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equivalent counterparts
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  “equivalent counterparts”译为未确定词的双语例句
     Then,we consider the integrable (2+1)dimensional M(modified)HF model, and give the corresonding geometrical equivalent counterparts,such as the (2+1)-dimensional nonlinear Schrodinger equation and the coupled (2+1)-dimensional integrable equations,through the motion of Minkowski space curves endowed with an addi-toional spatial variable.
     之后进一步讨论可积的(2+1)维M(修正的)HF模型,首先用延拓结构理论对该模型进行分析,并通过赋予在闵氏空间中运动的空间曲线新的空间变量y,得到(2+1)维非线性薛定谔方程以及成对的(2+1)维可积方程。
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     It is a very basic, single-chain protein with molecular weight about 14 kD. It shares 33% sequence identity with bovine pancreatic RNaseA and has structurally equivalent counterparts for the two histidines and one lysine that comprise the catalytic residues for ribonucleolytic activity.
     它是由123个氨基酸组成的分子量约为14kD的单链碱性蛋白质,与牛胰核糖核酸酶有33%的同源性,两个组氨酸和一个赖氨酸残基组成了血管生成素核糖核酸酶活性中心。
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     Meanwhile, criteria such as bandwidth are provided for systems without proper equivalent counterparts.
     对于不能用低阶系统等效的飞机提出诸如带宽准则等相应判据。
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  equivalent counterparts
Compositionally, these communities have equivalent counterparts in later Jurassic stages.
      


Aircraft short term response is a crucial element of piloted vehicle flying qualities.This paper consolidates and offers six criteria for evaluation short term pitch response of low attack angle basing on the resent foreign research.The equivalent system approach is still available and new criteria based on it are developed. Meanwhile, criteria such as bandwidth are provided for systems without proper equivalent counterparts.There are strengths and weaknesses for each criterion depending on aircraft...

Aircraft short term response is a crucial element of piloted vehicle flying qualities.This paper consolidates and offers six criteria for evaluation short term pitch response of low attack angle basing on the resent foreign research.The equivalent system approach is still available and new criteria based on it are developed. Meanwhile, criteria such as bandwidth are provided for systems without proper equivalent counterparts.There are strengths and weaknesses for each criterion depending on aircraft classification and flight phase. All six criteria are used to rate and predict the aircraft handling qualities.

飞机纵向短周期运动是影响其飞行品质的关键因素。根据国外近年来所进行的研究,综合、归纳出六种适用于小迎角飞行的短周期运动飞行品质标准。基于等效系统的控制期望参数(CAP)等准则依然适用,并作了增补;对于不能用低阶系统等效的飞机提出诸如带宽准则等相应判据。这六种准则各有其侧重点和适用范围,较全面地反映了飞机短周期运动特性,共同完成对飞行品质的评判和预估。

The physical and mathematic model of electric power steering system with three lumped masses was studied by dynamics analysis and control theory, and the general block-diagram of the system was established; the outer loop property of the system was analyzed, then the general block-diagram was transformed into its equivalent counterpart, and steering control system was designed according to the system requirement; the transfer function of controlled plant, the block-eiagraph, Bode plot and Nyquist plot...

The physical and mathematic model of electric power steering system with three lumped masses was studied by dynamics analysis and control theory, and the general block-diagram of the system was established; the outer loop property of the system was analyzed, then the general block-diagram was transformed into its equivalent counterpart, and steering control system was designed according to the system requirement; the transfer function of controlled plant, the block-eiagraph, Bode plot and Nyquist plot of the open loop system and the stability of the system were studied, and the testbed test of the system was carried out. It is pointed that the block-diagraph may be expressed by a two-loop diagraph with an inner loop including a feedback channel of back electromotive force and an outer one, back electromotive force may be ignored when a fast proportional-integral(PI) controller in inner loop was used, the gain and phase margin of the system are negative without phase compensation, the system is unstable, while phase compensation may stabilize the system. Analysis result indicates that a lead corrector with phase compensation around low frequency resonance is an effective method to stabilize the system and restrain the system vibration. 1 tab, 13 figs, 10 refs.

采用动力学与控制理论,研究了具有3个集中质量的电动助力转向系统的物理和数学模型,建立了总体结构图,在对外环特性进行分析的基础上,对总体结构图进行等效变换,根据系统要求对控制系统进行了设计,研究了控制对象的传递函数、控制系统的结构图、开环系统的Bode图、Nyquist图以及系统的稳定性,并进行了台架试验。研究发现控制系统的结构图可以表示为内、外两环结构,内环包含了反电动势的反馈通道,采用快速比例积分(PI)控制的内环,可以忽略反电动势,没有进行相位补偿的系统幅值裕度和相位裕度约为负值,稳定性较差,而进行相位补偿后系统的稳定性较好。结果表明在系统低频共振频率范围内采用超前校正,提供相位补偿是解决电动助力转向系统振动和稳定性的有效方法。

 
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