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| 1 | An investigation on adaptively machining the leading and tailing edges of an SPF/DB titanium hollow blade using free-form deformation显示文摘Titanium hollow blades are characterized with lightweight and high structural strength,which are widely used in advanced aircraft engines nowadays.Superplastic forming/diffusion bonding(SPF/DB) combined with numerical control(NC) milling is a major solution for manufacturing titanium hollow blades.Due to the shape deviation caused by multiple heat and pressure cycles in the SPF/DB process, it is hard to manufacture the leading and tailing edges by the milling process.This paper presents a new adaptive machining approach using free-form deformation to solve this problem.The actual SPF/DB shape of a hollow blade was firstly inspected by an on-machine measurement method.The measured point data were matched to the nominal SPF/DB shape with an improved ICP algorithm afterwards, by which the point-pairs between the measurement points and their corresponding points on the nominal SPF/DB shape were established, and the maximum modification amount of the final nominal shape was constrained.Based on the displacements between the point-pairs, an accurate FFD volume was iteratively calculated.By embedding the final nominal shape in the deformation space, a new final shape of the hollow blade was built.Finally, a series of measurement and machining tests was performed, the results of which validated the feasibility of the proposed adaptive machining approach. | Zhengcai ZHAO Jiuhua XU Yucan FU Zhiqiang LI | 2018 | Chinese Journal of Aeronautics2018，31，1： | 5 |
| 2 | Vision-based Stabilization of Nonholonomic Mobile Robots by Integrating Sliding-mode Control and Adaptive Approach显示文摘Vision-based pose stabilization of nonholonomic mobile robots has received extensive attention.At present,most of the solutions of the problem do not take the robot dynamics into account in the controller design,so that these controllers are difficult to realize satisfactory control in practical application.Besides,many of the approaches suffer from the initial speed and torque jump which are not practical in the real world.Considering the kinematics and dynamics,a two-stage visual controller for solving the stabilization problem of a mobile robot is presented,applying the integration of adaptive control,sliding-mode control,and neural dynamics.In the first stage,an adaptive kinematic stabilization controller utilized to generate the command of velocity is developed based on Lyapunov theory.In the second stage,adopting the sliding-mode control approach,a dynamic controller with a variable speed function used to reduce the chattering is designed,which is utilized to generate the command of torque to make the actual velocity of the mobile robot asymptotically reach the desired velocity.Furthermore,to handle the speed and torque jump problems,the neural dynamics model is integrated into the above mentioned controllers.The stability of the proposed control system is analyzed by using Lyapunov theory.Finally,the simulation of the control law is implemented in perturbed case,and the results show that the control scheme can solve the stabilization problem effectively.The proposed control law can solve the speed and torque jump problems,overcome external disturbances,and provide a new solution for the vision-based stabilization of the mobile robot. | CAO Zhengcai YIN Longjie FU Yili | 2013 | Chinese Journal of Mechanical Engineering2013，26，1： | 4 |
| 3 | Synthesis of 3,5-Dichloro-4-(1,1,2,2-tetrafluoroethoxy)phenyl Containing 1,2,3-Thiadiazole Derivatives via Ugi Reaction and Their Biological Activities显示文摘包含 4-methyl-1,2,3-thiadiazole 衍生物的一系列新奇 3,5-dichloro-4-(1,1,2,2-tetrafluoroethoxy ) 苯基经由 Ugi 反应被设计并且综合。他们的结构被红外, 1H NMR, 13C NMR 和高分辨率的集体光谱学证实。初步的生物鉴定结果显示一些标题混合物在 50 g/mL 举办了好杀真菌剂活动;大多数混合物在 500 g/mL 和 100 g/mL 对烟草马赛克病毒介绍了直接抑制活动,好 inactivation 和药品活动的某个度;一些混合物对 Plutella xylostella L 显示出好 larvicidal 活动。在对在 2 g/mL 的一种蚊虫 pipiens pallens 的 200 g/mL 和优秀 larvicidal 活动。 | Wang Shouxin Wang Huan Fan Zhijin Fu Yifeng Mi Na Zhang Jufang Zhang Zhengcai Belskaya Nataliya P. Bakulev Vasiliy A. | 2011 | Chinese Journal of Chemistry2011，29，2： | 4 |
| 4 | Visual Servo Stabilization of Nonholonomic Mobile Robot Based on Epipolar Geometry and 1D Trifocal Tensor显示文摘 | CAO Zhengcai YIN Longjie FU Yili ZHANG Jie | 2013 | Chinese Journal of Electronics2013，22，4： | 2 |
| 5 | An improved TS algorithm for loss-minimum reconfiguration in large-scale distribution systems显示文摘 | ZHANG Dong FU Zhengcai ZHANG Liuchun | 2007 | Electric Power Systems Research2007，77，56： | 1 |
| 6 | An improved TS algorithm for loss-minimum reconfiguration in large-scale distribution systems显示文摘 | Zhang Dong Fu Zhengcai Zhang Liuchun | 2007 | Electric Power Systems Research2007，77，： | 1 |
| 7 | An improved TS algorithm for loss minimum reconfiguration in large scale distribution systems 显示文摘 | ZHANG Dong FU Zhengcai ZHANG Liuchun | 2007 | Electric Power Systems Research2007，77，56： | 1 |
| 8 | An improved TS algorithm for loss-minimum reconfiguration in large-scale distribution systems显示文摘 | ZHANG Dong FU Zhengcai ZHANG Liuchun | 2007 | Electric Power Systems Research2007，77，2： | 1 |
| 9 | An improved TS algorithm for loss-minimum reconfiguration in large-scale distribution systems显示文摘 | ZHANG Dong FU Zhengcai ZHANG Liuchun | 2007 | Electric Power Systems Research2007，77，： | 1 |
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