Design of Continuous Casting Crystallizer Oscillation Electro-Hydraulic Servo System and Its Improved PID Simulation 连铸结晶器非正弦振动电液伺服系统设计及改进型PID仿真
On the Baosteel continuous casting test platform, the mold friction tests with hydraulic oscillation system were carried out. 基于宝钢板坯连铸试验平台,开展了液压振动下的结晶器摩擦力检测实验研究。
Based on the measurement of the continuous slab caster in Baosteel, some characters of nonsinusoidal oscillation in hydraulic oscillation system of mould were tested and analyzed. 基于宝钢板坯连铸的实测数据,对液压振动装置下结晶器非正弦振动模型相关特性进行了测试和分析。
On a hydraulic oscillator of slab continuous caster, the displacement and other parameters of hydraulic oscillator were measured and the evaluation method of oscillation was studied. 基于板坯连铸结晶器液压振动装置,通过检测结晶器液压振动装置的位移等参数,对振动系统的振动状态的检测与评价进行试验研究。
To solve the low-frequency resonance problem of a non-sinusoidal oscillation system driven by oval gears in continuous casting, the dynamic model of the oscillation system was built up. 为解决椭圆齿轮驱动的连铸结晶器非正弦振动系统的低频共振问题,建立了该系统的动力学模型,推导出动力学方程。
Chaos is one type of continuous and random oscillation in power systems, and is absolutely forbidden. 混沌是非线性系统中各参数相互作用导致的一种非常复杂的现象。
A class of the second nonlinear neutral difference equations with continuous arguments is studied and some sufficient conditions are obtained for oscillation of the bonded solutions. 研究了一类具有连续变量的二阶中立型非线性差分方程,给出了该类方程有界振动的几个充分条件。
Model experiment of meniscus temperature fluctuation during continuous casting mold oscillation 连铸结晶器振动下弯月面处温度波动的模拟实验
The Technique of Continuous Casting Mould Electro-hydraulic Servo Oscillation Control and Its Equipment Study 连铸机结晶器电液伺服振动控制技术及设备
Research on Continuous Casting Mold Oscillation Driven by Electro-hydraulic Servo 电液伺服驱动的连铸结晶器激振系统研究
The following conclusions are obtained: 1. the density wave in an unstable area develops a finite continuous oscillation. 得到如下一些重要结论:1.不稳定区域密度波振荡为有限的持续振荡。
The computer control system and its software are introduced for continuous casting mold oscillation driven by hydraulic servo. 介绍液压伺服驱动的连铸结晶器振动计算机控制系统及其控制软件。
The on-line measurement of the friction force resulted from billet drawing in continuous casting mould has been investigated through measuring power of mould oscillation motor and its principle and error are analysed. 提出通过振动电机功率监测结晶器内拉坯阻力的方法&功率法,对其原理和误差进行了分析。
This paper describes recent trends of continuous casting technology worldwide and its applications such as near net continuous casting, evolutions of mould geometry, hydraulic mould oscillation, electromagnetic stirring as well as soft reduction, etc. 本文介绍了世界连铸技术的发展趋势及近终形连铸、结晶器形状演变、结晶器液压振动、电磁搅拌和轻压下等技术在连铸生产中的应用。
Based on the phenomenon, the mechanisms of improving surface quality of continuous casting billets including high frequency and low amplitude mold oscillation, soft-contact mold electromagnetic continuous casting, hot top mold and so on were analyzed. 基于此温度波动现象,分析了包括高频小振幅振动、软接触结晶器电磁连铸、热顶结晶器等诸多技术改善铸坯表面质量的机理。
Many of the important concepts arised from studying chemical oscillation are all able to be employed in the system of the continuous flowing bottle. Therefore some more abstract concepts about chemical oscillation could be more deeply understood with the help of the comparison between the two systems. 来源于化学振荡研究的许多重要概念都可用于连续流动瓶系统,因此,通过这两个系统的比较可有助于人们更深刻的理解化学振荡中的一些比较抽象的概念。
It is discussed that the oscillation of a class of second order nonlinear partial differential equations with continuous distribution delay under Robin and Dirichlet boundary value conditions. The sufficient conditions for the oscillation of solutions of the equation are obtained by using Green's theorem and calculus techniques. 讨论一类具有连续分布滞量的二阶非线性偏微分方程在Robin,Dirichlet边界条件下解的振动性,利用Green定理及微积分技巧,获得该类方程解振动的充分条件。
In this paper, the theory and application of The Method of General Estimation on the study of the continuous oscillation of nonlinear control system has been introduced in brief. 本文简要介绍了总体评价法在研究非线性控制系统极限环振荡方面的理论和应用。
A method to analyze the dynamics of piecewise continuous system is presented, based on it, the chaotic oscillation of a harmonically forced spring-mass system with friction is studied. 本文提出了一种系统地分析分段连续系统动力学行为的方法。在此基础上,首次采用较完善的摩擦模型研究了强迫振动下,摩擦振子的混沌振荡行为。
And suggests that modern running tread is the natural and continuous process in high speed running and is the extension of leg oscillation. 揭示了现代短蹬技术只是高速跑动中的一个自然连续的过程,是摆腿动作的延续,不需刻意地去作独立蹬伸动作。
By calculating the continuous function and Euler function, we investigate the plasma oscillation in field effect transistors and the instabilities of these waves in different device structures. 通过求解等离子体波的连续性方程以及Euler方程,研究了场效应管中等离子体波的振荡,以及其在各种装置结构中的不稳定性。
The mould oscillation performance has distinct influence on the quality of strands cast. It is favourable for directing continuous casting production and increasing strand quality to control the suitable oscillation parameter. 结晶器的振动性能对铸坯质量影响很大,掌握结晶器振动参数有利于指导连铸生产,提高铸坯质量。
At the same time, we also study the oscillation of the second order nuetral difference equations with continuous arguments, some sufficient conditions for oscillation of solutions are gived. 同时,研究了具有连续变量二阶差分方程的振动性,得到了其解振动的几个充分条件。
The mould is one of the key devices of continuous casting machine, and the yield and quality of continuous casting machine mainly depend on the oscillation of mould. 结晶器是连铸机的关键设备之一,结晶器振动是影响连铸生产质量和产量的重要因素。
Continuous casting mould oscillation is the most basic characteristics of conventional continuous casting. 连铸结晶器振动是常规连铸的最基本特征。
Cubic spline interpolation function has continuous second derivative, which avoids great calculation, acute oscillation, bad numeric stability and insufficient smoothness in section interpolation. So cubic spline interpolation has the capability to fit the sample data perfectly. 三次样条插值函数具有连续的二阶导数,克服了高次插值函数的计算量大、振荡剧烈、数值稳定性差以及分段插值中光滑程度常常不能满足需要的问题,能够更好的拟合样本点。
In multi-machine case, the machine can produce disturbed by the superposition of the impact of transient oscillation and continuous oscillation significantly. 在多机情况下,各机的扰动经叠加也可产生瞬时性大幅冲击振荡和持续振荡。
In the recent years, the domestic steel enterprises are setting up a plenty of continuous casting lines. They adopted the hydraulic technology on the mould oscillation systems. 近年来,国内钢铁企业大规模地建设连铸生产线,并在连铸机结晶器振动中广泛采用液压技术。
With the continuous advancement of the electrophysiological studies of brain network has a clear understanding of the neural network oscillations with oscillation between some of the inherent characteristics of each neuron there is a certain synchronicity characteristics. 随着对大脑神经网络的电生理学研究的不断进步,我们已清楚的了解神经网络上的振荡活动具有一些固有的特性以及各神经元之间振荡存在一定同步性特征。
Combining the wavelet transform and AR model on dynamic pressure for a continuous PSD analysis, high resolution in both time and frequency domain is available according to sudden change processes such as oscillation start, oscillation elimination, flashback and frequency hopping. 小波变换与AR模型功率谱分析结合起来可以对动态压力频率&功率特性分析在时域和频域都取得很高的分辨率,可以帮助更加深入的了解突变过程的动态特性。