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学者姓名：林谢昭
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Abstract ：
为正确评价挖掘机工作装置在作业过程中的动态性能,需要准确模拟工作装置在挖掘过程中所受的载荷变化以及铲斗的装料过程.在RecurDyn中构建了工作装置的刚柔耦合模型,并与基于离散单元法的土壤模型进行双向协同仿真.结果表明,结合离散单元法的刚柔耦合仿真能提供更符合真实工况的动态变化数据,能正确地反应挖掘全过程中斗杆和动臂的强度/刚度的动态变化,避免了传统计算只取个别特征位姿的不足.仿真得到的挖掘阻力比传统解析解大约38％,所确定的工作装置危险姿态也与现国标中的构型略有差异.
Keyword ：
刚柔耦合 刚柔耦合 工作装置 工作装置 挖掘阻力 挖掘阻力 离散单元法 离散单元法
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| GB/T 7714 | 徐庆港 , 林谢昭 . 基于DEM与MFBD双向耦合的反铲挖掘机工作装置分析 [J]. | 机械设计与制造 , 2025 , 407 (1) : 231-235,239 . |
| MLA | 徐庆港 等. "基于DEM与MFBD双向耦合的反铲挖掘机工作装置分析" . | 机械设计与制造 407 . 1 (2025) : 231-235,239 . |
| APA | 徐庆港 , 林谢昭 . 基于DEM与MFBD双向耦合的反铲挖掘机工作装置分析 . | 机械设计与制造 , 2025 , 407 (1) , 231-235,239 . |
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Accurate engineering modeling of flour is often required for the calibration of its contact parameters in flour conveying systems. In this study, a typical calibration of contact model parameters was proposed to consider the effects of cohesion between flour particles and particle size, according to the static and dynamic angle of repose. Hertz-Mindlin with Johnson-Kendall-Roberts (JKR) contact model was also selected using the particle scaling theory. The orthogonal simulation tests were carried out to implement the sensitivity and variance analysis of the contact parameters using the discrete element method (DEM) model. The result showed that there were the most significant effects of JKR surface energy, the powder-powder coefficient of rolling friction, and the powder-steel coefficient of static friction on the static angle of repose. Since the contact parameters were calibrated only by static angle of repose, the cross-effects of multiple parameters were verified as well. Different combinations of contact parameters produced a similar effect of static angle of repose. Furthermore, five sets of contact parameters were selected to obtain a unique set of parameter values as the candidates. Their simulation from the static angle of repose was the closest related to the test. Then the dynamic stacking was further studied. The flour was filled in a cylindrical container with a transparent bottom and stainless-steel side. In the tests, the cylindrical container was set as 100 mm in diameter and 30 mm in height and then rotated around the axis at the given speed. The camera was used to record the dynamic angle of repose, which was defined as the maximum tilt angle between the slope and the horizontal plane before the powder collapsed. The contact parameters calibrated by the dynamic angle of repose were also verified under the condition of a single filling rate and a single rotational speed. Therefore, the dynamic angle of repose was further calibrated at the filling rates of 0.2 and 0.4, respectively, while the rotational speeds of 30, 40, 50, and 60 r/min. Optimal contact parameters were achieved for the flour with a powder-powder coefficient of restitution of 0.6, a powder-powder coefficient of static friction of 0.2, a powder-powder coefficient of rolling friction of 0.1, a powder-steel coefficient of restitution of 0.6, a powder-steel coefficient of static friction of 0.6, a powder-steel coefficient of rolling friction of 0.5 and a JKR surface energy of 0.12 J/m2. The dynamic angle of repose after DEM calibration was the closest to the test. The calibration with the dynamic angle of repose under various conditions effectively reduced the uncertainty of the calibration. After that, a rectangular container test was designed to verify the accuracy of the contact parameters. Among them, the flour was poured into a cube container with a side length of 100 mm, where the top surface of the assembly of flour was kept flat, and then the cabin lid of the container was lifted away, leading to the powder naturally flowing out of the container. The ratio of the flour mass remained to calculate the total mass in the container. There was a minimal relative error between the numerical simulation with the calibrated parameters and the measurement from the test. The DEM contact parameters of flour were improved in the reliability, simplicity, and feasibility of calibration. The finding can also provide a strong reference for the DEM parameters calibration of powdery materials in engineering applications. © 2024 Chinese Society of Agricultural Engineering. All rights reserved.
Keyword ：
Calibration Calibration Containers Containers End effectors End effectors Finite difference method Finite difference method Particle size Particle size Particle size analysis Particle size analysis
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| GB/T 7714 | Chen, Shuo , Jiang, Lijian , Lin, Xiezhao et al. Calibration tests for the contact parameters of flour particle using discrete element method [J]. | Transactions of the Chinese Society of Agricultural Engineering , 2024 , 40 (11) : 69-76 . |
| MLA | Chen, Shuo et al. "Calibration tests for the contact parameters of flour particle using discrete element method" . | Transactions of the Chinese Society of Agricultural Engineering 40 . 11 (2024) : 69-76 . |
| APA | Chen, Shuo , Jiang, Lijian , Lin, Xiezhao , Tang, Xusheng , Liu, Xiaomin , Zhang, Long . Calibration tests for the contact parameters of flour particle using discrete element method . | Transactions of the Chinese Society of Agricultural Engineering , 2024 , 40 (11) , 69-76 . |
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Heavy-duty vehicles with long bodies, a large number of axles and large loads are subject to increasingly high requirements for precise steering technology due to the increasing trend toward energy conservation and intelligent assisted driving as well as variable driving conditions. In this paper, an energy-efficient open circuit variable-speed pump-controlled steering system (OPCEHSSS) adapted for heavy loads is used, but its strong flow output nonlinearity and system nonlinear dynamic behavior greatly impede the steering performance. Therefore, in order to reduce the influence of the flow leakage of the fixed-displacement pump on the system and to ensure that the flow output of the system matches the control model, a mapping model based on the fitting of a two-layer neural network algorithm with a dynamic real-time compensation strategy (FNC) is proposed. In addition, considering the strong robustness of the system even under parameter uncertainty and unknown disturbance, a complex nonlinear mathematical model is established based on OPCEHSSS physical characteristics, and a dual-objective control strategy of steering angle and pressure based on sliding mode control (SMC) is proposed. However, in order to reduce the influence of high-order switching discontinuity on the steering and ensure the fast convergence of the control system, a fast super twisting algorithm (STA) based on double saturation function of the boundary layer is proposed. The experimental results show that the three different controllers can effectively reduce the steering angle error after the introduction of FNC. And in the case of a single axle loaded with 6 tons, the improved new FNC+STA integrated dual-objective control strategy improves the accuracy by 53.16% compared with PID and 40.67% compared with SMC. The steady-state error is maintained within 0.9 degrees, realizing the high-performance steering tracking control of OPCEHSSS for heavy vehicles.
Keyword ：
dual-objective control dual-objective control flow nonlinear mapping and compensation flow nonlinear mapping and compensation Heavy vehicle steering system Heavy vehicle steering system pump control system pump control system steering tracking steering tracking super twisting algorithm super twisting algorithm two-layer neural network algorithm two-layer neural network algorithm
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| GB/T 7714 | Lin, Xiezhao , Xu, Jun , Yu, Jianchao et al. High-performance steering tracking control of open circuit variable-speed pump-controlled steering system for heavy-duty vehicles based on flow nonlinearity compensation [J]. | PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART D-JOURNAL OF AUTOMOBILE ENGINEERING , 2024 . |
| MLA | Lin, Xiezhao et al. "High-performance steering tracking control of open circuit variable-speed pump-controlled steering system for heavy-duty vehicles based on flow nonlinearity compensation" . | PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART D-JOURNAL OF AUTOMOBILE ENGINEERING (2024) . |
| APA | Lin, Xiezhao , Xu, Jun , Yu, Jianchao , Zhang, Xiaolong , Zheng, Yulan , Li, Su et al. High-performance steering tracking control of open circuit variable-speed pump-controlled steering system for heavy-duty vehicles based on flow nonlinearity compensation . | PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART D-JOURNAL OF AUTOMOBILE ENGINEERING , 2024 . |
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针对目前路径规划方法存在的平滑性和效率问题,在JPS算法基础上提出了兼顾平滑性与搜索效率的路径规划方法,并利用多项式进行了轨迹优化。首先,提出2个优化目标对路径序列进行优化处理;然后,对JPS搜索规则进行改进,得到更多有价值的路径,并对每条路径进行平滑处理,再以一定规则进行选择;最后,使用多段高阶多项式对所得路径进行轨迹优化,研究时间分配问题,从而加快迭代效率。通过仿真实验和与其他算法的对比证明了本文方法的可行性和有效性。结果表明,在不同障碍物密度环境下,本文路径规划方法得到了平滑性良好的路径,相对平滑后处理JPS,长度减少了0.48%～1.80%,总转折角减少了16.93%～52.75%,利...
Keyword ：
JPS算法 JPS算法 Lazy-Theta~*算法 Lazy-Theta~*算法 移动机器人 移动机器人 路径规划 路径规划 轨迹优化 轨迹优化
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| GB/T 7714 | 黄健萌 , 吴宇雄 , 林谢昭 . 移动机器人平滑JPS路径规划与轨迹优化方法 [J]. | 农业机械学报 , 2021 , 52 (02) : 21-29,121 . |
| MLA | 黄健萌 et al. "移动机器人平滑JPS路径规划与轨迹优化方法" . | 农业机械学报 52 . 02 (2021) : 21-29,121 . |
| APA | 黄健萌 , 吴宇雄 , 林谢昭 . 移动机器人平滑JPS路径规划与轨迹优化方法 . | 农业机械学报 , 2021 , 52 (02) , 21-29,121 . |
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Abstract ：
针对目前路径规划方法存在的平滑性和效率问题,在JPS算法基础上提出了兼顾平滑性与搜索效率的路径规划方法,并利用多项式进行了轨迹优化.首先,提出2个优化目标对路径序列进行优化处理;然后,对JPS搜索规则进行改进,得到更多有价值的路径,并对每条路径进行平滑处理,再以一定规则进行选择;最后,使用多段高阶多项式对所得路径进行轨迹优化,研究时间分配问题,从而加快迭代效率.通过仿真实验和与其他算法的对比证明了本文方法的可行性和有效性.结果 表明,在不同障碍物密度环境下,本文路径规划方法得到了平滑性良好的路径,相对平滑后处理JPS,长度减少了0.48％～1.80％,总转折角减少了16.93％～52.75％,利用余弦函数进行时间分配加快了轨迹优化的迭代效率,通过实验验证得到了良好的效果.
Keyword ：
JPS算法 JPS算法 Lazy-Theta*算法 Lazy-Theta*算法 移动机器人 移动机器人 路径规划 路径规划 轨迹优化 轨迹优化
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| GB/T 7714 | 黄健萌 , 吴宇雄 , 林谢昭 . 移动机器人平滑JPS路径规划与轨迹优化方法 [J]. | 农业机械学报 , 2021 , 52 (2) : 21-29,121 . |
| MLA | 黄健萌 et al. "移动机器人平滑JPS路径规划与轨迹优化方法" . | 农业机械学报 52 . 2 (2021) : 21-29,121 . |
| APA | 黄健萌 , 吴宇雄 , 林谢昭 . 移动机器人平滑JPS路径规划与轨迹优化方法 . | 农业机械学报 , 2021 , 52 (2) , 21-29,121 . |
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The integration of simple fabricated paper devices with a multiplexing fluid control technology are the keys for extending traditional microfluidic applications to paper-based devices. However, paper devices to date have lacked a method for addressing the integration of complex fluid manipulations. By featuring a scalable and programmable mechanical valve matrix that is actuated by push-pull solenoids, we present a paper microfluidic multiplexing technology for performing biochemical assays in a high degree of autonomy. The technology allows every channel of a paper network to be autonomously addressed and isolated while uses a minimal number of control elements, efficiently reducing its complexity. The technology is implemented in an integrated portable system including a multiplexor controller, a relay matrix, a paper device, on-chip temperature control unit and an image analyzer. Biochemical reaction signals can be acquired and automatically interpreted via a self-built mobile App. A prototype that consists of 8 independent valve lines was demonstrated, allowing multiplexed control of a paper device with 16 operating channels. After thoroughly studying the behaviour of fluid transport in the paper device using both numerical simulation and experimentations, multiplex colorimetric assays of heavy metal samples and glucose in common soft drinks and artificial saliva samples were analyzed. To the best of our knowledge, this is the first demonstration of a simple fabricated paper device integrated with a valve multiplexing technology. The scalability of this integration makes the technology ideally suited for high throughput analysis and holds great potential for progressing large scale integration of paper microfluidics.
Keyword ：
Binary control logic Binary control logic Multiplex colorimetric assays Multiplex colorimetric assays Paper microfluidics Paper microfluidics Programmable valve matrix Programmable valve matrix
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| GB/T 7714 | Jia, Yuan , Sun, Hao , Dong, Hui et al. Scalable and parallelized biochemical assays in paper devices integrated with a programmable binary valve matrix [J]. | SENSORS AND ACTUATORS B-CHEMICAL , 2020 , 321 . |
| MLA | Jia, Yuan et al. "Scalable and parallelized biochemical assays in paper devices integrated with a programmable binary valve matrix" . | SENSORS AND ACTUATORS B-CHEMICAL 321 (2020) . |
| APA | Jia, Yuan , Sun, Hao , Dong, Hui , Wang, Cheng , Lin, Xiezhao , Dong, Dibo . Scalable and parallelized biochemical assays in paper devices integrated with a programmable binary valve matrix . | SENSORS AND ACTUATORS B-CHEMICAL , 2020 , 321 . |
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本实用新型涉及一种便于固定防止滑动的液压升降装置，包括底座，所述底座上侧安装有升降架，底座底部安装有脚轮，升降架顶部安装有载物平台；所述底座侧部固定连接有辅助固定块，辅助固定块上开设有螺纹通孔，辅助固定块的螺纹通孔内穿设有螺杆，所述螺杆下端固定连接有用以支撑在地面上的固定板。本实用新型便于固定防止滑动的液压升降装置移动到指定的位置后，可以利用固定板与地面接触产生的摩擦力对该液压升降装置进行固定，防止其发生移动，保证工作人员的人身安全；同时载物平台的工作面积可以根据需要进行调节，满足不同环境下的使用要求。
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| GB/T 7714 | 林谢昭 , 卢凯 , 郭志杰 et al. 便于固定防止滑动的液压升降装置 : CN201920524625.6[P]. | 2019/4/18 . |
| MLA | 林谢昭 et al. "便于固定防止滑动的液压升降装置" : CN201920524625.6. | 2019/4/18 . |
| APA | 林谢昭 , 卢凯 , 郭志杰 , 施承伟 , 舒月 . 便于固定防止滑动的液压升降装置 : CN201920524625.6. | 2019/4/18 . |
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本实用新型涉及一种洗手池，其特征在于：其中洗手池包括水池和设在水池内向上凸起的放置台，所述水池内设有喷淋机构、导流机构和开关组件，所述喷淋机构包括双头下喷组件、斜喷组件和上喷组件，所述双头下喷组件包括转换头和旋转连接头，所述转换头包括V型叉和连接在V型叉第一端的球形喷头和连接于V型叉第二端的圆柱管喷头，所述V型叉的第三端连接所述旋转连接头，所述旋转连接头为旋转切换阀门，以切换V型叉第三端与V型叉第一端连通或是V型叉第三端与V型叉第二端连通，所述球形喷头为球形状，其上面均匀布满微小喷孔。此发明结构简单，操作简单便捷，具有多种喷头组合，可以全方位清洗物体，能够有效减缓因水流速度过快而引起的溅出。
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| GB/T 7714 | 林谢昭 , 卢凯 , 郭志杰 et al. 洗手池 : CN201920522806.5[P]. | 2019/4/17 . |
| MLA | 林谢昭 et al. "洗手池" : CN201920522806.5. | 2019/4/17 . |
| APA | 林谢昭 , 卢凯 , 郭志杰 , 陈锦达 , 舒月 . 洗手池 : CN201920522806.5. | 2019/4/17 . |
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液压机下横梁是关系到整机几何刚度和制品成型精度的重要零件.为了获得材料最优布置的箱梁结构形式,对横向筋板厚度不同情况下的筋板布置位置进行优化,利用有限元分析与灵敏度分析获得参数化模型,结合最优拉丁超立方设计建立基于径向基神经网络的近似优化模型,用序列二次规划法(NLPQL)求解.结果表明,横向筋板厚度对梁的刚度性能影响最大,当厚度从小到大变化时,筋板的最优位置布置由中间相对集中方式逐渐往均匀分布方式变化.不同厚度的横向筋板对应有着不同的最优布置方式.在保持原刚度不下降的前提下,可将质量减小约12％.
Keyword ：
下横梁 下横梁 参数化建模 参数化建模 布置优化 布置优化 液压机 液压机
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| GB/T 7714 | 林谢昭 , 沈梦安 . 基于Isight的液压机下横梁筋板布置位置优化设计 [J]. | 机械制造与自动化 , 2019 , (4) : 106-109 . |
| MLA | 林谢昭 et al. "基于Isight的液压机下横梁筋板布置位置优化设计" . | 机械制造与自动化 4 (2019) : 106-109 . |
| APA | 林谢昭 , 沈梦安 . 基于Isight的液压机下横梁筋板布置位置优化设计 . | 机械制造与自动化 , 2019 , (4) , 106-109 . |
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为提高机架螺纹连接寿命,运用弹塑性接触有限元方法对拉杆连接螺纹进行强度分析,结合参数化建模,建立考虑牙间均载和应力峰值的多目标优化模型,采用径向基函数(RBF)神经网络方法和带精英策略的非支配排序遗传算法(NSGA-Ⅱ)求解。结果表明:牙侧角约为15°时,牙间轴向载荷分布不均匀率减小13.6%,等效应力峰值减小6.9%,第一主应力峰值减小11.5%。
Keyword ：
多目标优化 多目标优化 有限元分析 有限元分析 螺纹连接 螺纹连接 遗传算法 遗传算法
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| GB/T 7714 | 林谢昭 , 王福振 . 考虑牙间均载的拉杆螺纹连接多目标优化 [J]. | 中国机械工程 , 2017 , 28 (17) : 2024-2028 . |
| MLA | 林谢昭 et al. "考虑牙间均载的拉杆螺纹连接多目标优化" . | 中国机械工程 28 . 17 (2017) : 2024-2028 . |
| APA | 林谢昭 , 王福振 . 考虑牙间均载的拉杆螺纹连接多目标优化 . | 中国机械工程 , 2017 , 28 (17) , 2024-2028 . |
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