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学者姓名：陈淑梅
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Abstract ：
斜轴式轴向柱塞马达内部噪声源距离较近，如马达配流盘进、出油口间的距离为38 mm，且马达噪声源存在同频及倍频现象。斜轴式马达内部密集复杂的噪声源，导致频谱分析方法难以准确识别同频及倍频信号，传统声强测量的最高分辨率为50 mm，无法满足马达内部噪声源的辨识精度要求。针对传统方法难以准确辨识马达噪声源的问题，文中提出了一种基于压缩感知的声强测量方法，将压缩感知理论运用于声强云图高精度重构中，获取马达高分辨率的声强重构图像。首先，通过对斜轴式马达进行噪声辐射仿真分析，获取其外表面声场特性；然后，以马达外表面声强云图为先验信息，设计应用于马达声场的压缩感知框架，获取高精度重构马达声强云图；最后，通过马达传统声强测量与压缩感知声强测量的对比实验验证压缩感知理论对于提高马达噪声源辨识精度的可行性。结果表明，基于压缩感知的声强测量方法将马达噪声源辨识尺度从原来的70 mm提升至30 mm，提高了马达噪声源的辨识精度，实现了马达噪声源的高精度定位。
Keyword ：
压缩感知 压缩感知 声强测量 声强测量 声源高精度定位 声源高精度定位 斜轴式马达 斜轴式马达
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| GB/T 7714 | 陈淑梅 , 罗远明 , 黄惠 et al. 压缩感知在斜轴式马达声强成像中的应用研究 [J]. | 华南理工大学学报(自然科学版) , 2024 , 52 (04) : 68-76 . |
| MLA | 陈淑梅 et al. "压缩感知在斜轴式马达声强成像中的应用研究" . | 华南理工大学学报(自然科学版) 52 . 04 (2024) : 68-76 . |
| APA | 陈淑梅 , 罗远明 , 黄惠 , 吴干永 , 黄秋芳 , 钱聪 et al. 压缩感知在斜轴式马达声强成像中的应用研究 . | 华南理工大学学报(自然科学版) , 2024 , 52 (04) , 68-76 . |
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Magnetorheological dampers (MRDs) are applied to hydraulic systems, which not only improve the underdamped characteristics of valve-controlled cylinder systems, but also help hydraulic actuators to resist high load impact. However, the high power density leads to the complexity of the internal flow channel of the damper, which seriously affects the output accuracy of the damping force. It can lead to the fact that existing dynamics models cannot accurately describe the hysteresis characteristics of the MRD. Therefore, this study proposes a simple and general dynamic model of MRD, which solves the problem that existing models are complex and difficult to invert. Firstly, the hydraulic damping actuator with the series MRD is taken as the research object. Based on the stress-strain hysteresis characteristics under the cyclic constitutive model, the hyperbolic tangent curve is reorganized and normalized. It can accurately describe the yield formation and yield dissipation stages of the hysteresis loop. Secondly, the relationship between the parameters of the dynamic model and the current is obtained according to the mechanical experimental data. Then the inverse model of the MRD is established by using the method of section-backstepping. Finally, in the static experiment, the mean absolute percentage error (MAPE) of the force at different velocity is less than 7.5%; in the dynamic experimental test, the MAPE of the force is 9.7%. The inverse dynamics model is verified to have high tracking performance under both static and dynamic forces. And it also indirectly confirms the effectiveness of the forward model.
Keyword ：
forward and inverse dynamic model forward and inverse dynamic model high power density high power density hyperbolic tangent model hyperbolic tangent model magnetorheological damper magnetorheological damper stress-strain hysteretic characteristics stress-strain hysteretic characteristics
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| GB/T 7714 | Ma, Baizhou , Huang, Hui , Huang, Jiabo et al. A forward-inverse dynamic model for the hydraulic damping(magnetorheological) actuator based on cyclic stress-strain [J]. | SMART MATERIALS AND STRUCTURES , 2024 , 33 (2) . |
| MLA | Ma, Baizhou et al. "A forward-inverse dynamic model for the hydraulic damping(magnetorheological) actuator based on cyclic stress-strain" . | SMART MATERIALS AND STRUCTURES 33 . 2 (2024) . |
| APA | Ma, Baizhou , Huang, Hui , Huang, Jiabo , Lin, Xiufang , Huang, Qiufang , Chen, Shumei . A forward-inverse dynamic model for the hydraulic damping(magnetorheological) actuator based on cyclic stress-strain . | SMART MATERIALS AND STRUCTURES , 2024 , 33 (2) . |
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The current, electromagnetic force, and dynamic displacement of the high-speed on/off valve's (HSV) electromechanical converter under stable working cycle are significantly different from those under the initial movement cycle. This phenomenon determines whether the electromechanical converter can continue to operate stably, and it also leads to temperature rise and high energy consumption over long periods of time. Therefore, in this study, a high-precision model is proposed that can fully analyze the characteristics of the electromechanical converter under multiple motion cycles with the consideration of the effects of eddy current and hysteresis. First, the hysteresis loop of the material is tested, and the Jiles-Atherton hysteresis model is identified based on the test data and verified through experiments. Second, the fundamental reasons for the differences in current and electromagnetic forces between initial motion and stable motion are analyzed. On this basis, a new law of dynamic evolution of electromechanical converters under multiple motion cycles is discovered. Finally, the important influence of hysteresis characteristics and eddy current on the dynamic performance and energy loss of the electromechanical converter under multiple motion cycles is analyzed. The effects of frequency, voltage, and external resistance on the dynamic characteristics and energy loss of electromechanical converters have also been analyzed. The results indicate that as the voltage increases, the response time decreases, but the eddy current loss increases. An increase in external resistance will increase response time but reduce eddy current losses. This study can provide a theoretical basis for further improving the performance of electromechanical converters.
Keyword ：
Eddy current Eddy current Eddy currents Eddy currents electromechanical converter electromechanical converter energy consumption energy consumption high-speed on/off valve (HSV) high-speed on/off valve (HSV) hysteresis hysteresis Soft magnetic materials Soft magnetic materials
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| GB/T 7714 | Chen, Shaorong , Li, Qizheng , Huang, Hui et al. Dynamic Characteristics and Energy Consumption of Electromechanical Converter of High-Speed On/Off Valve Under Multiple Motion Cycles Considering Eddy Current and Hysteresis [J]. | IEEE TRANSACTIONS ON MAGNETICS , 2024 , 60 (3) . |
| MLA | Chen, Shaorong et al. "Dynamic Characteristics and Energy Consumption of Electromechanical Converter of High-Speed On/Off Valve Under Multiple Motion Cycles Considering Eddy Current and Hysteresis" . | IEEE TRANSACTIONS ON MAGNETICS 60 . 3 (2024) . |
| APA | Chen, Shaorong , Li, Qizheng , Huang, Hui , Chen, Shumei , Du, Heng , Li, Yuzheng et al. Dynamic Characteristics and Energy Consumption of Electromechanical Converter of High-Speed On/Off Valve Under Multiple Motion Cycles Considering Eddy Current and Hysteresis . | IEEE TRANSACTIONS ON MAGNETICS , 2024 , 60 (3) . |
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A dynamic vibration absorber (DVA) using magnetorheological (MR) for synchronous stiffness and damping control is detailed in this study. The variable longitudinal vibration frequency of propulsion shafting, which is attributed to a broad spectrum of propeller speed fluctuations, necessitates effective vibration mitigation. Conventional DVAs suffer from limited tunability, which can lead to the failure of optimal resonance, narrowed vibration suppression bandwidth, and potential vibration exacerbation. Thus, a control criterion for optimizing the stiffness and damping parameters is proposed in this study. Firstly, a longitudinal vibration dynamic model for the propulsion shafting system is developed, to determine the acceleration transmissibility and resonance frequency points. Next, a magnetorheological vibration absorber (MRVA) is designed to encompass synchronous controlled stiffness and damping. The mechanical property evaluations and frequency shift tests confirm the absorber's capacity for variable stiffness and damping. A coupled dynamic model that integrates the propulsion shafting system and MRVA is established. A control criterion for the stiffness and damping has been formulated to accommodate the diverse working conditions. The results of the vibration reduction experiments substantiate the efficacy of the proposed control criterion, thus demonstrating the attenuation of acceleration amplitude above 37%, besides, up to 90% has been achieved at specific frequencies.
Keyword ：
Dynamic vibration absorber Dynamic vibration absorber Magnetorheological Magnetorheological Optimal resonance frequency Optimal resonance frequency Propulsion shafting system Propulsion shafting system
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| GB/T 7714 | Duan, Weishi , Huang, Hui , Ma, Baizhou et al. Vibration absorption based on MR with synchronous controlled stiffness and damping for propulsion shafting [J]. | OCEAN ENGINEERING , 2024 , 304 . |
| MLA | Duan, Weishi et al. "Vibration absorption based on MR with synchronous controlled stiffness and damping for propulsion shafting" . | OCEAN ENGINEERING 304 (2024) . |
| APA | Duan, Weishi , Huang, Hui , Ma, Baizhou , Wu, Yuanliang , Chen, Shumei . Vibration absorption based on MR with synchronous controlled stiffness and damping for propulsion shafting . | OCEAN ENGINEERING , 2024 , 304 . |
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Nowadays, many scholars have been studied the normal force of MRF in the uniform magnetic field. However, the research on the normal force of MRF in the non-uniform magnetic field is relatively limited. The non-uniform magnetic field can cause the MRF to generate normal force of different sizes and directions to cope with different working conditions, thus the normal force generated in the non-uniform magnetic field require more attention. In this paper, a theoretical model of the normal force of MRF in the non-uniform magnetic field was developed based on the enhanced magnetic dipole model. The normal force of MRF within a unit area can be calculated based on this theoretical model. However, the magnetic induction intensity is different at different locations of the non-uniform magnetic field, which leads to the normal force generated by the MRF are not accurately calculated. Therefore, it is necessary to use COMSOL to establish the material model of the MCR-302 plate rheometer and MRF to verify the accuracy of the proposed model. Then a flat-plate rheometer was used to test the static normal force of the MRF in the non-uniform magnetic field. Finally, the simulation and experimental data were compared. The results show that the simulation result with the experimental data is a good agreement, which verifies the reliability of the theoretical model. The static normal force of the MRF increases with the increase of volume fraction and magnetic field intensity.
Keyword ：
MRF MRF Non-uniform magnetic field Non-uniform magnetic field Normal force Normal force
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| GB/T 7714 | Xiao, Yufan , Zheng, Jinan , Chen, Shumei . Study on the static normal force of MRF in non-uniform magnetic field [J]. | JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS , 2024 , 599 . |
| MLA | Xiao, Yufan et al. "Study on the static normal force of MRF in non-uniform magnetic field" . | JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS 599 (2024) . |
| APA | Xiao, Yufan , Zheng, Jinan , Chen, Shumei . Study on the static normal force of MRF in non-uniform magnetic field . | JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS , 2024 , 599 . |
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When hydraulic-legged robots move under high loads on irregular ground, they are vulnerable to ground impacts. Vibration affects the motion performance of the robot and damages its mechanical structure. This study aims to improve the properties of vibration absorption and impact resistance of hydraulic-legged robots. Because the traditional MR damper (MRD) has small output in finite volume, a novel MRD with a multistage flow channel (MFC-MRD) can output a large damping force designed. First, an MRD prototype was designed for a mechanical leg's driving joint. Subsequently, the system is analyzed theoretically, and a semi-active control strategy is designed and simulated. Finally, the vibration and impact resistance of the prototype were tested. The experimental results show that in the signal tracking experiment, the maximum overshoot under semi-active control was reduced by 53.0%, and the settling time was reduced by 76.9% compared with the passive control. The impact test reduced the maximum displacement fluctuation by 41.09%, and the buffer time is only 0.24 s.
Keyword ：
compliance control compliance control hydraulic-legged robot hydraulic-legged robot impact resistance impact resistance MR damper MR damper semi-active control semi-active control valve-controlled hydraulic cylinder valve-controlled hydraulic cylinder
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| GB/T 7714 | Huang, Hui , Yang, Xin , Ma, Baizhou et al. Experimental test and analysis of impact suppression for hydraulic-driven leg using a new MR damper with multi-channels [J]. | JOURNAL OF VIBRATION AND CONTROL , 2024 . |
| MLA | Huang, Hui et al. "Experimental test and analysis of impact suppression for hydraulic-driven leg using a new MR damper with multi-channels" . | JOURNAL OF VIBRATION AND CONTROL (2024) . |
| APA | Huang, Hui , Yang, Xin , Ma, Baizhou , Xiao, Lanfang , Chen, Shumei , Li, Yuzheng et al. Experimental test and analysis of impact suppression for hydraulic-driven leg using a new MR damper with multi-channels . | JOURNAL OF VIBRATION AND CONTROL , 2024 . |
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Based on production practice, it is known that the mixing scraper is an important mechanical part that the planetary mixer directly contacts with the concrete. Its structural shape will directly affect the mixing effect of the mixer, and the inclination angle of the mixing scraper is one of the most important factors affecting the mixing efficiency of the mixer. In this paper, based on the discrete element numerical analysis method, a three-dimensional simulation model of the vertical axis planetary concrete mixer is established, and the concrete mixing process is simulated, and the inclination angle of the mixing scraper is optimized based on the simulation results. An automatic precast concrete mixing experiment platform was built, and the simulation results were verified experimentally. The research results show that the experimental data and the simulation results are very consistent, which verifies the accuracy of the discrete element dynamics simulation model. It can be seen from the simulation and experimental results that the mixing efficiency of the mixer is the highest when the inclination angle of the mixing blade is 45 degrees, and the number of collisions between different types of material particles in the mixing tank is the highest.
Keyword ：
inclined angle inclined angle mixing blade mixing blade mixing efficiency mixing efficiency Planetary mixer Planetary mixer structure optimization structure optimization
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| GB/T 7714 | Lu, Wenmin , Chen, Shumei , Zheng, Jinan et al. Optimum analysis of inclined angle of mixing blades in planetary mixer based on discrete element method [J]. | ADVANCES IN MECHANICAL ENGINEERING , 2024 , 16 (8) . |
| MLA | Lu, Wenmin et al. "Optimum analysis of inclined angle of mixing blades in planetary mixer based on discrete element method" . | ADVANCES IN MECHANICAL ENGINEERING 16 . 8 (2024) . |
| APA | Lu, Wenmin , Chen, Shumei , Zheng, Jinan , Fu, Xinyuan , Fu, Guohua , Zhong, Jia et al. Optimum analysis of inclined angle of mixing blades in planetary mixer based on discrete element method . | ADVANCES IN MECHANICAL ENGINEERING , 2024 , 16 (8) . |
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In this paper, an energy recovery type self-sensing magnetorheological dampers (MRD) was proposed, using a damper nested in a piezoelectric ceramic (PZT) stack structure to achieve energy recovery and self-sensing. Firstly, the structure of the damper is designed rationally. Secondly, the MRD-based damping force model is established by combining the characteristics of the damper motion and the flow field distribution principle. Then the piezoelectric material modal is analysed to determine its structural dimensions. Next, a mathematical model of electromechanical coupling between the parallel piezoelectric stack and MRD is established, and the simulation model is established to provide a basis for the study of energy recovery and self-sensing performance. Finally, an experimental platform is built: when the external current is 1.2 A, the output damping force is 680 N, and the damper can achieve vibration energy recovery and output power of 0.43 W under the sinusoidal signal with excitation frequency of 5 Hz, and self-sensing of external vibration excitation through the piezoelectric stack output electrical signal. © 2023 Inderscience Enterprises Ltd.
Keyword ：
electric coupling model electric coupling model energy recovery energy recovery magnetorheological dampers magnetorheological dampers MRD MRD piezoelectric ceramics piezoelectric ceramics self-sensing self-sensing
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| GB/T 7714 | Chen, S.-M. , Ma, B.-Z. , Huang, H. et al. Design and performance analysis of energy recovery and self-sensing MR dampers based on piezoelectric effect [J]. | International Journal of Structural Engineering , 2023 , 13 (4) : 408-425 . |
| MLA | Chen, S.-M. et al. "Design and performance analysis of energy recovery and self-sensing MR dampers based on piezoelectric effect" . | International Journal of Structural Engineering 13 . 4 (2023) : 408-425 . |
| APA | Chen, S.-M. , Ma, B.-Z. , Huang, H. , Chen, C.-L. . Design and performance analysis of energy recovery and self-sensing MR dampers based on piezoelectric effect . | International Journal of Structural Engineering , 2023 , 13 (4) , 408-425 . |
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The hydraulic motor will generate noise in operation and it has fluid-structure coupling and compact internal structure. The sound intensity measurement is difficult to distinguish the noise sources of motor. In this paper, a high-precision localization method for noise sources of bent-axis motor is studied to improve the resolution of the sound intensity images to locate noise sources accurately. Firstly, the structural characteristics of the motor are analyzed, and the sound intensity images are obtained through the experiment. Then the high-resolution optimization method based on compressed sensing is designed according to the characteristics of the sound intensity field. Finally, the sound intensity images with high resolution are constructed. The high-resolution images can distinguish the position of the prominent points, and the error is less than 0.4 dB. The identification distance of noise sources can reach 30 mm, and it breaks through the highest resolution of the traditional sound intensity test. © The Author(s) 2023.
Keyword ：
Bent-axis motor Bent-axis motor Compressed sensing Compressed sensing High-resolution optimization High-resolution optimization Noise source location Noise source location Sound intensity image Sound intensity image
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| GB/T 7714 | Xu, C. , Xiangming, M. , Qinghong, G. et al. High precision localisation of the sources of noise of a bent-axis motor [J]. | Noise and Vibration Worldwide , 2023 , 54 (7-8) : 350-359 . |
| MLA | Xu, C. et al. "High precision localisation of the sources of noise of a bent-axis motor" . | Noise and Vibration Worldwide 54 . 7-8 (2023) : 350-359 . |
| APA | Xu, C. , Xiangming, M. , Qinghong, G. , Hui, H. , Shumei, C. , Heng, D. et al. High precision localisation of the sources of noise of a bent-axis motor . | Noise and Vibration Worldwide , 2023 , 54 (7-8) , 350-359 . |
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Accurately evaluating the mixing efficiency of a planetary concrete mixer is the linchpin of estimating the rationality of the mixer structure, but it is currently difficult to establish a general and systematic evaluation method. This paper proposed a digital method for evaluating the planetary mixer efficiency based on the kinematic model of the mixing blade. The mixing efficiency of two typical symmetrical and asymmetrical planetary mixers was compared based on the digital data computed using the proposed method. An automated concrete mixing platform was established to experimentally validate the digital evaluation method. The results indicated that the asymmetric planetary mixer had higher mixing efficiency than the symmetric mixer. Additionally, the mixing efficiency of symmetric mixer increased about 18% as the angle between the two planetary arms changed from 90 to 45, which was due to the difference in the coverage of the mixing blades on the mixing surface.
Keyword ：
Digital evaluation method Digital evaluation method Kinematics Kinematics Planetary concrete mixer Planetary concrete mixer Trajectory tracking Trajectory tracking
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| GB/T 7714 | Zheng, Jinan , Chen, Shumei , Fu, Xinyuan et al. Digital evaluation of planetary concrete mixer efficiency [J]. | AUTOMATION IN CONSTRUCTION , 2023 , 150 . |
| MLA | Zheng, Jinan et al. "Digital evaluation of planetary concrete mixer efficiency" . | AUTOMATION IN CONSTRUCTION 150 (2023) . |
| APA | Zheng, Jinan , Chen, Shumei , Fu, Xinyuan , Fu, Guohua , Zhong, Jia , Chen, Bishu et al. Digital evaluation of planetary concrete mixer efficiency . | AUTOMATION IN CONSTRUCTION , 2023 , 150 . |
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