查询词典 propulsion

The propulsion control system is one of the four subsystems of theMaglev vehicle. The propulsion control theory with field-oriented control is the key technology of the propulsion control system. In this paper,the characteristics of Maglev vehicle propulsion control system with FOC aredeeply studied and analyzed.

牵引控制系统是高速磁悬浮列车四大子系统之一，基于磁场定向控制理论的牵引力控制又是牵引控制系统的核心技术，本文深入研究和分析了在不同磁场定向控制方式下高速磁悬浮列车的牵引特性。

This paper takes the small fish of Carangiform as the mimetic object. Through the bionics study to the principle of Carangiform"s propulsion, the robofish"s main body mechanism that has two degrees of freedom tail fin and single degree of freedom pectoral fin has designed. At the same time, the parameterized mathematical model of double-hinged propulsion system has established. The kinematics analysis, dynamics analysis to the propulsion process and preliminary hydrodynamics analysis to the tail fin and the pectoral fin have been completed. The dynamic equations to the propulsion system have been established.

本文以鲹科模式鱼类为仿生对象，通过对鲹科模式鱼类游动机理的仿生学研究，设计了两自由度的尾鳍推进机构及单自由度的胸鳍机构的机器鱼机械本体结构，建立了参数化的两关节尾鳍推进模式的数学模型，并对推进过程进行了运动学、动力学分析，建立了推进系统动力学方程，对尾鳍和胸鳍推进的水动力进行了初步分析。

The electrical propulsion system proposed in this article utilizes the advantages of PMSM such as small volume, light weight, small moment of inertia and high effectiveness of operation, high reliability, against the DC electric propulsion system"s defectiveness on structure and asynchronous electric propulsion system"s power defectiveness and inefficiency.

本文设计的PMSM电力推进系统利用了永磁同步电动机体积小、重量轻、转动惯量小、运行效率高、可靠性高等优点，弥补了直流电力推进系统在结构上的固有缺陷以及异步电力推进系统功率因素低和效率低的缺陷。

A diesel propulsion plant in CODAD arrangement, by which the application range of excellent diesel can be greatly extended, is one of ideal ship propulsion modes in this stage, and suitable for propulsion of many warship types.

柴油机并车动力装置能大幅度拓展优质柴油机的功率覆盖范围，从而适用于多种舰船推进，是现阶段比较理想的动力形式之一。

A new bionics propulsion equipment—fishlike flexible tail fin propulsion equipment is brought forward,because there are some problems in present thrusters,such as big noise,low propulsion efficiency in shallow water and evident wake.

本文针对现有船用螺旋桨、泵喷等常规推进器存在噪音大、浅水中船舶推进效率不高以及尾迹明显等缺点，提出一种新型仿生推进装置—仿鱼尾柔性尾鳍推进装置，并据此展开了对单翼板柔性尾鳍和双翼板柔性尾鳍模型的计算和实验研究，本文工作属于鱼类生物流体力学、机械学、材料学和控制技术等多学科交叉的一个新兴研究领域。

Mathematical model、control method、parameter estimation and false tolerance of multiphase permanent magnet synchronous motor electric power propulsion system are studied in this thesis, with the project of "Permanent Magnet Material and 1000kW PMSM Propulsion Motor Technique" and"AC-DC-AC Electric Power Propulsion System Technique"as background, which is important national"The Ninth Five-year Plan"project studied in Advance.

本文是以国家"九五"重点预研项目"永磁材料和1000kW机电一体化永磁同步推进电机技术"为背景并结合课题"交—直—交电力推进系统技术"进行的。

The supervision part includes the generator, ship power station, and the propulsion control system, which makes the students understand the whole process of the ship electrical propulsion, be aware of the working principle and control method of the electrical podded propulsion, and be convenient for teaching and research.

监控部分将船舶电力推进系统中的发电机组、船舶电站、推进控制系统等部分有机的结合起来，使学生在实验室即可了解到船舶电力推进系统的全貌，同时，还可以让学生直观的了解到双吊舱电力推进的工作原理与控制方法，便于进行教学和研究。

The paper introduced the composing, characteristic and development status of ship electrical propulsion system. The paper has a detail introduction of Podding electrical propulsion and point out that the Podding is certain to be the best choice of propulsion method and it has limitless potential.

本文论述了船舶电力推进系统的组成、特点，分析了船舶电力推进的国内外发展状况，详细阐述了最有发展前景的一种推进方式——吊舱式电力推进的结构，优点以及应用发展情况。

In order to realize the ship electric propulsion, the propelling state of the electric propulsion system is studied. A set of inland ship electric propulsion control software is proposed based on ReWorks by the help of the PC/104 hardware platform.

为实现船舶电力推进，通过对电力推进系统的推进状态研究，应用PC/104硬件平台和ReWorks国产嵌入式实时操作系统，设计内河小型船舶电力推进控制软件。

Using the low-thrust propulsion system for the Russian space interceptor as a research object, the mathematical model of the components of the system is employed to analyze the influence of the combustion time lag on the response characteristics of the propulsion system with high-pressure chamber, and to analyze comparatively the computation results of the start and shutdown transients of the lowthrust propulsion system with high and low chamber pressures.

以俄罗斯空间拦截器用的小推力推进系统为研究对象，利用系统各部件的数学模型，分析了燃烧时滞对高压燃烧室推进系统响应特性的影响，对比了小推力高、低室压推进系统起动、关机过程的计算结果。

I'm not an actor. I'm a professor of paleontology.

我不是演员，我是古生物学教授

Spider Network Web site that is a very image of the name.

网络蜘蛛即Web Spider，是一个非常形象的名字。