抗干扰

In this system ,the common APD transformer is replaced by a cheap VPF transformer with high performance , Whle the K style thermoelectric couple is selected as measuring component ,and the cold-end is compensated by its environment temperature measured by integrated temperature sensor AD5901 Hence the accuracy and the capacity of anti - disturbance are greatly improved.

该系统利用廉价高性能的VPF 变换器取代通常的APD 转换器，选用K型热电偶作为检测元件，用集成温度传感器 AD590 测量冷端环境温度进行冷端补偿，从而大大提高了系统的精度和抗干扰能力。

In order to improve ability of anti-jamming, nowadays output of many measure-control systems' sensor is three thready difference signal and differ voltage range. Commonly, this signal is transacted by complex circuit , then it is collected. In this way, hardware cost of system is increased and precision of system is reduced.

现在很多测控系统为了提高抗干扰的能力，传感器输出信号多为3线制的差分信号，而且电压范围也不同，通常采用的方法是把差分信号通过复杂电路进行处理后再进行数据采集，这样不仅增加了硬件成本，还使系统的精度降低。

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

It aims for high transmission rate and high throughput, and it combines OFDM which has the strong ability of preventing interference with MIMO which has the advantages of high channel capacity.

以高速率、高吞吐量为目标，该技术综合了正交频分复用技术强抗干扰的特性，和多输入多输出技术高信道容量的优势。

It is helpful for the study and usage of the technique of torpedo anti-countermeasure.

为鱼雷抗干扰技术的研究和使用提供了科学的决策依据。

Finally, we implement the transversal anti-jamming filter in FPGA.

最后，将设计横贯式的抗干扰滤波器以FPGA来实现，并测试其结果。

This paper proposed a fixed-point transversal adaptive filter and a fixed-point lattice adaptive filter for the application in GPS anti-jamming system.

在本论文将提出定点数的横贯式适应性滤波器与定点数的格式适应性滤波器，将它们应用在抗干扰的系统中。

Wi山a PID con—troller,it may lead to large overshoot even oscillation,then the steady state and dynamic state performance wil be Worse.

本文提出一种模糊PID控制器，它结合了PID控制和模糊控制的优点，具有较好的自适应和抗干扰能力。

In fact, digital simulation experiment in fuze can be done for unnumbered times, which is helpful to making technical innovations in fuze.

无线电引信的干扰与抗干扰数字仿真可以无数次地反复进行引信实验，从而为引信的技术改造、技术创新提供了很好的实验手段。

On the basis of voltage comparator, the circuit is composed of resistances, diodes and other devices which make the hysteresis voltage adjustable, the anti-interference capacity adjustable.

主要介绍了一种抗干扰量可调的模拟量开关电路的设计及应用。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。