The prosthetic socket is the key part connecting the prosthesis and the stump. It needs to be functional, safe, and comfortable at the same time. However, the volume fluctuation of the stump causes the incompatibility between the stump and the socket. This paper designs an adaptive prosthetic socket with rope-driven to fit stump volume fluctuation. The designed adaptive prosthetic socket with constant force characteristic using superelastic shape memory alloy may solve the problem of uneven pressure on the stump due to stump volume fluctuation and adapt stump volume. To obtain a good constant force range, the constant force characteristic of the socket is optimized and validated by finite element analysis. The experimental results show that the constant force mechanism using the C-shaped shape memory alloy sheets can obtain good constant force characteristics, and the socket can apply a constant force to the stump to solve the problem of uneven pressure distribution between the stump and the socket.
{"title":"The design of the adaptive prosthetic socket","authors":"Yinhui Huang, Minghui Wang, Hongliu Yu","doi":"10.3233/jae-220219","DOIUrl":"https://doi.org/10.3233/jae-220219","url":null,"abstract":"The prosthetic socket is the key part connecting the prosthesis and the stump. It needs to be functional, safe, and comfortable at the same time. However, the volume fluctuation of the stump causes the incompatibility between the stump and the socket. This paper designs an adaptive prosthetic socket with rope-driven to fit stump volume fluctuation. The designed adaptive prosthetic socket with constant force characteristic using superelastic shape memory alloy may solve the problem of uneven pressure on the stump due to stump volume fluctuation and adapt stump volume. To obtain a good constant force range, the constant force characteristic of the socket is optimized and validated by finite element analysis. The experimental results show that the constant force mechanism using the C-shaped shape memory alloy sheets can obtain good constant force characteristics, and the socket can apply a constant force to the stump to solve the problem of uneven pressure distribution between the stump and the socket.","PeriodicalId":50340,"journal":{"name":"International Journal of Applied Electromagnetics and Mechanics","volume":"76 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86626746","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This article presents the results of research on the influence of the distorted induction motor supply voltage on two selected indicators (phase trajectories and Poincare maps) of chaotic behavior observed in the stator current of an induction motor. The tests were carried out with the use of the proprietary engine model realized in the ANSYS Electronics Desktop environment.
{"title":"Influence of inter and subharmonics on the chaotic behavior of the stator current waveform in an induction motor","authors":"Piotr Jankowski, D. Hallmann","doi":"10.3233/jae-220204","DOIUrl":"https://doi.org/10.3233/jae-220204","url":null,"abstract":"This article presents the results of research on the influence of the distorted induction motor supply voltage on two selected indicators (phase trajectories and Poincare maps) of chaotic behavior observed in the stator current of an induction motor. The tests were carried out with the use of the proprietary engine model realized in the ANSYS Electronics Desktop environment.","PeriodicalId":50340,"journal":{"name":"International Journal of Applied Electromagnetics and Mechanics","volume":"558 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77153345","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Takuya Kitamura, F. Maehara, T. Kato, Daigo Uchino, K. Ogawa, K. Ikeda, A. Endo, T. Narita, H. Kato
In recent years, ultra-compact electric vehicles have gained increasing interest. These vehicles can easily make turns owing to their compactness, and they have a low impact on the environment. However, exterior road and wind noises have a large impact on occupant comfort in the interior space because an electric motor is used instead of an internal combustion engine. Therefore, an active noise control system using control sound or masking for ultra-compact electric vehicles was studied. To select the sound used for masking, a sound containing 1/f fluctuation, which has a relaxing effect on humans, was investigated. In the study of 1/f fluctuations, various analysis methods for comfort evaluation are used. However, a method of detecting sounds including 1/f fluctuations has not been established and clarified. Thus, a basic study of 1/f fluctuations was performed to select the sound to be used for the masker. Furthermore, brain waves of participants were measured in cases in which participants heard sounds including or not 1/f fluctuation. The results revealed that sounds including 1/f fluctuation of amplitude and frequency helped participants to relax.
{"title":"A study on masking system using 1/f fluctuation to improve comfort in ultra-compact EVs","authors":"Takuya Kitamura, F. Maehara, T. Kato, Daigo Uchino, K. Ogawa, K. Ikeda, A. Endo, T. Narita, H. Kato","doi":"10.3233/jae-220180","DOIUrl":"https://doi.org/10.3233/jae-220180","url":null,"abstract":"In recent years, ultra-compact electric vehicles have gained increasing interest. These vehicles can easily make turns owing to their compactness, and they have a low impact on the environment. However, exterior road and wind noises have a large impact on occupant comfort in the interior space because an electric motor is used instead of an internal combustion engine. Therefore, an active noise control system using control sound or masking for ultra-compact electric vehicles was studied. To select the sound used for masking, a sound containing 1/f fluctuation, which has a relaxing effect on humans, was investigated. In the study of 1/f fluctuations, various analysis methods for comfort evaluation are used. However, a method of detecting sounds including 1/f fluctuations has not been established and clarified. Thus, a basic study of 1/f fluctuations was performed to select the sound to be used for the masker. Furthermore, brain waves of participants were measured in cases in which participants heard sounds including or not 1/f fluctuation. The results revealed that sounds including 1/f fluctuation of amplitude and frequency helped participants to relax.","PeriodicalId":50340,"journal":{"name":"International Journal of Applied Electromagnetics and Mechanics","volume":"46 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89164857","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In the electromagnetic detection in the ground-air frequency domain, the receving system converts the magnetic field signal into an electrical signal representing the magnetic field signal. In order to accurately obtain the relationship between the magnetic field signal and the electrical signal, it is necessary to avoid the influence of environment and other factors on the system accuracy through on-site calibration. This requires high calibration accuracy, simple operation, portable equipment and strong adaptability to the environment. However, the existing calibration methods put forward higher requirements for instruments and environment. For example, the calibration of uniform magnetic field generated by Helmholtz coil needs to shield external magnetic field interference. In this paper, an overall calibration method of measurement system based on magnetic source excitation is proposed to meet the requirements of electromagnetic field accurate measurement in ground-air frequency domain. Firstly, based on the electromagnetic measurement method in ground-air frequency domain, the overall calibration method and principle of the detection system are introduced. Then, based on the computable standard magnetic field generated by the magnetic source transmitting coil, determine the measured voltage obtained by the receiving system, get the calibration coefficient of the receiving system. At last,the source of standard uncertainty related to calibration is analyzed, and the uncertainty is evaluated. In addition, the method is verified by comparing the calibration results with those obtained by Braunbeck coil calibration.
{"title":"A calibration method of ground-air frequency domain electromagnetic receving system based on magnetic source excitation","authors":"","doi":"10.3233/jae-220197","DOIUrl":"https://doi.org/10.3233/jae-220197","url":null,"abstract":"In the electromagnetic detection in the ground-air frequency domain, the receving system converts the magnetic field signal into an electrical signal representing the magnetic field signal. In order to accurately obtain the relationship between the magnetic field signal and the electrical signal, it is necessary to avoid the influence of environment and other factors on the system accuracy through on-site calibration. This requires high calibration accuracy, simple operation, portable equipment and strong adaptability to the environment. However, the existing calibration methods put forward higher requirements for instruments and environment. For example, the calibration of uniform magnetic field generated by Helmholtz coil needs to shield external magnetic field interference. In this paper, an overall calibration method of measurement system based on magnetic source excitation is proposed to meet the requirements of electromagnetic field accurate measurement in ground-air frequency domain. Firstly, based on the electromagnetic measurement method in ground-air frequency domain, the overall calibration method and principle of the detection system are introduced. Then, based on the computable standard magnetic field generated by the magnetic source transmitting coil, determine the measured voltage obtained by the receiving system, get the calibration coefficient of the receiving system. At last,the source of standard uncertainty related to calibration is analyzed, and the uncertainty is evaluated. In addition, the method is verified by comparing the calibration results with those obtained by Braunbeck coil calibration.","PeriodicalId":50340,"journal":{"name":"International Journal of Applied Electromagnetics and Mechanics","volume":"28 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78853692","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Lei Zhao, Chengcheng Liu, Youhua H. Wang, Yiming Yang
Due to the effect of higher harmonics on magnetic properties under actual complex operating conditions, the accurate calculation of core losses of soft magnetic composites (SMC) is complicated. First, this paper improves the existing SMC model by introducing a correction factor to correct the hysteresis loss coefficient so that the model can consider the local variation characteristics of the magnetic density waveform and then calculate the core loss under different harmonic excitation. Then, the influence of skin effect and inhomogeneous flux density within the ring sample model is analyzed. Finally, to validate the improved model, it is compared with other models in the reference based on experimental measurements, respectively. The results show that the core loss calculated by the improved model is closer to the experimental results under different harmonic excitations. In addition, the applicability of the improved SMC model under triangular and square wave excitations is also verified by the derivation of the equations.
{"title":"Core loss analysis of soft magnetic composite under non-sinusoidal excitation based on finite element models","authors":"Lei Zhao, Chengcheng Liu, Youhua H. Wang, Yiming Yang","doi":"10.3233/jae-220280","DOIUrl":"https://doi.org/10.3233/jae-220280","url":null,"abstract":"Due to the effect of higher harmonics on magnetic properties under actual complex operating conditions, the accurate calculation of core losses of soft magnetic composites (SMC) is complicated. First, this paper improves the existing SMC model by introducing a correction factor to correct the hysteresis loss coefficient so that the model can consider the local variation characteristics of the magnetic density waveform and then calculate the core loss under different harmonic excitation. Then, the influence of skin effect and inhomogeneous flux density within the ring sample model is analyzed. Finally, to validate the improved model, it is compared with other models in the reference based on experimental measurements, respectively. The results show that the core loss calculated by the improved model is closer to the experimental results under different harmonic excitations. In addition, the applicability of the improved SMC model under triangular and square wave excitations is also verified by the derivation of the equations.","PeriodicalId":50340,"journal":{"name":"International Journal of Applied Electromagnetics and Mechanics","volume":"167 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83889015","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In the service of antenna arrays, especially for the large-scale antenna arrays, the deformation of the antenna structure is inevitable due to the influence of many structural factors. Therefore, effective compensation for the electrical performance of the antenna is one of the important means to ensure its normal and stable operation. An electrical compensation method based on the genetic algorithm to change the phase of the radiating element is proposed, which also considers the quantization error of the phase shifter. Under the 0.46𝜆 deformation condition, the left side lobe level of the horizontal radiometer with the worst performance deterioration is compensated by 2.15 dB, reaching the ideal state before deformation. The objectives and constraints in the optimization model can be adjusted according to the actual work requirements. The correctness and feasibility of proposed method are verified by an antenna array with 8 × 32 radiating elements.
{"title":"Electrical compensation for deformed antenna arrays and its experimental verification","authors":"","doi":"10.3233/jae-220122","DOIUrl":"https://doi.org/10.3233/jae-220122","url":null,"abstract":"In the service of antenna arrays, especially for the large-scale antenna arrays, the deformation of the antenna structure is inevitable due to the influence of many structural factors. Therefore, effective compensation for the electrical performance of the antenna is one of the important means to ensure its normal and stable operation. An electrical compensation method based on the genetic algorithm to change the phase of the radiating element is proposed, which also considers the quantization error of the phase shifter. Under the 0.46𝜆 deformation condition, the left side lobe level of the horizontal radiometer with the worst performance deterioration is compensated by 2.15 dB, reaching the ideal state before deformation. The objectives and constraints in the optimization model can be adjusted according to the actual work requirements. The correctness and feasibility of proposed method are verified by an antenna array with 8 × 32 radiating elements.","PeriodicalId":50340,"journal":{"name":"International Journal of Applied Electromagnetics and Mechanics","volume":"20 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88633852","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yujian Tong, Chong Li, Jiwen Fang, J. Xing, Xiaorui Fu
To increase the output displacement of the linear piezoelectric actuator, a linear piezoelectric actuator with large displacement and three operation modes is proposed. The operating principle of the piezoelectric actuator is presented. The magnification factor of the displacement amplification mechanism is deduced and verified by finite element analysis. To improve the output precision of the actuator, a feedforward PID control model is established. Based on the experimental test platform, the output characteristics of the piezoelectric actuator are tested. Results show the maximum output displacement of the piezoelectric actuator is 558.3 μm under a driving voltage of 150 V with two piezoelectric stacks. When the driving frequencies are less than 3 Hz, the control accuracy of feedforward PID is higher than that of PID, and the error between the measured displacement and the ideal value is less than 10% after applying the control to the piezoelectric actuator.
{"title":"Design and experiment of a large displacement linear piezoelectric actuator","authors":"Yujian Tong, Chong Li, Jiwen Fang, J. Xing, Xiaorui Fu","doi":"10.3233/jae-220232","DOIUrl":"https://doi.org/10.3233/jae-220232","url":null,"abstract":"To increase the output displacement of the linear piezoelectric actuator, a linear piezoelectric actuator with large displacement and three operation modes is proposed. The operating principle of the piezoelectric actuator is presented. The magnification factor of the displacement amplification mechanism is deduced and verified by finite element analysis. To improve the output precision of the actuator, a feedforward PID control model is established. Based on the experimental test platform, the output characteristics of the piezoelectric actuator are tested. Results show the maximum output displacement of the piezoelectric actuator is 558.3 μm under a driving voltage of 150 V with two piezoelectric stacks. When the driving frequencies are less than 3 Hz, the control accuracy of feedforward PID is higher than that of PID, and the error between the measured displacement and the ideal value is less than 10% after applying the control to the piezoelectric actuator.","PeriodicalId":50340,"journal":{"name":"International Journal of Applied Electromagnetics and Mechanics","volume":"53 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87236891","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Introduction to the ISEM 2022 special issue","authors":"C. Antonopoulos, T. Theodoulidis","doi":"10.3233/jae-239001","DOIUrl":"https://doi.org/10.3233/jae-239001","url":null,"abstract":"","PeriodicalId":50340,"journal":{"name":"International Journal of Applied Electromagnetics and Mechanics","volume":"46 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90765135","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
X. Gao, Hong-en Chen, Yong Li, Shuyun Li, Hui Chen, M. Wang, Sa Yang, Shuxia Tian, Zhen Chen
In this paper, inversion schemes for reconstruction of load and constraint of pipeline structure of a liquid rocket engine for global vibration evaluation of pipelines has been proposed and validated. The method involves modeling for forward simulation of random vibration and a multistep inversion scheme to reconstruct the unknown load and constraint parameters. In parallel, a piping structure vibration experimental system was also established to acquire the measured vibration signals for experimental validation of the numerical method. From both the numerical and experimental results, it was verified that a fine finite element model of a pipeline structure can be established based on the reconstructed load and constraint parameters which enables a global vibration evaluation of the pipeline structure based on limited vibration information.
{"title":"Reconstruction schemes of load and constraint for global vibration evaluation of pipeline structures","authors":"X. Gao, Hong-en Chen, Yong Li, Shuyun Li, Hui Chen, M. Wang, Sa Yang, Shuxia Tian, Zhen Chen","doi":"10.3233/jae-220223","DOIUrl":"https://doi.org/10.3233/jae-220223","url":null,"abstract":"In this paper, inversion schemes for reconstruction of load and constraint of pipeline structure of a liquid rocket engine for global vibration evaluation of pipelines has been proposed and validated. The method involves modeling for forward simulation of random vibration and a multistep inversion scheme to reconstruct the unknown load and constraint parameters. In parallel, a piping structure vibration experimental system was also established to acquire the measured vibration signals for experimental validation of the numerical method. From both the numerical and experimental results, it was verified that a fine finite element model of a pipeline structure can be established based on the reconstructed load and constraint parameters which enables a global vibration evaluation of the pipeline structure based on limited vibration information.","PeriodicalId":50340,"journal":{"name":"International Journal of Applied Electromagnetics and Mechanics","volume":"1 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79251595","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
As a new type of permanent magnet arrangement in the eddy current brake (ECB), the Halbach array is gradually gaining attention thanks to its excellent magnetic field utilization. However, the absence of an accurate theoretical model causes great distress in the design phase of the ECB. To tackle this, this article establishes a subdomain model that can intuitively observe the influence of structural and material parameters on the magnetic field and eddy current braking force. The accuracy of the analytical model is verified by the finite element method (FEM). The calculation results show that the eddy current braking force is the largest when the relative velocity of the primary and secondary reaches the critical velocity value. The recoil equation of motion is introduced to analyze the change law of the braking force under intensive impact load. A small prototype impact test platform was set up to analyze the change of braking characteristics of the ECB under the impact load. To reduce the weight of the ECB, the multi-objective optimization of the ECB parameters is carried out. The vital structural mass of the ECB is reduced by 19.44% while meeting the recoil requirements.
{"title":"Braking force characteristics and multi-objective optimization of eddy current brake under intensive impact load","authors":"Shimin Liang, Guolai Yang, A. Al-Zahrani, Lei Li","doi":"10.3233/jae-220138","DOIUrl":"https://doi.org/10.3233/jae-220138","url":null,"abstract":"As a new type of permanent magnet arrangement in the eddy current brake (ECB), the Halbach array is gradually gaining attention thanks to its excellent magnetic field utilization. However, the absence of an accurate theoretical model causes great distress in the design phase of the ECB. To tackle this, this article establishes a subdomain model that can intuitively observe the influence of structural and material parameters on the magnetic field and eddy current braking force. The accuracy of the analytical model is verified by the finite element method (FEM). The calculation results show that the eddy current braking force is the largest when the relative velocity of the primary and secondary reaches the critical velocity value. The recoil equation of motion is introduced to analyze the change law of the braking force under intensive impact load. A small prototype impact test platform was set up to analyze the change of braking characteristics of the ECB under the impact load. To reduce the weight of the ECB, the multi-objective optimization of the ECB parameters is carried out. The vital structural mass of the ECB is reduced by 19.44% while meeting the recoil requirements.","PeriodicalId":50340,"journal":{"name":"International Journal of Applied Electromagnetics and Mechanics","volume":"695 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83865045","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：