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Sliding Mode-Based Active Disturbance Rejection Control for 3D Overhead Crane with Payload Hoisting/Lowering

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Sliding Mode-Based Active Disturbance Rejection Control for ...

局部破损下考虑摩擦的直齿轮系统多状态啮合-碰撞动态特性研究

第35届中国过程控制会议

作者： Shourui Wang wuyin jin Haonan Zhang An Wang Wenke Chen School of Mechanical and Electronical Engineering Lanzhou University of Technology

Based on the sliding mode control(SMC) and active disturbance rejection control(ADRC) theory, the controller design problem for a three-dimensional(3D) overhead crane with payload hoisting/lowering is investigated in this work. Firstly, a virtual controlled model is constructed by combining the actuated displacement state with the underactuated angle state, considering the complex situation of the overhead crane coupling multi-state. Secondly, a linear extended state observer(LESO) is designed based on the reconstructed virtual model, and a SMC method is proposed based on the observer output, with the stability of the closed-loop system being proved using Lyapunov theory. Finally, the effectiveness of the proposed control method is verified through the execution of three sets of simulation conditions.

关键词： 3D overhead crane sliding mode control active disturbance rejection control payload hoisting/lowering

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西北工业大学学报 2024年第3期42卷 531-539页

作者：漆鹏飞石建飞靳伍银陈国龙兰州理工大学机电工程学院甘肃兰州730050

局部破损是直齿轮常见的故障之一,影响齿轮传动的平稳、安全运行。轮齿碰撞不可忽略,揭示局部破损下齿轮系统啮合-碰撞动态特性对提高齿轮系统安全稳定运行尤为重要。基于齿轮啮合原理和能量耗散碰撞接触力模型,考虑齿背接触的瞬时性,... 详细信息

局部破损是直齿轮常见的故障之一,影响齿轮传动的平稳、安全运行。轮齿碰撞不可忽略,揭示局部破损下齿轮系统啮合-碰撞动态特性对提高齿轮系统安全稳定运行尤为重要。基于齿轮啮合原理和能量耗散碰撞接触力模型,考虑齿背接触的瞬时性,建立局部破损下齿面啮合模型和齿背碰撞模型。根据齿轮副接触状态及受力环境,对局部破损下多状态啮合-碰撞行为进行分类,建立局部破损下渐开线直齿轮系统啮合-碰撞离散动力学模型,探讨局部破损对齿轮系统啮合刚度和载荷分配的影响特征。分析局部破损下接触力变化机理,定义Poincaré映射截面,研究载荷系数和啮合频率变化下系统混沌、分岔特性。研究发现,局部破损影响接触力单双齿啮合区域,降低齿轮局部承载能力;较大载荷抑制齿背碰撞,较小载荷诱发周期运动共存现象和齿背碰撞;较大和较小啮合频率诱发齿背碰撞;混沌运动和周期运动共存现象诱发齿背碰撞,局部破损影响多周期共存现象,加剧系统运动的复杂性。揭示主动轮局部破损下考虑能量耗散的齿轮系统动力学模型及非线性振动机理,探究齿背碰撞发生条件。研究成果为故障齿轮系统非线性动力学建模和分析提供了新的方法和思路。

关键词：齿轮系统局部破损齿背碰撞多状态啮合非线性动力学

离子推力器溅射沉积物防剥离放电室的设计及激光选区熔化增材制造研究

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推进技术 2024年第5期45卷 259-266页

作者：李建鹏靳伍银赵以德代鹏张兴民张文涛兰州理工大学机电工程学院甘肃兰州730050 兰州空间技术物理研究所真空技术与物理重点实验室甘肃兰州730000

为了抑制离子推力器寿命末期由溅射沉积导致的放电室膜层剥落物脱落,首先采用理论研究和试验的方法开展了剥落物抑制放电室的设计,基于零件结构和增材制造特点开展了零件工艺性分析并提出解决方案,实现了放电室增材制造,开展了离子推力... 详细信息

为了抑制离子推力器寿命末期由溅射沉积导致的放电室膜层剥落物脱落,首先采用理论研究和试验的方法开展了剥落物抑制放电室的设计,基于零件结构和增材制造特点开展了零件工艺性分析并提出解决方案,实现了放电室增材制造,开展了离子推力器放电室溅射物防脱落性能测试。结果表明:放电室内表面设计纹理化结构排布形式为正六边形,凸起部分外接圆直径0.5 mm,间距0.25 mm,高度0.5 mm时可降低溅射沉积物脱落概率及碎屑尺寸,通过分层旋转扫描,选择激光功率425 W,扫描速度1200 mm/s工艺参数可实现大尺寸薄壁、具有复杂微小特征钛合金回转体制造,通过结构拓扑,镂空点阵结构、工艺参数和空间摆放位置优化,成型零件壁厚一致性偏差小于0.10 mm。放电室优化前后推力器性能稳定,各工作点关键参数相对误差小于4%。本文的研究为离子推力器放电室溅射沉积物脱落抑制方法和复杂结构的激光选区熔化增材制造成型提供了工程应用方案。

关键词：离子推力器放电室溅射沉积物选区激光熔化抑制

基于特征调节器和双路径引导的RGB-D室内语义分割

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计算机应用研究 2024年第5期41卷 1594-1600页

作者：张帅雷景生靳伍银俞云祥杨胜英浙江科技学院信息与电子工程学院杭州310023 兰州理工大学机电工程学院兰州730050 浙江鼎立实业有限公司浙江丽水321400

针对室内场景图像语义分割结果不精确、显著图粗糙的问题,提出一种基于多模态特征优化提取和双路径引导解码的网络架构(feature regulator and dual-path guidance,FG-Net)。具体来说,设计的特征调节器对每个阶段的多模态特征依次进行... 详细信息

针对室内场景图像语义分割结果不精确、显著图粗糙的问题,提出一种基于多模态特征优化提取和双路径引导解码的网络架构(feature regulator and dual-path guidance,FG-Net)。具体来说,设计的特征调节器对每个阶段的多模态特征依次进行噪声过滤、重加权表示、差异性互补和交互融合,通过强化RGB和深度特征聚合,优化特征提取过程中的多模态特征表示。然后,在解码阶段引入特征交互融合后丰富的跨模态线索,进一步发挥多模态特征的优势。结合双路径协同引导结构,在解码阶段融合多尺度、多层次的特征信息,从而输出更细致的显著图。实验在公开数据集NYUD-v2和SUN RGB-D上进行,在主要评价指标mIoU上达到48.5%,优于其他先进算法。结果表明,该算法实现了更精细的室内场景图像语义分割,表现出了较好的泛化性和鲁棒性。

关键词：室内语义分割特征调节器双路径协同引导 RGB-D特征

Effects of electromagnetic induction and noise on the regulation of sleep wake cycle

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Science China(Technological Sciences) 2019年第12期62卷 2113-2119页

作者： jin wuyin WANG An MA Jun LIN Qian School of Mechanical and Electronical Engineering Lanzhou University of TechnologyLanzhou 730050China Department of Physics Lanzhou University of TechnologyLanzhou 730050China Editorial Department of Journal of Lanzhou University of Technology Lanzhou 730050China

As an exploration of electromagnetic induction effects on homeostatic regulation of sleep wake cycle, a magnetic flux term coupled with membrane current is proposed as an equivalent induction current act on a physiologically-motivated mathematical model, to study the effects of electromagnetic induction and its noise on the sleep wake cycle. The basic model includes 2 simplified Hodgkin-Huxley type neurons connected via glutamate(Glu) synapses, one of which additionally contains hypocretin/orexin(Hcrt/ox) as the functionally relevant co-transmitter. The numerical results suggest that when a constant current(DC) stimulus is applied to the model, the average fire frequency of the Hcrt/ox neuron could be modified from gamma to delta frequency with increased the intensity of electromagnetic induction, but the local Glu neuron transforms active into sleep ***, the homeostatic regulation function has better robustness to electromagnetic induction and its noise than the current or conductance noise, even there is a similar stochastic resonance phenomenon. For the circadian current input case, the time of wake up is delayed and fall asleep is advanced when the electromagnetic induction and its noise is considered. Furthermore, the effects of electromagnetic noise on the regulation is not significant, but only to inhibit the neuronal discharge activities and change the time of wake up and fall asleep of the Glu neuron, characterized by the sleep duration is slightly prolonged with increasing the strength of noise intensity.

关键词： electromagnetic induction sleep wake cycle noise neural model

Photonic phase transition in circuit quantum electrodynamics lattices coupled to superconducting phase qubits

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Science China(Physics,Mechanics & Astronomy) 2014年第11期57卷 2092-2097页

作者： LIU YiMin jin wuyin YOU JiaBin Department of Physics Shaoguan University School of Mechanical & Electronical Engineering Lanzhou University of Technology Center for Quantum Technologies and Physics Department National University of Singapore3 Science Drive 2117543Singapore

A hybrid quantum architecture was proposed to engineer a localization-delocalization phase transition of light in a two-dimension square lattices of superconducting coplanar waveguide resonators,which are interconnected by current-biased Josephson junction phase *** find that the competition between the on-site repulsion and the nonlocal photonic hopping leads to the Mott insulator-superfluid *** using the mean-field approach and the quantum master equation,the phase boundary between these two different phases could be obtained when the dissipative effects of superconducting resonators and phase qubit are *** good tunability of the effective on-site repulsion and photon-hopping strengths enable quantum simulation on condensed matter physics and many-body models using such a superconducting resonator lattice *** experimental feasibility is discussed using the currently available technology in the circuit QED.

关键词： hopping resonator waveguide junction engineer currently insulator enable photonic condensed

Dynamics of electric activities in neuron and neurons of network induced by autapses

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Science China(Technological Sciences) 2014年第5期57卷 936-946页

作者： QIN HuiXin MA Jun jin wuyin WANG ChunNi Department of Physics Lanzhou University of Technology College of Mechano-Electronic Engineering Lanzhou University of Technology

The effect of autapse on adjusting the membrane of potentials of neuron is described by imposing a time-delayed feedback on the membrane of neuron in a close loop type,and the Hindmarsh-Rose(HR)neuron under autapse is ***,the electric activity of single HR neuron under electric autapse and chemical autapse is *** is found that quiescent neuron is activated due to appropriate time delay and feedback gain in the autapse,and the autapse plays an important role in waking up *** parameter region for periodic,chaotic activity of neuron under autapse is calculated in a numerical way,and transition from spiking to bursting is observed by increasing the feedback gain and time delay ***,the collective electric activities of neurons in a ring network is investigated and abundant electric activities are observed due to the competition between the autapse and the time-delayed coupling between adjacent neurons in the network,and time delay in coupling between neurons also plays an important role in enhancing synchronization in the network.

关键词： time delay bifurcation Lyapunov exponent neuron network

基于改进YOLOv4-Tiny算法的机械零件识别

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机械设计 2024年第7期41卷 61-65页

作者：杨一帆靳伍银薛文亮王浩浩兰州理工大学机电工程学院

为实现机械零件的精准快速识别,文中提出了一种基于改进的YOLOv4-Tiny算法的机械零件识别方法。该方法融合了注意力机制和K-means++聚类算法,采用CSPDarknet53-Tiny网络作为主干网络,并将卷积注意力机制模块(Convolution Block Attentio... 详细信息

为实现机械零件的精准快速识别,文中提出了一种基于改进的YOLOv4-Tiny算法的机械零件识别方法。该方法融合了注意力机制和K-means++聚类算法,采用CSPDarknet53-Tiny网络作为主干网络,并将卷积注意力机制模块(Convolution Block Attention Module, CBAM; Global Attention Mechanism, GAM)加在YOLOv4-Tiny主干网络与特征金字塔的连接处及其上采样处,在不影响主干网络的条件下,对每个通道的特征信息重新压缩并提取,过滤掉冗余特征信息,保留重要特征信息,并重新分配权重;再用K-means++聚类算法得到一组与机械零件图像数据集相匹配的先验框参数。试验结果表明,与传统的YOLOv4-Tiny算法相比,改进后的YOLOv4-Tiny算法在保证实时性的前提下,平均召回率和平均准确率分别达到99.43%和99.41%,可以准确检测并定位机械零件图像的位置。

关键词： YOLOv4-Tiny算法机械零件识别 CBAM GAM K-means++聚类算法

Dynamics of spiral wave in the networks of neurons induced by local ion channel poisoning

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Dynamics of spiral wave in the networks of neurons induced b...