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学者姓名：杜恒
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Abstract ：
High-speed on/off valve (HSV) is widely used in aviation hydraulic systems due to its excellent response speed and load resistance. However, at high-frequency operating conditions, frequent power switching cycles with high voltages will lead to coil heating, which severely limits the performance of HSV. Reducing the temperature rise while ensuring fast response has been a significant challenge in this field. To address this issue, the heat-separated driving circuit (HSDC) is innovatively applied and optimized to HSV. By introducing an external resistor, HSDC not only reduces the temperature rise but also shortens the response time. To optimize the electrical parameters of HSDC, a multiphysics field model is established using the finite element method, and a multiobjective optimization is carried out. The Pareto front is obtained by NSGA-II algorithm and evaluated by EWM-TOPSIS method. Finally, comparative tests are conducted. The experimental results indicate that compared with the conventional coil driving circuit, the optimized HSDC can significantly improve temperature rise characteristics, reduce the maximum temperature rise by 75.21%, and shorten the time to reach the steady-state temperature by 29.71%. Moreover, the dynamic performance is also improved with a 4.90% reduction in total response time and a widening of the duty cycle adjustable range at low frequencies. These results validate the effectiveness of the proposed design and optimization scheme, demonstrating significant potential in reducing temperature rise and improving dynamic performance.
Keyword ：
Coils Coils Dynamic performance Dynamic performance Electromagnetic forces Electromagnetic forces Force Force Heating systems Heating systems high-speed on/off valve (HSV) high-speed on/off valve (HSV) Iron Iron Magnetic circuits Magnetic circuits multifield coupling multifield coupling multiobjective optimization (MOO) multiobjective optimization (MOO) Optimization Optimization Springs Springs Temperature Temperature temperature rise characteristics temperature rise characteristics Valves Valves
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| GB/T 7714 | Li, Yuzheng , Huang, Xiaojun , Deng, Shaoxian et al. Optimization of Temperature Rise Characteristics and Dynamic Performance of High-Speed ON/OFF Valve Based on Heat-Separated Driving Circuit [J]. | IEEE-ASME TRANSACTIONS ON MECHATRONICS , 2025 . |
| MLA | Li, Yuzheng et al. "Optimization of Temperature Rise Characteristics and Dynamic Performance of High-Speed ON/OFF Valve Based on Heat-Separated Driving Circuit" . | IEEE-ASME TRANSACTIONS ON MECHATRONICS (2025) . |
| APA | Li, Yuzheng , Huang, Xiaojun , Deng, Shaoxian , Huang, Hui , Du, Heng . Optimization of Temperature Rise Characteristics and Dynamic Performance of High-Speed ON/OFF Valve Based on Heat-Separated Driving Circuit . | IEEE-ASME TRANSACTIONS ON MECHATRONICS , 2025 . |
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In lumbar anesthesia surgery, the accurate determination of key parameters such as injection angle and dosage is facilitated by the real-time observation of intrathecal drug distribution. In this study, a non-invasive and visual computational fluid dynamics method was used to simulate drug injections in the "cloverleaf" lumbar thoracic segment with a multiphase mixture model, clarifying the intrathecal unsteady flow behaviors and the drug transport mechanisms. The transport properties of three clinically significant injection angles - 0 degrees, 45 degrees and 60 degrees- were compared, determining the fastest and slowest block onset angles based on drug concentration levels in the thoracic vertebral plane. The calculation results are aligned with clinical practice trends, and it is found that significantly different drug amounts are required for different injection angles, with higher doses necessitated for ultrasound-assisted anesthesia. During anesthesia, a trend of increasing and then decreasing local anesthetic concentrations in each vertebral plane was observed, with the presence of a minimum effective dose of local anesthetic at the target block site. Injecting at the "concave" part of the cloverleaf (45 degrees and 60 degrees) results in greater drug pulsation, faster diffusion and more efficient mixing than injecting at the positive "convex" part of the cloverleaf cross-section (0 degrees). At the L2 vertebral plane, the flow rate and mixing ratios during injection for angles of 0 degrees, 45 degrees and 60 degrees were approximately 1:4:2. Compared with orthostatic 0 degrees injections, 45 degrees and 60 degrees oblique injections resulted in higher drug concentrations in the T12-10 vertebral plane during the pre-transport period, with 45 degrees injections being the fastest. However, over a longer period of time, 45 degrees injections resulted in the lowest drug concentrations in the target block plane (T10), necessitating a higher dose. A faster anesthetic response was produced by 0 degrees injections at the same dose. Valuable insights for the application of appropriate drug dosages in clinical anesthesia practice are offered by the calculations.
Keyword ：
computational fluid dynamics computational fluid dynamics drug transport drug transport injection angle injection angle Spinal anesthesia Spinal anesthesia
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| GB/T 7714 | Li, Yuzheng , Xu, Qiyue , Zhang, Xing et al. Numerical investigation on the differential injection angle effects of intrathecal anesthetic drug delivery [J]. | INTERNATIONAL JOURNAL OF MODERN PHYSICS C , 2025 , 36 (11) . |
| MLA | Li, Yuzheng et al. "Numerical investigation on the differential injection angle effects of intrathecal anesthetic drug delivery" . | INTERNATIONAL JOURNAL OF MODERN PHYSICS C 36 . 11 (2025) . |
| APA | Li, Yuzheng , Xu, Qiyue , Zhang, Xing , Li, Fuqi , Zheng, Ting , Zheng, Chunying et al. Numerical investigation on the differential injection angle effects of intrathecal anesthetic drug delivery . | INTERNATIONAL JOURNAL OF MODERN PHYSICS C , 2025 , 36 (11) . |
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A pump-controlled electrohydraulic servo steering system (PC-EHSSS) is proposed, to accommodate high energy-efficiency steering control of heavy vehicles; whereas, it's prone to steering-angle overshoot under abrupt signals, resulting from systematic low damping, poor dynamic performance, and unknown disturbances. For overshoot inhibition, barrier Lyapunov functions (BLF), were utilized to strictly restrict high-order steering-angle errors within boundaries. Once contravened, the BLF controller would be invalid, especially in complex road conditions with erratic and variable initial steering angles. For faster and better error convergence under any initial angle, the integral sliding mode control-BLF switching strategy was proposed. ISMC quickly constrained state variables to BLF's control domain before BLF took over. Still, based on the backward-iteration approach, BLF triggered "differential explosion" for its virtual control rates iteration when applied in high-order systems. To enhance its engineering applicability, dynamic surface control (DSC) was incorporated, by converting differentiation into algebraic operations. A closed PC-EHSSS experiment platform for heavy vehicles was constructed. The steering-angle overshoot is restrained within 0.73 degrees under a trapezoidal signal, with 31.68% higher steady-state accuracy than DSC, and 28.04% greater energy efficiency than pump-valve-combined-controlled steering at 0.15 Hz, 3T. A low-overshoot, high-precision, and high-efficiency variable-speed PC-EHSSS for heavy vehicles has been developed.
Keyword ：
Efficient and precise Efficient and precise heavy vehicle heavy vehicle inte- gral sliding mode control- barrier Lyapunov function (ISMC- BLF) switching control strategy inte- gral sliding mode control- barrier Lyapunov function (ISMC- BLF) switching control strategy pump-controlled electrohy- draulic servo steering system (PC-EHSSS) pump-controlled electrohy- draulic servo steering system (PC-EHSSS) steering-angle overshoot suppression steering-angle overshoot suppression
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| GB/T 7714 | Du, Heng , Zhuang, Pingting , Feng, Xinyu et al. Novel Energy-Efficient Variable-Speed Pump-Controlled Steering System With Enhanced Barrier Lyapunov Control for Heavy Vehicles [J]. | IEEE-ASME TRANSACTIONS ON MECHATRONICS , 2025 . |
| MLA | Du, Heng et al. "Novel Energy-Efficient Variable-Speed Pump-Controlled Steering System With Enhanced Barrier Lyapunov Control for Heavy Vehicles" . | IEEE-ASME TRANSACTIONS ON MECHATRONICS (2025) . |
| APA | Du, Heng , Zhuang, Pingting , Feng, Xinyu , Zhang, Xiaolong , Li, Su , Wang, Yunchao . Novel Energy-Efficient Variable-Speed Pump-Controlled Steering System With Enhanced Barrier Lyapunov Control for Heavy Vehicles . | IEEE-ASME TRANSACTIONS ON MECHATRONICS , 2025 . |
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The growing demand for energy efficiency, environmental protection in the heavy transportation sector, particularly in large-scale projects, highlights the importance of improving steering systems for vehicles. A pump- controlled electro-hydraulic steering system is proposed, offering significant advantages in energy efficiency under high power. However, it leading to soft speed-load characteristics, reduced circuit stiffness, and compromised performance. To address challenges, an improved back-pressure-controllable BPC-PC-EHSS is introduced, the dynamic and power flow models are established. But it increases power loss, conflicting with the energy-saving objectives. Therefore, back-pressure parameter identification that balances both high performance and low energy-consumption is crucial. The energy-saving boundary is analyzed using the hydraulic conductivity factor, a parallel-input multilayer neural network (PIM-NN) is designed for nonlinear system back-pressure identification. Experimental results show that the proposed system significantly improves steering performance and energy-efficiency with minimal change in pump peak pressure and reduced pressure-vibrations. Specifically, under 6 tons load the error is 1 degrees,which is improved by 55.6 % compared to the non- identification. Compared with valve-controlled and pump-valve systems under same-typical-conditions, significant energy-saving advantages and steering economy are demonstrated. Additionally, the real-world driving hardware environment is reconstructed, it is validated that the total steering input energy is reduced by 76.19 % on the experimental road.
Keyword ：
Electro-hydraulic steering system Electro-hydraulic steering system Energy-efficient parameter identification Energy-efficient parameter identification Heavy-duty multi-axle wheeled vehicle Heavy-duty multi-axle wheeled vehicle Multi-layer neural network Multi-layer neural network Realistic driving simulation Realistic driving simulation Variable-speed pump control Variable-speed pump control
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| GB/T 7714 | Xu, Jun , Du, Heng , Zhou, Shizhao et al. Energy-efficient design and power flow analysis of electro-hydraulic steering systems for heavy-duty wheeled vehicles via parameter identification [J]. | ENERGY , 2025 , 322 . |
| MLA | Xu, Jun et al. "Energy-efficient design and power flow analysis of electro-hydraulic steering systems for heavy-duty wheeled vehicles via parameter identification" . | ENERGY 322 (2025) . |
| APA | Xu, Jun , Du, Heng , Zhou, Shizhao , Wei, Lingtao , Chen, Peiyang , Zheng, Yulan . Energy-efficient design and power flow analysis of electro-hydraulic steering systems for heavy-duty wheeled vehicles via parameter identification . | ENERGY , 2025 , 322 . |
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Electro-hydraulic servo valve is critical control element of hydraulic system in high-end aerospace equipment and operates in prolonged vibration environment. Due to airframe vibration and hydraulic shock, the servo valve is prone to leakage at the sealing end cap, leading to performance degradation and even failure. In this paper, an experimental analysis of servo valve leakage under transverse vibration is conducted, and the mapping relationship between threaded plug loosening and servo valve leakage is investigated. A dynamic model based on the contact pressure distribution between the servo valve and the threaded plug is proposed, and the leakage mechanism of the servo valve is examined from a dynamic perspective. The effects of hydraulic shock and sealing friction on plug loosening are explored, along with the influence of initial preload, vibration frequency, and vibration amplitude on plug preload decay. The results show that the preload decay of the threaded plug under transverse vibration is the primary cause of servo valve leakage, and this decay can be divided into two phases: a nonlinear rapid decline phase and a near-linear steady decline phase, which are influenced by transverse vibration and sealing friction, respectively. In summary, this study provides a valuable theoretical reference for understanding the leakage mechanism of electro-hydraulic servo valves.
Keyword ：
Electro-hydraulic servo valve Electro-hydraulic servo valve Leakage Leakage Threaded plug loosening Threaded plug loosening Transverse vibration Transverse vibration
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| GB/T 7714 | Ren, Tianyu , Yin, Yaobao , Wang, Xinyi et al. Leakage mechanism analysis of electsro-hydraulic servo valve under transverse vibration environment [J]. | ENGINEERING FAILURE ANALYSIS , 2025 , 169 . |
| MLA | Ren, Tianyu et al. "Leakage mechanism analysis of electsro-hydraulic servo valve under transverse vibration environment" . | ENGINEERING FAILURE ANALYSIS 169 (2025) . |
| APA | Ren, Tianyu , Yin, Yaobao , Wang, Xinyi , Yuan, Jiayang , Du, Heng . Leakage mechanism analysis of electsro-hydraulic servo valve under transverse vibration environment . | ENGINEERING FAILURE ANALYSIS , 2025 , 169 . |
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The driving range of multiaxle steer-by-wire vehicles is significantly affected by the consumption of vehicle cornering resistance power (VCRP). This article addresses this issue by proposing a novel energy-saving steering control strategy to effectively reduce VCRP by optimizing slip angle. Initially, a general VCRP model is developed to establish a relationship between VCRP and the slip angles of each tire. Later, an adaptive nonsingular terminal sliding mode control method is proposed to balance control energy and state errors. In addition, an energy-saving steering angle optimization method is proposed based on the VCRP model, which achieves an optimal steering angle configuration by optimizing the slip angle. The efficacy of the proposed control strategy in energy-saving is evaluated by hardware-in-the-loop tests. The experimental results exhibit noteworthy reductions of more than 21% and 45% in VCRP under both high-friction and low-friction conditions of high speed, respectively, compared to the traditional Ackerman steering control strategies while maintaining excellent steering stability.
Keyword ：
Adaptation models Adaptation models Energy-saving steering control Energy-saving steering control Force Force Friction Friction general vehicle cornering resistance power (VCRP) model general vehicle cornering resistance power (VCRP) model Immune system Immune system multiaxle steer-by-wire vehicles (MA-SbWVs) multiaxle steer-by-wire vehicles (MA-SbWVs) Stability criteria Stability criteria Tires Tires Turning Turning vehicle cornering resistance vehicle cornering resistance Vehicle dynamics Vehicle dynamics Video recording Video recording Wheels Wheels
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| GB/T 7714 | Zhang, Xiaolong , Cheng, Qian , Du, Heng et al. A Novel Energy-Saving Steering Control Strategy Based on General Power Model for Multiaxle Steer-by-Wire Vehicles [J]. | IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS , 2025 , 72 (8) : 8440-8450 . |
| MLA | Zhang, Xiaolong et al. "A Novel Energy-Saving Steering Control Strategy Based on General Power Model for Multiaxle Steer-by-Wire Vehicles" . | IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS 72 . 8 (2025) : 8440-8450 . |
| APA | Zhang, Xiaolong , Cheng, Qian , Du, Heng , Wan, Jiawei . A Novel Energy-Saving Steering Control Strategy Based on General Power Model for Multiaxle Steer-by-Wire Vehicles . | IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS , 2025 , 72 (8) , 8440-8450 . |
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The high-speed switch valve (HSV) is affected by the coupling of electric-magnetic-fluid-solid multiple physical fields, resulting in unclear noise variation patterns and inability to determine the direction of noise reduction. In response to these issues, this article first analyzes the relationship between multi effect coupling and noise characteristics of HSVs, and identifies the key factors affecting the noise of HSVs. Secondly, a noise model for HSVs is established. The characteristics of noise generated by mechanical collisions under high-frequency noise are analyzed. Subsequently, the noise variation patterns with different duty cycles at the same frequency are analyzed experimentally. Finally, the influence of key parameters such as collision speed and material on noise is analyzed. The results indicate that as the duty cycle increases, the noise increases. The duty cycle only affects the noise when the valve core is closed. When the opening of the valve port is small, materials with higher elastic modulus should be selected. When the opening of the valve port is large, materials with lower elastic modulus should be selected.
Keyword ：
duty cycles duty cycles High-speed switch valve High-speed switch valve mechanical collision mechanical collision multiple physical fields multiple physical fields vibration and noise vibration and noise
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| GB/T 7714 | Li, Yuzheng , Wu, Yuanliang , Huang, Hui et al. The influencing factors of noise caused by mechanical collision for high-speed switch valve considering multiple physical fields [J]. | INTERNATIONAL JOURNAL OF AEROACOUSTICS , 2025 , 24 (5-6) : 357-380 . |
| MLA | Li, Yuzheng et al. "The influencing factors of noise caused by mechanical collision for high-speed switch valve considering multiple physical fields" . | INTERNATIONAL JOURNAL OF AEROACOUSTICS 24 . 5-6 (2025) : 357-380 . |
| APA | Li, Yuzheng , Wu, Yuanliang , Huang, Hui , Chen, Shaorong , Du, Heng , Chen, Shumei . The influencing factors of noise caused by mechanical collision for high-speed switch valve considering multiple physical fields . | INTERNATIONAL JOURNAL OF AEROACOUSTICS , 2025 , 24 (5-6) , 357-380 . |
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Abstract ：
液压柱塞马达在工作状态下振动噪声剧烈,针对削弱内部声振源和外部壳体结构优化的传统减振降噪方案设计难度大、优化成本高的问题,提出了在液压柱塞马达壳体敷设约束阻尼层的减振降噪方法.进行液压柱塞马达的动力学模型和液压模型耦合仿真,得到液压柱塞马达内部对壳体的振动激励.以振动激励作为载荷,结合强迫响应分析和基于模态声传递向量法的声压仿真,得到马达壳体的模态参与因子和声学板块贡献量,从而精确阻尼层敷设区域.通过对约束阻尼层进行有限元建模分析,研究阻尼层材料参数对振动抑制的影响,选择合适的阻尼层材料.在半消声室内对敷设约束阻尼层前后的液压柱塞马达进行多工况下平均声压级测试.结果表明:在峰值噪声频率下,约束阻尼层能将液压柱塞马达的噪声至少降低2 dB.
Keyword ：
减振降噪 减振降噪 声学板块贡献量 声学板块贡献量 模态参与因子 模态参与因子 液压柱塞马达 液压柱塞马达 约束阻尼层 约束阻尼层
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| GB/T 7714 | 张圳 , 黄惠 , 杜恒 et al. 液压柱塞马达的约束阻尼层降噪研究 [J]. | 液压与气动 , 2024 , 48 (10) : 158-169 . |
| MLA | 张圳 et al. "液压柱塞马达的约束阻尼层降噪研究" . | 液压与气动 48 . 10 (2024) : 158-169 . |
| APA | 张圳 , 黄惠 , 杜恒 , 李雨铮 , 苏俊收 . 液压柱塞马达的约束阻尼层降噪研究 . | 液压与气动 , 2024 , 48 (10) , 158-169 . |
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压力脉动主动抑制是提升数字液压阀控系统控制精度和可靠性的关键技术.然而,目前主动抑制方法在对压力脉动进行抑制时缺乏对其特性的深入理解,导致抑制效果不理想.因此,设计了压力脉动测试试验台,分析了系统中不同位置压力脉动的变化情况,探索了液压泵、高速开关阀对不同位置压力脉动的影响.结果表明:数字液压阀控系统中压力脉动的主要来自于高速开关阀持续开/关引起的水击现象,并且压力脉动的频率始终与阀的开/关频率保持一致.为设计前馈的压力脉动主动抑制系统提供了新思路,同时也为研发更高效的压力脉动衰减器提供了参考.
Keyword ：
压力脉动 压力脉动 数字液压 数字液压 试验分析 试验分析 高速开关阀 高速开关阀
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| GB/T 7714 | 陈福龙 , 杜恒 , 李雨铮 et al. 数字液压阀控系统中压力脉动试验 [J]. | 液压与气动 , 2024 , 48 (10) : 136-142 . |
| MLA | 陈福龙 et al. "数字液压阀控系统中压力脉动试验" . | 液压与气动 48 . 10 (2024) : 136-142 . |
| APA | 陈福龙 , 杜恒 , 李雨铮 , 周时钊 , 李福气 , 马玉山 . 数字液压阀控系统中压力脉动试验 . | 液压与气动 , 2024 , 48 (10) , 136-142 . |
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The internal noise sources of the bent-axis piston motor are close in distance. For example, the distance between the inlet and outlet of the motor valve plate is 38 mm, and the noise sources have the same frequency and multiple frequency phenomenon. The dense and complex noise sources in the bent-axis motor cause difficulties for the spectrum analysis method to accurately identify the same frequency and multiple frequency signals. The maximum resolution of traditional sound intensity measurement is 50 mm, which cannot meet the requirement of identification accuracy of motor internal noise source. Aiming at the problem that the traditional methods are difficult to identify the motor noise sources accurately, this paper proposed a sound intensity measurement method based on compressed sensing. The compressed sensing theory was applied to the high-precision reconstruction of sound intensity image to obtain the high-resolution sound intensity reconstruction image of the motor. Firstly, the noise radiation simulation of the bent-axis motor was carried out to obtain the characteristics of its external surface sound field. Then, based on the sound intensity image for the motor, a compressed sensing frame applied to the motor sound field was designed to obtain the sound intensity cloud image of the motor with high precision. Finally, the feasibility of the compressed sensing theory to improve the identification accuracy of motor noise source was verified by comparing the traditional acoustic intensity measurement with the compressed sensing acoustic intensity measurement. The results show that the identification scale of motor noise sources are improved from 70mm to 30mm by the sound intensity measurement method based on compressed sensing, which improves the accuracy of motor noise sources identification and realizes the high precision location of motor noise sources. © 2024 South China University of Technology. All rights reserved.
Keyword ：
Acoustic field measurement Acoustic field measurement Acoustic fields Acoustic fields Acoustic intensity Acoustic intensity Acoustic intensity measurement Acoustic intensity measurement Acoustic noise Acoustic noise Compressed sensing Compressed sensing Image reconstruction Image reconstruction Spectrum analysis Spectrum analysis
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| GB/T 7714 | Chen, Shumei , Luo, Yuanming , Huang, Hui et al. Application of Compressed Sensing in Sound Intensity Imaging of Bent-Axis Motor [J]. | Journal of South China University of Technology (Natural Science) , 2024 , 52 (4) : 68-76 . |
| MLA | Chen, Shumei et al. "Application of Compressed Sensing in Sound Intensity Imaging of Bent-Axis Motor" . | Journal of South China University of Technology (Natural Science) 52 . 4 (2024) : 68-76 . |
| APA | Chen, Shumei , Luo, Yuanming , Huang, Hui , Wu, Ganyong , Huang, Qiufang , Qian, Cong et al. Application of Compressed Sensing in Sound Intensity Imaging of Bent-Axis Motor . | Journal of South China University of Technology (Natural Science) , 2024 , 52 (4) , 68-76 . |
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