In order to realize speed tracking of Permanent Magnet Synchronous Motor ( PMSM) with uncertain load, the Sliding Mode Control ( SMC) is applied to design tracking controller. 针对永磁同步电机具有不确定负载的情况,利用滑模变结构控制方法设计转速跟踪控制器,来实现转速跟踪期望值。
This dynamometer using permanent magnetic eddy load, without any contact, can avoid the velocity limit of mechanical bearing and coupling. 此测功机采用非接触式加载&永磁涡流加载,可以避免机械轴承和联轴器的速度极限的限制。
In the design, in construction process of the structural calculation of the upper part in the continuous bridge, the permanent load were simulated and calculated. 在设计中,桥梁上部结构的计算着重分析了桥梁在施工过程中,恒载内力的计算。
The performance analyse of concrete wall with permanent shuttering kit under level load 模网混凝土墙体在水平荷载下的性能分析
Research on Permanent Deformation of Asphalt Mixture by Triaxial Repeated Load Test 沥青混合料永久变形的三轴重复荷载试验研究
Study on the Silt Permanent Deformation Prediction Model Test and Theory in Repeated Load 重复荷载作用下粉土永久变形预估模型试验和理论研究
This is to ensure that no permanent strain occurs to the load cell which could affect its calibration. 这是为了确保没有永久应变发生负载细胞,这可能会影响其校正。
Nylon is predominantly used past the useful pressure range of TFE because of its ability to resist permanent deformation ( or creep), and recovery after load. 在TFE有效压力范围内,尼龙以前被广泛的使用,因为尼龙具有抗永久性变形(或蠕变)的能力,并且在负载后能够自行恢复。
Bending and torsion moments can lead to permanent damage to the load cell. 弯曲和扭转会对测压元件造成永久性破坏。
This paper reports the laboratory research of subgrade soils under repeated load applications, including the resilient modulus of subgrade soils, the development of permanent deformation over load accumulation, and the influence of various factors on permanent deformation. 通过路基土在重复荷载作用下的室内实验,研究了路基土回弹变形和累积变形随荷载轴次增长的发展规律以及各种因素对累积变形的影响。
This paper analysis magnitude-frequency characteristics of permanent magnet synchronous motor ( FMSM) with inertia load. 分析了水磁同步电动机带惯量负载情况下的幅频特性。
Study of the Critical Dynamic Stress and Permanent Strain of the Subgrade-Soil under the Repeated Load 重复加载下路基填土的临界动应力和永久变形初探
In the end, the distributed regularities of spatial stresses of the irregular bridges under the permanent load and longitudinal prestressing force are analyzed in this paper. 最后,综合考虑在一期恒载和纵向预应力筋作用下其应力的空间分布情况。
In the research of the bridge load, there are often two kinds of probability models. Permanent load irrelevant to time is often described as random variable model. 在桥梁荷载的研究中,最常选用的有两种概率模型:对于与时间参数无关的永久荷载,一般选用随机变量模型;
Bending force and transverse distortion along pile are calculated in three kinds of working conditions, which are single pile under load in construction period, fugacious load domino effect combination in sea wall construction period and permanent load domino effect combination in common using period. 计算了施工期荷载作用下单桩受力、海堤施工期短暂作用效应组合以及正常使用下作用效应的持久组合3种工况下的桩身弯矩和桩身水平变位。
The paper emphatically points out the problems which are often neglected for the selection of the partical safety factor for permanent load in engineering design or programming, and gives out a simple and easy solution. 本文着重介绍了在工程设计中或编程序过程中永久性荷载的分项系数在取值方面容易忽略的问题,提出一种简单易行的解决办法。
This paper mainly deals with the relation between energy efficiency and parameters of rare earth permanent magnet synchronous motor ( REPMSM) operating under periodical load. 本文着重论述了在周期性负载下,稀土永磁同步电动机效率与参数之间的相关性。
The paper proves the necessity that increasing permanent load effect control combination in new "Load code for the design of building structures" by a real instance and drives out the method how to discriminate the most disadvantageous load effect combination. 以实例证明新荷载规范增加由永久荷载效应控制组合的必要性,并推导出简化判别最不利荷载效应组合的方法。
Discussion on the Calculation Method of Item Coefficients of Normal Permanent Load and Active Load 标准永久荷载和活荷载分项系数计算方法探讨
Meanwhile supplying applications to dead zone Bang-Bang-PI Multi-control algorithm in permanent torque load armature current and exciting current control. It simulates the whole system with MATLAB. The design achieves expected results. 同时给出了带死区的Bang-Bang-PI复合控制算法在励磁电流控制中的应用,并结合复合控制算珐,用MATLAB进行了仿真,取得了令人满意的结果。
How to Select the Partical Safaty Factor of Permanent Load in Engineering Design 工程设计中永久荷载分项系数的正确取用
One of the most important standards to measure a cable-stayed bridge safety and quality is whether the permanent load inner force is reasonable. 斜拉桥成桥恒载内力分布是否合理是衡量桥梁性能安全的重要标准之一。
The permanent magnet synchronous motor is a nonlinear and strongly coupled system with the load torque variation for the complex ocean environments. 同时,永磁同步推进电机为非线性强耦合系统,其负载转矩受到多变海洋环境的影响也时刻发生着改变。
After deboned, the faceplates occurred the permanent bending deformation and elastic buckling in the vertical main direction of compression load, and the foam core happened the shear failure and permanent plastic deformation. 上下面板和泡沫夹芯脱胶分离后,面板主要垂直于压缩载荷的方向发生弹性屈曲和永久的弯曲变形,泡沫夹芯在冲击损伤的附近发生剪切失效和永久的塑性变形。
The result shows that the permanent settlement due to the traffic load is mainly contributed by the superficial layer of the subgrade and reduces quickly along with the increase of the depth. As a result, it is effective to reinforce the superficial layer of the soft subgrade. 计算结果发现,交通荷载下地基的长期沉降主要由浅层土的压缩而引起,并且随着深度的增加迅速降低,所以对软土地基浅层土体进行加固处理是很有效的。
With the improvement of permanent magnet coupler driving performance, driven load capacity can be enhanced and energy transfer efficiency can be increased which reduces eddy current heating of the conductor plate. 改善永磁磁力偶合器的驱动性能,首先可以提高永磁磁力偶合器驱动负载的能力,其次也可以提高永磁磁力偶合器能量传递效率,减少导体盘涡流发热。
Additional permanent deformation induced by traffic load mainly post-construction settlement and differential settlement, will greatly influence the pavements in the forms of cracking and rut. 交通荷载作用下路基土体将产生附加变形,主要表现为工后沉降及不均匀沉降,进而影响到交通工程在实际使用中的性能及寿命。
As the single-phase permanent ground fault occurred, fault line could run for two hours with load. 单相永久接地故障发生后,故障线路可以带负荷运行两个小时。
The cable tower is the primary load-carrying member and an important component of cable-stayed bridge. Almost all of the mobile load and permanent load of cable-stayed bridge pass through the cable tower down to the tower pier and foundation. 索塔是斜拉桥的基本承重构件和重要组成部分,斜拉桥的活载和恒载几乎全通过索塔传递到下部的塔墩和基础。