查询词典 system variable

Comparing with the equation of common machine tools, this equation has three characteristics: It includes the variable frequency driver's energy loss;The variable frequency driver's no-sine voltage wave causes mechanical pulse losses in mechanical driving system;Equivalent palstance of main driving system is of uniform continuity.

该方程相对于普通机床功率平衡方程，具有变频器自身存在较大的能量损耗、变频器输出的非正弦波形电压带来的电气谐波损耗和机械传动系统的机械脉动损耗、主传动系统当量角速度具有一致连续性等三个重要特点。

In this system,the VVVF(variable voltage variable frequency) control method based on magnetic flux trajectory is applied.In the system,it is the target for the magnetic flux linkage polygon to be greatly approximate to the ideal magnetic flux circle.Considering such limitations as the low speed torque ripple,high speed real time and the working frequency of switching element,through the subsection synchronization control method by applying different numbers of magnetic flux linkage polygon for different frequency range,the perfect precision specifications for speed can be obtained.

系统采用基于磁通轨迹法的他控式变频调速方案，以磁链多边形尽量逼近理想磁通圆为目标，并考虑低速转矩脉动、高速实时性和开关元件的工作频率限制等约束条件，通过采用分段同步控制方式，在不同的频段采用不同的磁链多边形边数，使系统获得了优异的转速精度指标。

In addition, the VK45DE is outfitted with a variable length air induction system and Continuously Variable Valve Timing Control System to enhance the engine's power delivery and operation efficiency.

此外，VK45DE配备有一个可变长度的进气系统和连续可变气门控制系统提高发动机的动力和工作效率。

The presented diagnosis approach was validated by induction motor variable voltage and variable frequency control system as well as permanent magnet synchronous motor field-orientation vector control system.

为保障诊断的有效性和可靠性，提出采用开关信号上升沿延时的方法来避免因IGBT开通和关断延迟造成的误诊断，并给出延时时间的确定方法。

Both NSX engines are equipped with Acura's patented Variable Valve Timing and Lift Electronic Control VTEC(TM , a Variable Volume Induction System, direct ignition and a computerized Programmed Fuel Injection system pioneered in Formula One racing.

NSX的发动机都配备了Acura的专利的可变气门正时和升程电子控制，变容感应系统，直接点火和电脑程序控制燃料喷射的系统率先在一级方程式赛车。

Based on variable mass system mechanics theory, the robotic system is regarded as a variable mass object.

基于变质量系统力学理论，将这一类爬壁机器人系统看作变质量物体。

In Chapter four, the stability problem of the nonlinear open-loop control system is discussed by the concept of input-output stability. The L〓 stability is defined, the relationship between the L〓 norm of output variable and the input variable is proven firstly, and the sufficient condition for the stability of open-loop system , the H〓 norm of the n-th order frequency response function decreasing by n!

本章给出了非线性控制系统L〓稳定性的定义，首次严格证明了输出变量的L〓范数与输入变量的L〓范数之间的一个重要的关系式，并得到了一个开环系统L〓稳定性的充分条件，即n阶广义频率响应函数的范数〓应按n！

Introduced the proportional variable pump system used in injection molding press and the working principal and structure of proportional variable pump , described the major futures and benefit and the developing prospect of the system.

介绍了比例变量泵系统在注塑机上的应用情况，以及比例变量泵的结构和工作原理，阐述了比例变量泵系统的主要优点和注塑机应用比例变量泵系统的效益与发展前景。

In this thesis , I use relevant theories of regional economics,system engineering methord ,and industry"s economics, and adopt research methords of gange analysis , facts analysis and comparison analysis to make objective and just appraisal on the actural conditions of each country regional economic development of Hubei province on the basis of setting up the comprehensive appraising system of country economic strength ; and I divide all coutry of Hubei into three classes more developed country , the undeveloped country and poor country and analyse the reasons for forming three kinds of different development levels, then I set up plural linear regression model to announce the role of every influence factor in Hubei country economic development by regarding economic development level as depentent variable and regarding the seven influence factors(stock of the capital .industrial structure,government"s efficiency ,economic vigor ,technological innovation ability,agricultu ral innovationability, agr icultural resource and export-oriented degree of economy )as independent variable.

本文运用区域经济学、计量经济学、产业经济学的相关理论，采用规范分析、实证分析、比较分析相结合的研究方法，在建立县域经济综合实力评价体系的基础上，对湖北省各个县域经济发展的实际情况作出了客观公正的评价，并把湖北各县域分为三大类：较发达县、欠发达县和贫困县，且对形成三类县域不同发展水平的原因进行了分析。然后以经济发展水平为因变量，以资本存量、产业结构、政府效率、经济活力、技术创新能力、农业资源禀赋和经济外向度等七个方面的影响因素为自变量，建立多元线性回归模型，揭示各影响因素在湖北县域经济发展中的作用。

The method is based on a variable structure to control the SVC, wherein, the variable structure control method comprises two aspects of the unbalanced load equalization compensation and the parameter control of a PI controller, wherein, the unbalanced load equalization compensation adopts the SVC compensation susceptance computational method which is based on the synchronous rotation reference coordinate transformation of a virtual symmetrical three-phase system; meanwhile, in the stabilization control of the system voltage, the ant colony algorithm optimization method is adopted to real time adjust and to optimize the parameter kp and ki of the PI controller.

本发明公开了一种静止无功补偿器的不平衡补偿和蚁群优化方法，基于变结构对静止无功补偿器SVC进行控制，其中变结构控制方法包括不平衡负荷平衡化补偿和PI控制器的参数控制两个方面，其中不平衡负荷平衡化补偿采用基于虚拟对称三相系统的同步旋转参考坐标变换的SVC补偿电纳计算方法；同时在系统电压稳定控制时，采用蚁群算法优化方法，对PI控制器的参数kp、ki进行实时调整、寻优。

The witness also told the jury at the Royal Courts of Justice in London that he saw a paparazzo fighting with a member of the public who was trying to stop him taking pictures in the minutes before the emergency services arrived.

他还告诉在伦敦皇家法庭的陪审团，在急救服务到来之前，他当时看见一个狗仔队正和一群阻止他拍照的人打架。

The entire N／C program on a tape is made up of an accumulation of these successive data blocks.

纸带上的整个数控程序由这些连续数据单元连接而成。