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and mechanical properties of 42.6Bi-17.0Sn-40.4In alloy are comparable to those of 50.0Bi-25.0Pb-12.5Sn-12.5Cd Wood alloy, and can be used as the material for 72℃ thermal actuator in automatic sprinkler instead of Wood alloy. Key words: lead-free solder; fusible alloy; melting temperature; mechanical property; thermal actuator 控温易熔合金是指熔点低于232℃(Sn的熔点), 熔化范围窄且具有钎焊能力的合金, 广泛用于制作电器, 消防, 火灾报警装......
Secondary recrystallization of Goss texture in magnetostrictive Fe–Ga-based sheetsChao Yuan,Xue-Xu Gao,Ji-Heng Li,Xiao-Qian BaoState Key Laboratory of Advanced Metals and Materials,University of Science and Technology Beijing摘 要:To avoid the unfavorable effect of precipitates on magnetic properties,low addition of 0.16 wt% NbC was employed......
130012, China) Abstract: To solve the trajectory tracking problem of reconfigurable manipulator with sensor faults and actuator faults,a decentralized active fault-tolerant control method based on sliding mode observer was investigated.The sensor faults were equated to the actuator faults by introducing a new state.Based on these works, a sliding mode observer aiming at the new system which nonlinear......
) Abstract: The analysis and design problem of constrained RMPC fault-tolerant controller for a class of uncertain delayed systems with input and output constraints and actuator faults is studied. Based on RMPC algorithm, considering an actuator fault model with gain, using a linear matrix inequality method, sufficient conditions for the existence of constrained RMPC fault-tolerant controller......
; 文章编号:1672-7207(2011)S1-0579-05 Trajectory tracking and stabilization unified control for nonholonomic WMRs considering actuator dynamics HAN Guang-xin (College of Information... and stabilization unified control problem for a nonholonomic wheeled mobile robot considering actuator dynamics were studied. On the basis of Lyapunov method and backstepping technique, tracking control......
Mechanical and magnetostrictive properties of Tb0.36Dy0.64(Fe1-xMnx)1.9 alloys MA Tian-yu(马天宇), JIANG Cheng-bao(蒋成保) School of Materials Science and Engineering, Beijing University of Aeronautics... magnetization direction lies along <111>[8]. In the present work, the effects of Mn substitution for Fe on magnetostrictive and mechanical properties in Tb0.36Dy0.64(Fe1-xMnx)1.9 alloys were......
; 文献标志码:A 文章编号:1672-7207(2011)S1-0233-07 Adaptive sliding mode attitude tracking control for spacecraft under actuator... and the effectiveness of the control law derived here but also illustrate its great capability to handle reaction wheels misalignment. Key words: spacecraft; actuator misalignment; attitude tracking; sliding......
Inhibition force of precipitates for promoting abnormal grain growth in magnetostrictive Fe83Ga17-(B,NbC) alloy sheetsJi-Heng Li,Wen-Lan Zhang,Chao Yuan,Xiao-Qian Bao,Xue-Xu GaoState Key Laboratory... growth in magnetostrictive Fe83Ga17-(B,NbC) alloy sheets was investigated in this study. After a continuous heating and a high-temperature annealing, the Fe83Ga17 + 0.5 at% B alloy sheets do not occur......
angles and the given desired yaw angle. Considering actuator faults, adaptive method was used to estimate faults of the inner and outer loops to realize the fault tolerant control for quadrotor. Compared with the direct design, the structure of under-actuated control law was simple and could achieve actuator fault tolerance. The results show that the quadrotor can still realize the steady......
