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    The Application of Fuzzy Mathematics and Fuzzy Control in Frequency Conversion Output Wave Symmetry Improvement
    模糊数学和模糊控制在变频输出波形对称度改造中的应用
    2. The device of surelite OPO and mirage3000B are analyzed, and some experimental results of the output wave and energy are obtained and discussed .
    2.对两种参量振荡器surelite OPO和Mirage3000B的结构做了剖析,详细地研究了其中的关键技术,对其输出波形、脉宽以及输出能量等特性进行了实验研究,并做了理论分析。
    The essay discussed in detaily the following contents:(1) Described the two kinds of PWM modulation methods of carrier phase-shift in serial units mid-voltage frequency converter, and done simulation to the PWM modulation of carrier level phase-shift and vertical phase-shift ,analysised the output wave forms that under different modulation.
    (1) 详细阐述了单元串联中压变频器两种载波移相的PWM调制方法,分析了各自的优劣,并对载波水平移相和垂直移相PWM调制进行了仿真,分析了在不同调制度下的输出波形。 仿真和系统实验表明,载波水平移相和垂直水平移相PWM调制可以提高等效开关频率,使输出波形电平数增加,减小谐波,改善输出波形
    Comparison anddescription of the two influences are detailed throughillustration and theoretical analyses, then get to importantconclusions: the deviation voltage is in relative with the output current direction in hard-switching inverters while isunassociated in soft-switching inverters, which makes the quite differences in the output wave distortion principle and thecorrection strategies.
    该文的目的在于通过图解和理论分析的方法对这两种影响进行详细的比较和描述,并得出重要结论:硬开关逆变器中产生的偏差电压与输出电流方向有关而软开关逆变器中产生的偏差电压与输出电流无关,使得其输出波形畸变原理和校正策略完全不同;
    The wave output employs two D/A converters (DAC0832) one of which controls the voltage reference of the other converter in order that the peak-to-peak value of the end output wave varies from 0 to 5 volts stepped according 1 volt.
    输出采用双D/A技术,用一片DAC0832控制另一片DAC0832的基准电压,从而使输出波形峰-峰值在0~5V之间能够按1V步进。
    In this circuit, we use many kinds of negative feedback to modify the output wave, which can decrease the distortion.
    采用了多种负反馈回路修正输出波形,使得输出电压波形的失真度很小;
    we selected the specific driving module M57962 as IGBT driver, and designed a circuit to eliminate the surge voltage of IGBT. We also calculated the parameters of the chopping circuit, and measured the output wave figures.
    以M57962L厚膜电路作为IGBT的驱动模块,给出了消除IGBT浪涌电压的解决办法,并对斩波电路的参数进行了简单计算,测量了输出波形
    This thesis set up the mathematics model of coherent optical communication system on the basis of coherent optical communication principle, then we run the simulation and drew some simulated wave forms , such as the wave form of modulating information, DPSK information wave form and DPSK signal wave form , the input wave form of double linear filters, the output wave form by judgement,etc. Thus we verified the exactness of this model and its performance was suitable for the performance demand of coherent optical communication system basically.
    本文基于相干光通信原理,建立了相干光通信系统数学模型,在对系统运行仿真后,得出了一些仿真波形,如调制信息波形、调制后的DPSK信息波形和DPSK信号波形、双线性滤波器输入波形、判决后输出波形等一系列仿真波形,从而验证了该模型的正确性,其性能基本符合相干光通信系统的性能要求。
    The software carries out output wave control, creates digital sinusoidal norm and implements logical control functions of inverter, that is, inverter protecting, monitoring and measurement and so on. The paper analyses the concerned errors.
    软件实现输出波形控制,生成数字正弦基准,实现逆变器逻辑控制功能,即对逆变器的保护、监测和切换进行控制等,并进行了相关误差分析。
    On basis of overcoming these shortcomings, we suggested a theory producing multi-paths SPWM by using vector rotating method that based on CPLD, this method keeps the benefits of the level phase-shift and vertical phase-shift but with simpler calculation and better output wave forms and faster response and better reliability.
    本文正是基于上述缺点,在着力解决水平移相和垂直移相PWM的缺点的基础上,提出了基于CPLD的矢量旋转法产生多路SPWM的理论,该方法不但继承了水平移相和垂直移相的优点,而且具有运算简便、输出波形完美,系统响应速度快、可靠性强等优点。
    The output wave form, current peak amplitude, square wave frequency and on-off ratio of the power source are all adjustable, when used in experiments with Cr-Ni-Fe-plating, it worked well.
    其输出波形、电流峰值、方波频率及通断比均可调节。 在电镀CrNiFe合金的实验中使用情况良好。
    In this kind of oscillators, the combinational operational amplifiers(OAs) are used, the frequency is determined by the central friquency of selection network and not the product of gain-band, This can extend the frequency range, improve the output wave and heighten the frequency stablity.
    在这类(12种)振荡器电路中,采用两个集成运放构成的组合运放,使振荡频率与集成运放增益带宽积无关,而是由选频网络中心频率决定,这有利于扩展振荡频率范围,改善输出波形,提高频率稳定度
    The output wave of transistored MIG power source is square pelsed wave.
    晶体管控制MIG焊电源输出波形为方波脉冲,可实现与脉冲电流同步的1滴/1脉冲熔滴过渡。
    This paper focuses on widely used three phases half bridge voltage inverter,and solution to switching angle of the output wave used selected harmonic elimination technique.
    本文以最常用的三相半桥电压逆变电源为研究对象,给出了其输出波形采用特定消谐技术的数学模型及开关角的解。
    A novel digital single phase PWM generator is presented in this paper. The operation principle,structure diagram and output wave are also introduced,This paper analyses mainly the working process,the structure of the digital single phase PWM genereator.
    提出一种新颖的数字式单相PWM发生器.介绍了它的工作原理、结构框图及发生器的输出波形.重点分析了数学式单相PWM发生器的工作过程和系统构成
    The controllers output wave can meet the requirements of the frequencyconversion speed adjustment system.
    该控制器的输出波形能满足交流变频调速系统的需要
    A sinusoidal wave with a frequency that can change from 0 1Hz to 0 001Hz is generated by a RC oscillator. It is inputted to a 1/2 frequency divider and 1/4 frequency divider,and then respectively give a square wave and a triangular wave. It is proved by the output wave recorded with the X-Y function recorder that the ultra-low frequency signal generator fits well with the experiment requirement
    采用RC振荡器产生 0 1~ 0 0 0 1Hz的超低频正弦波信号 ,经分频电路产生二分频及四分频方波和三角波 ,用同步记录仪记录的输出波形表明 :研制的超低频信号发生器满足实验测量的技术要求。
    The theory and the system design of wave form generator by chip calculator system are discussed. The system can produce sine wave,square wave,triangle wave,zigzag wave and arbitrary user imput wave,can bring about wave form superposition and meat to amplitude and frequency requirements of output wave form.
    阐述了由单片机系统构成的波形发生器的原理和电路设计 ,该系统可产生正弦波、方波、三角波、锯齿波以及由用户输入的任意波形 ,能实现波形的叠加 ,并能使输出波形达到一定的幅度和频率要求
    The UPS System usually adopts PLL(Phase Lock Loop)in the voltage control system,but when the load and power factor varies,the aberration influence induced by the voltage output wave is still not get a good solution.
    目前 ,不间断电源逆变器通常采用锁相环的电压调节控制系统 ,但在负载及负载功率因数变化时 ,输出波形造成的畸变影响仍未得到很好的解决。
    An algorithm and practical output wave form were given.
    给出了一个具体的算法和实现后的电压输出波形
 

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