基于模型预测控制的光储发电系统VSG频率控制方法 [PDF]
全球能源互联网, 2022 随着光伏发电装机规模大幅提升，电力系统转动惯量不断降低，虚拟同步发电机（virtual synchronous generator，VSG）技术被广泛采用以应对日益严峻的电网稳定性问题。为进一步提高VSG技术对系统稳定性的改善作用，提出基于模型预测控制的VSG频率控制方法。该方法首先在同步发电机转子运动方程和逆变器下垂控制方程基础上建立VSG可优化的离散模型，再通过模型预测控制（model predictive control，MPC）预测VSG转子角频率的运动轨迹 ...
李帅虎 +3 more
doaj +1 more source
Research on rotary geosteering drilling technology and equipment in underground coal mine [PDF]
, 2022 In view of the limitations of directional drilling technology and equipment for underground gas drainage in coal mining areas, such as low degree of automation, low drilling ratio of target formation, slow drilling rate of rock formation, and small ...
Chao XU +7 more
core +1 more source
Position domain control technology for six-joint robots [PDF]
, 2022 In the context of the rapid development of intelligent manufacturing, high-precision motion control of industrial robots has attracted increasing research attention.
Ping-jiang WANG +2 more
core +1 more source
考虑风电机组故障穿越特性的电压反复波动机理分析与抑制 [PDF]
全球能源互联网, 2022 近年来，大规模风电汇集系统实际运行中频繁出现电压反复波动现象，具有波动幅度大、波动峰谷值切换速率达秒级的特点，与风能随机性、无功补偿装置动作引起的电压波动现象具有显著区别，运行中多次造成风电机组因连续穿越失败而脱网，严重威胁了电网安全稳定运行。上述现象涉及风电机组故障穿越策略与弱电网功率-电压特性的耦合作用，难以通过传统电力系统电压稳定分析方法直接解释。提出了考虑风电机组低电压穿越特性的系统有功-电压曲线（PV曲线）分析方法，准确刻画波动过程中系统运行点轨迹变化规律，并通过仿真进行了验证。在此基础上 ...
吴林林 +6 more
doaj +1 more source
智能科学与技术学报, 2021 针对非仿射系统的跟踪控制问题，提出一种基于执行依赖启发式动态规划（ADHDP）结构的在线设计方法。首先，考虑一类未知非仿射系统，进行从跟踪控制问题到误差调节问题的转换；然后，设计基于 ADHDP结构的跟踪控制器，并采用在线学习的方式，实现系统控制与执行网络和评判网络的训练同步，使得系统状态能够跟踪期望轨迹；最后，通过一个仿真实例验证所提方法的有效性。
赵慧玲, 王鼎, 任进
doaj
Study on Design of Multiple Columns and Layers Packaging Machines for Pillow Shaped Bags(枕形袋多列多层装箱机的设计) [PDF]
Shipin kexue jishu xuebao, 2014 In order to summarize the characteristics of the composition and the packing process of the packaging machine with multiple columns and layers, the article described the composition and control system, rules of the multiple columns and layers, and ...
ZHANG You-liang(张有良) +5 more
doaj +1 more source
Joint optimization of trajectory and resource allocation for UAV integrated radar and communication system [PDF]
, 2021 For the flexible and efficient area detection and data transmission tasks, the joint optimization of time resource allocation, power resource allocation and the trajectory for UAV (unmanned aerial vehicle) trajectory for airborne IRCS (integrated radar ...
Hui TIAN +4 more
core +1 more source
Study on horizontal completion with composite tubular string in coal reservoir with complex coal structure [PDF]
, 2023 Aiming at the problems such as large deformation difference of coal structure, strong heterogeneity of physical properties, complex coal structure during horizontal drilling, single completion & stimulation technology and so on, a completion technology ...
Baoan XIAN +3 more
core +1 more source
Control Performance Improvement of Cutting and Indentation Equipment in Paper Packing with Machine Vision Technology(机器视觉技术对纸质包装切割压痕设备控制性能的改进设计) [PDF]
Shipin kexue jishu xuebao, 2014 Due to problems of NRG-P type cutting and indentation equipment, a new test method, the machine vision technology, was presented to improve its control performance.
HUO Liang-sheng(霍亮生) +2 more
doaj +1 more source
Mechanism and technical system of ground and underground combined drainage of CBM in “four region linkage” in coal mining area [PDF]
, 2022 In order to better realize the safe and efficient coordinated development of coal and CBM resources in high gassy mining areas, the four regions (planning region, preparation region, production region and coal mined-out region) linkage ground-underground
Changjiang JI +4 more
core +1 more source