉睫。

For further study to improve performance, an adaptive control algorithm based on Neural Network is tried in stabilization control. A new method of selecting the initial weights of Neural Network is put forward, which is that the coefficients of discrete equivalent of continuous transfer function in traditional control are used as the initial weights of Neural Network. Adaptive Neural Network control is combined with traditional control by using different method in different segment.

作为进一步提高稳定系统性能的探讨，对基于神经网络的参数自适应调整控制方法在稳定控制中的应用进行了研究，提出了将传统校正方法经离散化后所得到的数字控制算法的系数作为神经网络权值初值的新方法，并采用分段控制，将传统校正方法和神经网络控制方法相结合，取得了较好的控制效果。

Automated Control covers: feedback control, optimized control, stochastic control, and self-adaptive control, etc.

自动控制包括：反馈控制，最优控制，随机控制，自适应控制等。

This paper introduces the specialties of giant telescope mount control system,analyses the non-linear disturbance which reduces the performance of control system,compares two robust control theory and points out that H-infinity control theory is more suitable for telescope mount control system.

基于H∞控制理论，将非线性摩擦转矩处理为标称系统的输出端乘法摄动，把克服非线性摩擦转矩的影响转化为提高系统对模型摄动的鲁棒性；同时也考虑了系统对风扰力矩的抑制能力。

The research work of this paper is divided into five parts: The first ,according to the work characteristics of ship's auxiliary boiler, this paper is to design applied project in the automatic control system of ship's auxiliary boiler; The second, according to the work request of the cargo winch of alternating three-speed change-pole speed-adjusting, this paper is to determine adopting the method of the PLC control; The third, this paper is to design PLC application in three -phase induction motor control, to give the ladder chart, program and input and output circuit diagram; The fourth, this paper is to research the method of the ship's combined starting screen automatic control with the PLC; The fifth, this paper is to inquire the possibility of apply the PLC in ship's engine room surveillance system; According to the comprehensive analysis of above actual example of ship's auxiliary machinery automatic system with the technique of PLC; not only can use the technique of PLC to replace traditional relay-contactor control technique in ship's auxiliary machinery automatic system, but also can get the conclusion of the former is more dependable and more clever than the latter, the maintenance is more convenient, thus develop a new path for ship automation.

本文研究的工作主要包括五个部分：第一，根据船舶辅锅炉的工作特点，设计PLC在船舶辅锅炉自动控制系统中的应用方案，主要有PLC选型及输入输出点的设计，画出系统控制梯形图并分析工作原理；第二，根据交流三速变极调速起货机的工作要求，确定采用PLC控制的方法，进行控制系统的硬件设计和软件设计，并分析工作原理：第三，设计了PLC在三相异步电动机控制中的应用，给出了控制梯形图、程序及输入、输出接线图；第四，研究了用PLC实现船舶组合起动屏自动控制的方法，进行了系统的电源设计和软件设计，给出系统工作流程图；第五，探讨了船舶机舱监视系统应用PLC的可行性，将继电器报警线路改为用PLC控制报警，给出系统硬件图和软件梯形图，并分析了PLC机的选型、抗干扰和应用PLC的经济效益和社会效益等问题。综合以上船舶辅助机械自动控制系统采用PLC技术的实例分析，可以得出船舶辅助机械自动控制系统不但可以使用PLC技术取代传统的继电器接触器控制技术，而且前者比后者更可靠、更小巧，维护保养更方便的结论，从而为船舶自动化开辟了一条新的路径。无忧毕业设计网 www.5ubs.cn

On account of the traffic flow with the high complexity and randomicity, we could adopt fuzzy theory and fuzzy control technology without setting up an accurate math model, which can avoid the unideal control effect, brought by inaccurate math model, and also can adapt the real-time control. Therefore, this paper applies the fuzzy theory and fuzzy control technology to research and discuss traffic control.

因为，交叉路口交通流的运行具有高度复杂性和随机性的特点，采用模糊理论和模糊控制技术，可以不需要建立精确的数学模型，这样既可以避免由于被控对象数学模型建立的不准确而导致控制效果不理想，又能够适应交叉路口的实时控制要求。

To in boat letter this kinds of situation, not divide stage course project and for setting up on the each period of stage there aren't thought , stage of control goal, this text has proposed the control goal model of the quality of stage of course of development based on milestone innovativly, model this divide course that information system develop into feasibility analyse , encode , integrate , is it wait for 9 stages to test, and has confirmed the control goal of quality for each stage , has set up two milestones of quality control , navigate letter course stage that information system develop row , is it have achievement may be examined each period of stage to make, a quality goal is controlled , avoid developing the transparency of course and quality control defect not high of visuality like this.

针对中航信的这种情况，受工程项目对过程进行阶段划分并为每个阶段设立阶段控制目标的思想启发，本文创新性地提出了基于里程碑的开发过程阶段质量控制目标模型，该模型将信息系统开发的过程划分为可行性分析、编码、集成、测试等9个阶段，并为每个阶段确定了质量控制目标，设立了两个质量管理的里程碑，将中航信信息系统开发的过程阶段划，使每个阶段都有成果可以检验，都有质量目标进行控制，这样就避免了开发过程透明度和可视性不高的质量管理缺陷。

The dissecting of samples in group2 were difficult. The root of pulmonary artery and ascending aorta failed to be unfolded because fibrous tissue was tough, right and left fibrous trigone were too firm to be solved by hand. Cardiac muscle fibers couldn't be stripped along myofibrillar trajectory since they were prone to break because of their friability.

组2的心脏解剖困难，表现为纤维组织坚韧，游离肺动脉非常困难；徒手无法松解左、右纤维三角，肺动脉和主动脉根部的游离非常困难；心肌纤维坚硬、质脆，解剖时容易断离成碎块，无法沿纤维走行方向剥离。

We have battled against the odds in a province that has become increasingly violent.

我们对在一个争夺日益激烈省的可能性。