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Review: Anabaptist Beginnings (1523-1533): A Source Book.^ William R. Estep^ Jr.
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중등학교 체육수업 운영실태와 문제점 및 미래의 과제
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Cosmetic Evaluation Methods Adapted to Asian Patients after Breast- Conserving Surgery and Examination of the Necessarily Elements for Cosmetic Evaluation
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GLONASS 측위를 위한 위성좌표 산출 정확도 향상 방안
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SEDRIS 기반의 대기/해양 합성 환경 생성 및 표현을 위한 UI 설계 및 구현
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- 저자 : Wei Hanbing (검색결과 2 건)
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ADAPTIVE AUTHORITY ALLOCATION OF HUMAN-AUTOMATION SHARED CONTROL FOR AUTONOMOUS VEHICLE
Wu Yanhong,Wei Hanbing,Chen Xing,Xu Jin,Rahul Sharma 한국자동차공학회 2020 International journal of automotive technology Vol.21 No.3
Great advances had been achieved in the discipline of environmental perception, motion planning and control strategy implementation, however, fully autonomous vehicle is still far from large-scale commercial application. The concept of “human-automation shared control” provides a promising solution to enhance autonomous driving safety, to which great research effort has been contributed in recent years. Nevertheless, more attention should be given to the following aspects. The present shared control strategy either only considers the discontinuous switching control between driver and ADS or investigates the simple effect of driver’s behavior in specific scenarios. The adaptive authority allocation between the driver’s active assistance and ADS hasn’t been investigated yet. In this paper, a shared control experiment with driver’s active assistance is conducted in scheduled traffic scenarios to observe the state of vehicle and arm’ EMG signal. After that, we construct a feature classification algorithm for shared control authority by clustering the experimental data. Then, a SCS with incremental PID controller and 2 DOF vehicle dynamic model is proposed. For validation of the SCS, the comparison of vehicle performance for different control authority illustrates that SCS can allocate appropriate control authority to improve the safety.
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Uniaxial mechanical properties and failure characteristics of fractured silty mudstone
Jie Liu,Hualin Zhang,Hanbing Bian,Wei Wen,Ling Zeng 대한토목학회 2024 KSCE Journal of Civil Engineering Vol.28 No.1
Cracking behaviour of silty mudstone with existing flaws can trigger slope instability. However, the mechanics of multi-fractured silty mudstone have not been adequately examined. To handle this issue, the study employs a comprehensive approach to investigate the mechanical characteristics and cracking mechanism of fractured silty mudstone combing uniaxial compression test conducted by similar material specimens, cracking strength model, macro damage model, and PFC2D. Similar material specimens containing prefabricated fractures are prepared using steel sheet insertion during curing. Results show that peak strength initially decreases and subsequently increases as the facture dip angle ( ) increases, minimizing at 45° under uniaxial compressive load. The more fracture there exists, the greater reduction in peak strength. The failure morphology of fractured silty mudstone can be categorized into tensile failure, shear failure, and tensile-shear combined failure. Theoretical models confirm that the crack strength depends on and fracture length (a), aligning with experimental results while crack strength exhibit inversely proportional to a. The simulation results are in good correlation with test results, verifying the reliability of the simulated approach combined with theoretical analysis. Overall, the novel contribution of this paper lies in the multilateral elucidation of the failure mechanism in silty mudstone containing multiple fractures.
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