数学模型

In this paper, the mathematic model of a. c. excited generator system based on field-oriented control is established first. The simulated results operating at no-load and steady state are agreed with the test waveforms by means of 2. 8kW ACEG prototype developed by Harbin institute of large electrical machinery and Zhejiang University.

本文建立了磁场定向控制交流励磁发电机系统的数学模型，并采用哈尔滨大电机研究所和浙江大学联合研制的2.8kW ACEG系统实验原理样机，测试。。。

The nitriding process of a large-scale crank shaft made from 35CrMo steel is simulated using non-linear FEM for the different supporting situations based on the above-stated visco-elastic mathematical model and measured data.

由于大型曲轴形状非常复杂，本文针对四种不同的支撑方式，用三维非线性有限元法结合上述粘弹性数学模型和实测数据模拟计算了35CrMo大型曲轴气体渗氮过程变形情况。

The mechanism concerning diameter reduction of wire rope is discussed, the mathematical models concerning abradant wear, oxidate wear, fatigue wear are set up separatly.

分析了钢丝绳直径缩细的机理，对磨料磨损，氧化腐蚀磨损、疲劳磨损建立了相应的数学模型。

The mathematical models of minimal object function and tabu mutation operator for the performance index of error absolute value time integral were established.

该方案建立了误差绝对值时间积分性能指标的最小目标函数和禁忌变异算子的数学模型。

It is found that, with the increasing in the packed saturator's working pressure, the outlet air can be easier saturated, but the absolute humidity of the outlet air decreases.

应用该数学模型分析了压力变化对加填料饱和器传热传质的影响，同时讨论了沿加填料饱和器高度方向的传热传质过程。

A.signal transmission system model compatible with single sideband system, double sideband system and vestigial sideband system is obtained in this paper.

本文研究单边带、双边带、残留边带信号传输系统的一个统一的数学模型，这种模型具有较为精练而明确的形式。

In this paper, the basic mathematical model was derived by means of two methods, the first is the twostar positioning algorithm in celestial navigation theory and the second is based on the gyro dynamics theory. The results from these two methods are identical and therefore are correct. The latitude is equal to the elevation-angle of the polar gyro. The course is the ideal output from the sensor fitted to the outer gimbal. The longitude is a function of the equator gyro's azimuth and elevation angles.

本论文用天文导航中的双星定位法和经典的陀螺力学原理两种方法建立了ESGM的基本数学模型，并且得到一致的结果，说明所建模型是正确的，即载体的纬度等于极轴陀螺主轴相对水平面的高度角，载体的航向等于极轴陀螺外环轴上角度传感器的理想输出，载体的经度是赤道陀螺的方位角和高度角的函数。

Based on normal automatic rifle with shooter standing firing without support andprone firing with support, the dynamics characteristics of man—weapon system werestudied, the physical and mathematical models of the above two firing gestures wereestablished.

本文以常规结构自动步枪的立姿无依托抵肩射击和卧姿有依托抵肩射击系统为研究对象，对人枪系统的动力学特性进行了系统的分析，建立了两种射击状态的物理模型和数学模型。

Firstly, the control of reentry phase and the model of RCS jets are presented. Then the flight control system is divided into two subsystems based on the time-scale separation principle. The fast states subsystem corresponds to the three body-axis angular rates, the slow states subsystem controls the angle-of-attack, sideslip angle and the rate of the bank angle about the velocity vector. Lastly, the proportional-plus-integral feedback is designed to increase the system robustness.

首先，分析了SRLV再入段的数学模型，并给出了反作用推力控制系统的控制模型；其次，将非线性动态逆方法与时标分离原则相结合，考虑飞行器姿态控制系统的外环角回路的慢变特性和内环角速度回路的快变特性，独立设计了两个回路的控制律；最后，为了增强系统的鲁棒性，分别在两个回路中引入了比例－积分反馈，有效地抑制了干扰力、力矩和非线性对消带来的逆误差。

Mathematical model of the vibration system described by the second Lagrange Equation was established.

根据所建立的振动力学模型，运用第二类拉格朗日方程建立了草方格机器人的数学模型。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。