東北大学 · Engineering
Yujie Cui 교수의 연구실은 주로 마그네슘 기반 첨단 합금의 나노구조 제어 및 열간 압연·압출 가공 중 미세구조 변화를 중심으로 연구를 진행하고 있습니다. 특히 동결변형, 동적 재결정화, 타원형 변형 등에 의한 미세구조 형성 거동과 고체상에서의 비대칭 타원형-해리 행동(Twinning-Detwinning) 거동을 전자산란결정학(EBSD) 기법을 활용해 정량적으로 분석하고 있습니다. 이와 더불어 인간형 로봇의 운동학적 제어를 위한 기하학적 모델링 및 제어 방정식 수립도 함께 연구하고 있습니다.
표시된 성과는 수집된 데이터 기준으로 산출되며, 일부 차이가 있을 수 있습니다.
We utilized electron backscatter diffraction to investigate the microstructure evolutions of a newly developed magnesium-rare earth alloy (Mg–9.80Gd–3.78Y–1.12Sm–0.48Zr) during instantaneous hot indirect extrusion. An equiaxed fine-grained (average grain size of 3.4 ± 0.2 µm) microstructure with a weak texture was obtained. The grain refinement was mainly attributed to the discontinuous dynamic recrystallization (DDRX) and continuous DRX (CDRX) processes during the hot indirect extrusion process
Twinning-detwinning (TDT) behavior in a strongly basal-textured Mg-Li alloy during two-step compression (RD)-compression (ND) process was investigated using quasi-in-situ EBSD. TDT behavior and TDT variants selection were statistically discussed with the loading path for the first time. Non-Schmid twinning behavior was observed in the first step compression, owing to the local stress fluctuations by neighboring twins; in contrast, Schmid's law well predicted the detwinning variants selection. Th
Detailed analysis is given to kinematics of a humanoid robot manipulator. Forward and inverse kinematics of the robot manipulator is performed through Denevit and Hartenberg method. Geometry transformation and square transformation methods are put forward in order to separate joint variables from kinematic equations and kinematics equations are obtained, whereupon mathematic formulas are provided for humanoid robot manipulator control. Simulation results verify the effectiveness of kinematics eq
