{"title":"Design and Optimization of Human-Machine Interaction Wearable Device for Lower Limb Rehabilitation Exoskeleton","authors":"Yue Zhang, Jianhua Wang, Weihai Chen, Jianbin Zhang, Zuobing Chen","doi":"10.1109/ICIEA51954.2021.9516326","DOIUrl":"https://doi.org/10.1109/ICIEA51954.2021.9516326","url":null,"abstract":"In this article, we designed a wearable device for the lower limb rehabilitation exoskeleton robots. The device is mainly composed of three parts: a slide rail mechanism, a detecting human-machine interaction force structure and a binding part. By adding passive degree of freedom to automatically compensate for the joint axis deviation between the exoskeleton and the human body, thereby reducing the radial parasitic force on the human leg. In order to verify the effect of automatic compensation of passive degrees of freedom, we conduct statics modeling for human-robot interaction coupling. At the same time, we also designed a device for detecting interaction force, which can obtain human movement intentions in rehabilitation training, and provide a hardware foundation for the research of human-robot cooperative control of rehabilitation exoskeleton. The detection device has the advantages of low cost, compact structure, and good detection performance.","PeriodicalId":6809,"journal":{"name":"2021 IEEE 16th Conference on Industrial Electronics and Applications (ICIEA)","volume":"155 1","pages":"2101-2106"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79832942","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A Suppression Circuit for The Current Pulse During Digital Valve Drive","authors":"Yi Wang, Shuai Wu, Hongtao Jin, Zongxia Jiao","doi":"10.1109/ICIEA51954.2021.9516205","DOIUrl":"https://doi.org/10.1109/ICIEA51954.2021.9516205","url":null,"abstract":"As an important research direction of the hydraulic system, the digital hydraulic system has attracted wide attention. Digital valve is a typical component in digital hydraulic system. The digital valve is robust to oil contamination and has low price, and it has two states: on and off. On the one hand, in order to improve the response, the digital valve is supplied by high driving voltage to open. On the other hand, in order to reduce the current, the digital valve is powered by low driving voltage to keep open. However, the above dual voltage driving mode to improve response will lead to the current pulse, which will cause a shock to the power supply. Therefore, a current suppression circuit based on supercapacitor was proposed. A simulation model of suppression circuit was built by using MWorks simulation platform. And the circuit was verified based on the simulation model. A series of experiments were completed according to the simulation to select appropriate parameters. The results show that the suppression circuit reduce the power supply current effectively. The supply current is reduced by 71 percent at most.","PeriodicalId":6809,"journal":{"name":"2021 IEEE 16th Conference on Industrial Electronics and Applications (ICIEA)","volume":"7 1","pages":"956-960"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82530648","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A Hybrid Single-Phase to Three-Phase Power Supply System With Voltage Error Compensation Strategy","authors":"Xinyi Wang, Cheng Guo, Fulin Zhou, Jinfei Xiong","doi":"10.1109/ICIEA51954.2021.9516044","DOIUrl":"https://doi.org/10.1109/ICIEA51954.2021.9516044","url":null,"abstract":"For the lack of three-phase power supply in some rural and remote regions, this paper presents a hybrid single-phase to three-phase power supply system based on reverse YNd11 transformer and phase-shifting converter with an improved control strategy. Firstly, the converter shifts the phase of the single-phase AC voltage by 60 degrees to construct the balance transformation condition of the reverse YNd11 transformer, so that the secondary side of reverse YNd11 can output symmetrical three-phase voltage. Then, this paper introduces the error caused by the non-ideal part of the control loop of the phase-shifting converter actively and reconstructs the phase-shifting converter reference voltage signal, which can be compensated without quantitative control. The output error of the phase-shifting converter is compensated, and the imbalance degree of the output voltage of the system is significantly reduced. The simulation results of the presented system with the improved control method have demonstrated the correctness and effectiveness.","PeriodicalId":6809,"journal":{"name":"2021 IEEE 16th Conference on Industrial Electronics and Applications (ICIEA)","volume":"68 1","pages":"989-994"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78644895","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Zehua Wang, Dong Wang, Shuai Liu, Jie Lian, Wei Wang
{"title":"Two-time-scale Containment Control of Multi-agent Systems with State-dependent Switching Topology","authors":"Zehua Wang, Dong Wang, Shuai Liu, Jie Lian, Wei Wang","doi":"10.1109/ICIEA51954.2021.9516092","DOIUrl":"https://doi.org/10.1109/ICIEA51954.2021.9516092","url":null,"abstract":"This paper proposes an event-triggered mechanism to achieve containment control for multi-agent systems with state-dependent switching topology, meanwhile ensuring a fully Zeno-free triggering for each follower. First, based on the idea of “estimation before transmission”, an observer in the $epsilon$-time scale is designed to fast estimate the states of leaders. Second, since the communication topology is time-vary, a predefined containment control protocol is presented based on the distributed state observer, where the expected convex combination of multiple leaders is predefined by some given weights. Subsequently, the closed-loop system is transformed into a switched system and a switching approach is introduced to find a waiting time in the event-triggered mechanism. At last, we provide a practical simulation example to demonstrate the validity of the proposed mechanism.","PeriodicalId":6809,"journal":{"name":"2021 IEEE 16th Conference on Industrial Electronics and Applications (ICIEA)","volume":"104 1","pages":"1918-1923"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75971542","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Regrouping Optimization Method for Retired Batteries based on Particle Swarm Optimization Algorithm","authors":"Xiangdong Li, Xu Chen, Yi Wang, Xiaoxia Si","doi":"10.1109/ICIEA51954.2021.9516407","DOIUrl":"https://doi.org/10.1109/ICIEA51954.2021.9516407","url":null,"abstract":"A large number of lithium-ion batteries retired from electric vehicles (EVs) need to be treated because nearly 80% of the capacity remains. However, the retired batteries have inconsistencies in capacity, state of charge (SOC), and internal resistance. If batteries are regrouped directly, the power and energy performance will be restricted. In order to improve the energy performance of the second-use battery pack, this paper studies the regrouping method of retired batteries. A semi-empirical model of LiFePO4 battery is used, and then a capacity fading model for the second-use battery pack considering inconsistencies is established. The maximum available Ah-throughput of the pack after regrouping is set as the optimization goal, and the particle swarm optimization algorithm (PSO) is used to search the optimal regrouping method. Simulation is employed to verify the method and the results show that the value of the maximum available Ah-throughput is about 8.2% larger than that of the traditional method. The proposed method is of great significance for guiding effect on the regrouping of retired batteries.","PeriodicalId":6809,"journal":{"name":"2021 IEEE 16th Conference on Industrial Electronics and Applications (ICIEA)","volume":"7 1","pages":"1614-1618"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86901571","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A Hierarchic Control Strategy for Reliability Enhancement of PFCs in Co-phase TPSS","authors":"Meng Wang, Minwu Chen, Wenjie Lu, Zhechao Kou, Haochun Fu, Xin Gong","doi":"10.1109/ICIEA51954.2021.9516310","DOIUrl":"https://doi.org/10.1109/ICIEA51954.2021.9516310","url":null,"abstract":"As the core component of co-phase traction power supply system (TPSS), the reliability evaluation and reliability optimization of power flow controllers (PFCs) are crucial to its safe operation. In this paper, the failure rate calculation model is adopted to evaluate the reliability of the PFCs. To enhance the reliability of PFCs, a novel hierarchic control of PFCs under the third compensation strategy is proposed in this paper. In the high-load area, all of the PFCs are operated simultaneously by the average-current sharing control while in the light-load area part of the PFCs unit is operated by turns to decrease the total power loss of converters. Taking the co-phase PFCs of the Shayu traction substation as an example, the effectiveness of proposed strategy is demonstrated. Results are shown that the failure rate of IGBT modules is reduced by 42.16% and the power loss is decreased by 11.75%.","PeriodicalId":6809,"journal":{"name":"2021 IEEE 16th Conference on Industrial Electronics and Applications (ICIEA)","volume":"16 1","pages":"1536-1540"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87164266","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yi Zhang, Ershen Wang, Jing Guo, Yao Wang, Cen Wu, M. Liu
{"title":"Analysis of Fault Detection Based on Least Squares Approach for BDS Integrity Monitoring","authors":"Yi Zhang, Ershen Wang, Jing Guo, Yao Wang, Cen Wu, M. Liu","doi":"10.1109/ICIEA51954.2021.9516106","DOIUrl":"https://doi.org/10.1109/ICIEA51954.2021.9516106","url":null,"abstract":"BDS receiver autonomous integrity monitoring plays an important role in avionic navigation system. In this paper, RAIM algorithm based on least squares approach is discussed. Least squares approach is used to detect and identify the fault satellite by the pseudo-range residual construction test statistics. The availability analysis of fault detection based on least squares approach of BDS single system is researched. The results show that the RAIM algorithm based on least squares approach can successfully detect and identify the fault satellite. After using the RAIM algorithm to eliminate fault satellite, it can be clearly seen that the positioning accuracy returns to a fault-free state. Moreover, the RAIM algorithm based on least squares is extremely important for the study of BDS satellite navigation and aviation user life safety.","PeriodicalId":6809,"journal":{"name":"2021 IEEE 16th Conference on Industrial Electronics and Applications (ICIEA)","volume":"30 1","pages":"827-832"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86371579","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Prediction of Lower Limb Action Intention Based on Surface EMG Signal","authors":"Xingming Wu, Peng Wang, Jianhua Wang, Jianbin Zhang, Weihai Chen, Xuhua Wang","doi":"10.1109/ICIEA51954.2021.9516344","DOIUrl":"https://doi.org/10.1109/ICIEA51954.2021.9516344","url":null,"abstract":"Aiming at the problem of helping lower limb disabled people recover their ability, this paper classifies and recognizes four kinds of movements (sitting, thigh lifting, leg lifting and leg straightening) based on surface electromyography (sEMG). Firstly, the healthy subjects were trained by collecting the surface EMG signal data of multiple groups of lower limbs. The EMG sensors were placed in the rectus femoris, medial femoris, semitendinosus and gastrocnemius to collect data. The noise is filtered by Butterworth filter and EMD signal reconstruction method, and the pure signal is obtained. The EMG features of each channel data are extracted, and the normalized input vector is sent to the classifier. In this paper, traditional classifiers such as random forest, xgboost and linear discriminant analysis are used to classify lower limb movements. Then, the accuracy of various classifiers is compared. It is found that the recognition accuracy of machine learning is higher, and EMD signal reconstruction method is better than Butterworth filter in the pretreatment of EMG signals, LDA classification accuracy is the highest, which can reach 100%. At the same time, the prediction speed of machine learning is faster, which can reach 300ms.","PeriodicalId":6809,"journal":{"name":"2021 IEEE 16th Conference on Industrial Electronics and Applications (ICIEA)","volume":"122 1","pages":"1679-1684"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86445118","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
J. Bi, Shiyun Xu, Huadong Sun, Yiming Wang, B. Zhao, Qiang Guo, Jianfeng Yan, Jianbo Guo
{"title":"Supplementary Damping Controller Design of DFIG With Mode-based Damping Torque Analysis Method","authors":"J. Bi, Shiyun Xu, Huadong Sun, Yiming Wang, B. Zhao, Qiang Guo, Jianfeng Yan, Jianbo Guo","doi":"10.1109/ICIEA51954.2021.9516241","DOIUrl":"https://doi.org/10.1109/ICIEA51954.2021.9516241","url":null,"abstract":"This paper introduced the design method of supplementary damping controller of DFIG with the mode-based damping torque analysis method. Firstly, the principle of the mode-based damping torque analysis method is stated. Then, the comparison of the mode-based damping torque analysis method and two traditional controller design methods, that is, the classical damping torque analysis method and the residue method, are illustrated. Through theoretical derivation, it can be seen that different from the classical damping torque analysis method, the mode-based damping torque analysis method takes the oscillation mode of the power system as the main analysis object directly, which reduced the amount of calculation greatly. In addition, in the controller parameter adjustment in closed-loop system, the “dynamic” mode-based damping torque indicator is theoretically more accurate than the “static” residual indicator. Finally, the modified two-area four-machine power system is used to determine the installation location and parameters of the supplementary damping controller of DFIG with the model-based damping torque analysis method, which demonstrated the correctness of the method.","PeriodicalId":6809,"journal":{"name":"2021 IEEE 16th Conference on Industrial Electronics and Applications (ICIEA)","volume":"142 1","pages":"1541-1546"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88991078","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Sen Wang, Xicong Sun, Wei Feng, Xianchao Ma, Yongzhi Jing, Songqi Li
{"title":"Optimization of Magnetic Coupling Resonance Coils","authors":"Sen Wang, Xicong Sun, Wei Feng, Xianchao Ma, Yongzhi Jing, Songqi Li","doi":"10.1109/ICIEA51954.2021.9516049","DOIUrl":"https://doi.org/10.1109/ICIEA51954.2021.9516049","url":null,"abstract":"In some practical applications of low-power coupled resonant wireless power transmission, besides the transmission efficiency, the anti-radial offset ability of the transceiver coils is also an important parameter to measure system performance. Consider that the positive correlation between the transmission efficiency and coupling coefficient of the coils, the symmetrical double-layer circular coils structure is proposed under the condition of maximizing the coupling coefficient in this paper. Based on the finite element method, the Maxwell simulation software is used to analyze different models. Simulation shows that the double-layer structure which reduces the number of outer layer turns can improve the coupling coefficient and the ability to resist radial offset both. It provides an idea for improving the system transmission efficiency and anti-radial offset ability both.","PeriodicalId":6809,"journal":{"name":"2021 IEEE 16th Conference on Industrial Electronics and Applications (ICIEA)","volume":"86 1","pages":"793-796"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83706413","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}