Results 11 to 20 of about 10,510 (166)
Research on cloud-edge-terminal collaborative intelligent control of coal shearer based on 5G communication [PDF]
, 2023 The current shearer control system is difficult to deal with the complex working conditions of the underground working face. The realization of the intelligent height and speed regulation control of the shearer is faced with three major technical ...
Yao CUI, Zhuang YE
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Digital twin rapid construction method of a mining hoisting system [PDF]
, 2023 The safe and reliable operation of the hoisting system is very important for the production of the whole mine. Therefore, it is necessary to realize the single-point global visualization and virtual remote cooperative linkage control of the mining ...
Juan WU +3 more
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Experimental Research on the Thermodynamic Performance of Heat Pump in Solar-assisted Air-conditioner with Water Heater [PDF]
, 2011 The research presents a solar-assisted air-conditioner with water heater in which solar water heater and heat pump air-conditioner are combined.The performance of heat pump in the new system is experimentally investigated.The performance of heat pump ...
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全球能源互联网, 2019 35kV交流汇集是目前海上风电场集电系统的通用集电方案。随着对海上风场单位成本降低的追求和技术的发展，海上风机单机容量越来越大。然而，由于35kV海底电缆热极限和通流能力的限制，单机容量的增大使得单根海缆上可连接的风机数目随之减少。随着海上风电场规模的扩大和单机容量的增加，如果仍采用35kV交流集电方案，海底电缆的数目势必增加，电缆投资及相应工程费用和难度也将增大。据此，提出了66kV交流集电方案，并基于一组典型案例，对35kV和66kV海上风电交流集电方案进行了技术经济性比对 ...
蔡蓉 +4 more
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, 2021 针对主从微创外科手术机器人同一主手控制不同手术器械在相同开合角度下的夹持力安全问题，研究了手术器械末端执行器的夹持力，建立了一种求解末端夹持力的数学模型。所建立的模型考虑了钢丝绳与导向轮之间的非线性摩擦、指部与腕部的运动耦合以及钢丝绳在导向轮上的蠕动变形对夹持力的影响，得到了在相应开合角度下电机电流与手术器械末端执行器夹持力之间的映射关系；同时，对缝合针所受夹持力进行了受力分析，得到末端执行器对缝合针的夹持力以及末端执行器对缝合针的拉拔力与电机电流之间的关系。通过Matlab对夹持力模型进行仿真研究 ...
刘芬, 杜南星, 杨世明, 桑宏强
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水电科技, 2019 文章是根据垂直轴风力发电系统的特征，设计一套基于定子无铁芯轴向磁通永磁发电机的垂直轴风力发电系统，系统模拟变风速运行下，系统输出稳定的交流电压和频率。整套发电系统成本低，功能丰富，工程实用性强，易于实现独立微网运行。
慧君 刘
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Two-degree-freedom internal model control for current loop of small rotational inertia PMSM [PDF]
, 2011 为改进小转动惯量永磁同步电机电流动态响应性能,建立考虑旋转反电动势和逆变器环节的永磁同步电机电流环三阶数学模型,以该数学模型为基础,设计小转动惯量永磁同步电机电流环二自由度内模控制器。并针对该电流控制系统的鲁棒性能与内模控制器参数、反馈滤波器参数都相关的问题,引入新的反馈滤波器,使两参数分别调节系统的动态跟踪性能和鲁棒性能。详细分析该内模控制方法下系统参数敏感度和负载对电流动态性能的影响。最后通过仿真和实验,表明该方法有助于提高小转动惯量永磁同步电机电流动态响应性能,且参数调整简单明确。In order
彭侠夫, 蒋学程
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Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Low conductivity, slow ion‐diffusion, and limited reactive sites are common problems in electrocatalysts and electrode materials. In this study, a complex NiTe–CoTe heterojunction with abundant Te vacancies embedded in N, P, and F co‐doped hollow carbon nanorods (NiTe1−x–CoTe1−x/NPFC) was fabricated via a simple ionic liquid‐assisted ...
Mingjie Yi +7 more
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Dianci bileiqi, 2020 良好的接地系统对于风电机组的正常运行至关重要。基于风机接地圆环的不等电位模型研究雷电流波头时间与入地点、雷电流幅值、土壤击穿场强、土壤电阻率等因素对风电机组接地系统雷电冲击特性的影响规律以及多年冻土地区通过对接地网敷设垂直接地极的散流效果。结果表明:雷电流经风机接地圆环中心注入时具有更好的散流效果,雷电流波头时间越短,接地导体的电感效应越强烈,风机冲击接地电阻越大;随着雷电流幅值的增加,土壤的火花效应得以加强,风机接地圆环面积越小,冲击接地电阻降低越明显;土壤临界击穿场强越小 ...
姜龙杰 +5 more
doaj
A precise two dimensional tracking servo system based on CANopen bus [PDF]
, 2016 在航空航天、民用、军事领域都起到重要作用的双自由度转台是一种复杂的集光机电一体化的设备，整体设备的精度和性能将直接受其性能的影响。因此，如何同时获取良好的动态性能、较小的体积重量、足够的旋转扭矩以及较小的噪声振动是本文亟需解决的问题。 本文根据中波红外光谱分析技术和长波红外成像双波段结合的红外光谱仪设备技术要求，设计了双自由度转台。该转台采用美国COPLEY公司的CANPCI卡作为CAN通讯卡，两台COPLEY驱动器分别作为主机与从机直接驱动作为执行机构的两台交流伺服电机，实现两个自由度上的运动 ...
欧阳琪楠
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