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Distribution Method of Automotive Torque for Hub Motor Considering Energy Consumption Optimization
Wu Shi,Li Yipeng,Guan Yibo,Liu Taorui,Che CuiRu 한국자동차공학회 2023 International journal of automotive technology Vol.24 No.3
To optimize the torque distribution of each drive wheel of a distributed In-wheel motor car, this paper proposes an in-wheel motor torque distribution method to consider the energy consumption and slip loss of the motor. First, a torque distribution model is established based on the improved quantum genetic algorithm of the disaster operation. Under NEDC operating conditions, the energy consumption of the in-wheel motor based on the torque distribution method of the improved quantum genetic algorithm is reduced by 11.62 % compared with that of the torque equivalent distribution method and 3.94 % compared with that optimized by the genetic algorithm. Finally, based on the in-wheel motor test bench, the motor torque and the battery SOC curve of the wheel motor under the NEDC condition and UDDS operating conditions are obtained. Experimental results show that the torque distribution method based on the improved quantum genetic algorithm can effectively reduce energy consumption, and it performs better than the ordinary genetic algorithm. Also, the energy consumption optimization effect is the most significant under NEDC conditions, with an energy consumption 11.4 % lower than that of the torque equivalent distribution method and 3.8 % lower than that of the genetic algorithm optimization distribution method.
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Hongsheng Liang,Xiangtong Zhang,Yibo Yin,Tie Lin,Dong Guan,Bowen Ma,Changyu Li,Yuehua Wang 한국분자세포생물학회 2013 Molecules and cells Vol.36 No.1
The reorganization of brain structures after intracerebral hemorrhage (ICH) insult is crucial to functional outcome. Although the pattern of neuronal rewiring is well-docu-mented after ischemic stroke, the study of brain plasticity after ICH has been focusing on the enhancement of dendritic complexity. Here we hypothesized that functional restoration after ICH involves brain reorganization which may be favorably modulated by stem cell transplantation. In this study, bone marrow stromal cells (BMSCs) were transplanted into the perilesional sites of collagenase-induced ICH in adult rats one day after ICH injury. Forelimb functional recovery was monitored with modified limb placing and vibrissae-elicited forelimb placement tests. Anterograde and retrograde tracing were used to assess the reorganization of bilateral forelimb areas of the sen-sorimotor cortex. We found that in rats transplanted with BMSCs after ICH injury, axonal sprouting occurred in the contralateral caudal forelimb area of the cortex, and was significantly higher than in ICH rat models that received only the vehicle (P < 0.01). The number of positive neurons in the ipsilateral rostral forelimb area of the cortex of the BMSC group was 1.5- to 4.5-fold greater than in the vehicle group (P < 0.05). No difference was found between the BMSC and vehicle groups in hemispheric atrophy or labeled neurons in the ipsilateral caudal forelimb area (P = 0.193). Scores for improved functional behavior in the BMSC group were in accord with the results from histology. Neuronal plasticity of the denervated corticospinal tract at bilateral forelimb areas of the cortex in the collagenase-induced ICH rat models was significantly enhanced by BMSC transplantation. BMSC transplantation may facilitate functional recovery after ICH injury.
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