本文介绍了超低速、宽高速、高精度电液伺服马达的性能指标、结构特点、设计方法和试验研究。
This paper describes performance indexes, structure features, design method and experimental investigation of electrohydraulic servo motor with super-low-speed, wide speed control and high precision.
试验结果表明，发动机在高、低速区的最佳进气涡流强度是不同的。
Results show that there are different optimum swirls in different ranges of diesel engine operating condition.
本文拟研究DFR理论与DFR试验方法以及该方法在低速磁浮列车走行机构主要构件的疲劳可靠性寿命分析中的应用技术。
The research work of this thesis intends to study the DFR theory and test method with its application in the running frame of low-speed magnet driven aerotrain.
本文通过废气旁通阀、进气谐振系统和增压补偿器的试验，分析了改善车用增压柴油机低速性能的方法。
Some measures for improving the low speed performance of vehicle turbocharged diesel engine are proposed by the experiments of exhaust bypass valve resonant intake system as well as boost compensator.
基于传统的风洞试验支撑设备，设计了用于低速风洞测量大攻角模型支架干扰的组合支撑设备。
Based on traditional support system in wind tunnel testing, the combination support system measuring support interference on high angles of attack model in low speed wind tunnel was designed.
本文简要地阐述了具有后缘控制面的二元机翼模型主动颤振抑制低速风洞试验的全过程。
This paper gives a brief description of the whole process of the low-speed wind tunnel test for active flutter suppression of a two-dimensional wing model with trailing edge control surface.
试验表明，用五相混合式步进电动机二相低速同步电动机运行，其运行性能优良。
The test results indicate that the operating performance of the five-phase hybrid stepping motor when it operates as a two-phase low speed synchronous motor is good.
沥青瓦抗风性试验仪由风源、试验平台和控制系统三大部分组成，它是一种民用开式低速风洞。
The tester, a kind of civil low speed wind tunnel in nature, consists of wind generator, test platform and control system.
试验表明，采用排气调谐腔能有效改善发动机在中低速区的性能。
Experimental results show that the exhaust tuning chamber can improve the engine performance at the middle low speed range.
对两种材料体系和铺层的复合材料层合板进行低速冲击后压缩强度试验，以研究低速冲击后层合板的压缩破坏机理。
The compressive failure tests were carried out on the composite laminates after low velocity impact damage to study compressive failure mechanisms of laminates after low velocity impact damage.
试验结果表明，发动机在高、低速区的最佳进气涡流强度是不同的。
The effects of different intake swirl ratio on the performances and exhaust emissions of diesel engine were investigated based on the experiment data.
数值试验表明，该算法具有分辨壳内低速层、高低速薄互层结构和一定的抗噪能力。
Numerical tests suggest that the method has the capability of resolving low-velocity layers, thin alternating high and low velocity layers, and noise suppression.
通过模型试验测量大深度载人潜水器低速大漂角运动时所受到的非线性水动力。
The nonlinear hydrodynamic forces on a deep manned submersible at a low forward speed and large drift angles are determined by a model test.
在发动机试验台上，用CB-466燃烧分析仪对四气门汽油机低速低负荷燃烧压力循环变动进行了试验研究。
The cyclic variation of the combustion pressure in the cylinder of a four-valve gasoline engine was analyzed at low speed and light load with the CB-466 combustion analyzer on the engine test-bed.
通过野外试验和调查，查明了垦东地区的表层是一种低速泥层与高速沙板层的互层结构。
Field study reveals that the near surface structure in Kendong, Shengli Oilfield consists of interbeds of low velocity mud formation and high velocity sands.
用低速风洞测力试验和襟翼处绕流的PIV测量试验研究锯齿形格尼襟翼在不同偏角下的增升效益。
Force and PIV local flow measurements were conducted in a low speed wind tunnel to study the effectiveness of serrated Gurney flap at different deflections.
本文采用落锤冲击试验机对铝蒙皮整体中空夹层复合材料进行了低速冲击试验。
This paper presents experimental investigations on low-velocity impact response of hollow integrated sandwich composites with aluminum skin by using drop-weight method.
鉴于风洞试验已扩展到更高的速度范围，因此有必要将原著《风洞试验》一书进行修订，并分编为《高速风洞试验》和《低速风洞试验》两部出版。
The extension of the field of wind tunnel testing into the higher-speed regimes has made it advisable to revise Wind Tunnel Testing into low-and high -speed coverages .
试验结果表明发动机低速时配气机构噪声主要由气门间隙敲击引起的，而高速时主要由气门落座时撞击引起的。
Test result indicates that the main noise source is the valve clearance impact under the condition of low speed, while the main source is valve-seating impact under the condition of high speed.
基于传统的风洞试验支撑设备，设计了用于低速风洞测量大攻角模型支架干扰的组合支撑设备。
A "Separating model and support (SMS) method" for measuring support interference is proposed according to the analysis of the support interference for vehicle model wind tunnel tests in this paper.
并应用美国NACA低速叶栅试验结果确定流入角和落后角，设计中控制扩散因子和气流折转角。
The inlet flow angle and diviation angle were confirmed which was applied to low cascade experiment result of American NACA, and controlled diffuser factor and flow deflection angle in design.
介绍一种用于森林保护科研试验的低速风洞的构造、性能和设计原理。
A type of low speed wind tunnel used in research on forestry protection and its structure, function and principle of the design is introduced.
与北京控股有限公司长沙国防科技大学等单位联合研制开发了我国第一条中低速磁悬浮试验线；
With the organization such as University of science and Technology of National Defence of Changsha, it jointly developed the first magnetic suspension test-line of Low-speed in our country;
与北京控股有限公司长沙国防科技大学等单位联合研制开发了我国第一条中低速磁悬浮试验线；
With the organization such as University of science and Technology of National Defence of Changsha, it jointly developed the first magnetic suspension test-line of Low-speed in our country;
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