Trajectory Planning Optimization of Two-degree-of-freedom Parallel Mechanism by Junwei Shen, Heng Cheng

“…Aiming at the vibration problem of traditional parallel manipulator trajectory planning， two-degree-of-freedom parallel mechanism is studied， and a trajectory planning method based on high-order differentiable compound polynomial is proposed. …”
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Design and Analysis of Three-Degree-of-Freedom High-stiffness Robot by Meijia Zhi, Xianmin Kang, Qibin Zhong, Hongzhi Yu, Yao Chen

Subjects: “…Faucet;Three-degree-of-freedom;High-stiffness…”
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A New Universal Formula of Degree of Freedom for Planar Mechanism by Han Qing, Li Tiancheng

“…Without taking into account of redundant constraints,common constraints and isolated degree of freedom（DOF）,the traditional DOF calculation formulas are inefficient in calculating the DOF of planar mechanism in certain complicated cases.In addition,recalculating is needed when the configuration of mechanisms is changed.To solve these problems,a novel universal formula of DOF for planar mechanisms is presented based on the effectiveness impact of the components on the relation of input and output motion of mechanism.The algebraic relationship between redundant constraints,common constraints,partial DOF and the DOF of mechanism is studied respectively.The valid components,valid loops and higher pairs are defined as formula variables.The new formula does not need to calculate compound hinges and lower pairs and overcomes the invalidity of traditional formulas,which can be used directly for all kinds of planar mechanisms.In addition,by defining valid loops of mechanisms,the new formula emphasizes the impact of components,the basic unit of mechanisms,on the DOF of mechanism,which can avoid recalculating when the configuration of mechanisms is slightly changed.Contrast examples are presented to show the simplicity and validity of the new formula,which can be applied to ad-hoc planar mechanisms that couldn’t be solved by traditional formulas.…”
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BASED ON AVERAGING METHOD ANALYSIS OF THE SINGLE DEGREE OF FREEDOM AMPLITUDE FREQUENCY by WANG ShuGuo, GUO LiFeng, LIAO PengTai, ZHANG YanBo

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Mode Analysis of Degree of Freedom of a New Bifurcation Parallel Mechanism by Song Wei, Xu Yong, Liu Yong, Lü Yeping, Liang Zheng

“…A new bifurcated single-loop closed-chain configuration URRC is proposed.This single-loop closed-chain has two degrees of freedom modes.A bifurcated parallel mechanism is obtained by combining series branch PRRP with bifurcated single-loop closed chain to form a hybrid branch chain and connecting the moving platform and fixed platform with three parallel branches.Through the combination of different modes of single-loop closed-chain，the parallel mechanisms of 3T3R，3T，2R1TⅠ，2R1TⅡ and 1R2T with five DOF modes are obtained.The correctness of the five DOF modes of the bifurcated parallel mechanism and the rationality of driving selection are proved by screw theory analysis.…”
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On the Balance Path of Navigation Freedom and Environmental Protection in Northwest Route of the Arctic by Yanan QU, Haiyi ZHAO

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Design of Chewing Robot with Less Degrees of Freedom based on Chewing Characteristic by Xuqi Wu-Fan, Qiang Xu, Sheng Liu, Mingming Gu

Subjects: “…Chewing robot;Low degree of freedom parallel mechanism;Kinematics analysis;Motion simulation…”
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VIBRATION RESPONSE ANALYSIS OF FIVE-DEGREE-FREEDOM VEHICLE WITH STOCHASTIC STRUCTURAL PARAMETERS by JIA AiQin, JIANG ZhiQiang, CHEN JianJun, WEN ZhenHua

Subjects: “…Five-degree-freedom vehicle system;Equivalent linearization method;Energy difference;Random parameter;Random response…”
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Periodic Motion and Its Stability of 3 Degree-of-freedom Gear Rotor System by Tian Yaping, Chu Yandong

“…The coexisting periodic trajectory and its stability of a single- stage gear rotor transmission system with 3 degree- of- freedom are studied by using the method of CPNF（ Continue- Poincare- Newton-Floquet）. …”
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METAMORPHIC DESIGN AND DEGREE OF FREEDOM ANALYSIS ABOUT PARALLEL MECHANISM FOR ANKLE REHABILITATION by CHEN GengBiao, YI KuanHan

Subjects: “…Metamorphic;Parallel mechanism;Degree of freedom;Screw theory…”
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Design and Research of an Eight-bar Back Lifting Mechanism with Single Degree of Freedom by Sun Xuebin, Yu Chengtao, Pan Ao, Gu Cheng, Huang Guangming

“…In order to improve the comfort and stability of the separable nursing bed-chair, a new type of eight-bar back lifting mechanism with single degree of freedom is designed. Firstly, combining with ergonomics and taking back slip and slip speed as parameters, it is verified that the back lifting motion of the combined lumbar-back backing plate is more comfortable than that of the traditional single-plate backing plate. …”
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DESIGN AND THE ANALYSIS OF SIX-DEGREE-OF-FREEDOM ADJUSTING MECHANISM WITH HIGH ACCURACY AND STIFFNESS by HE Lei, HAN HasiaoQier, HAN ChunYang, HE Shuai, CHEN LiHeng

“…A precision adjusting mechanism of six-degree-of-freedom（SDOF）based on Stewart structure with high accuracy and high stiffness is designed in this paper. …”
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Kinematics and Dynamics Analysis of a Two-degree-of-freedom Arm Rehabilitation Robot by Xin Meng, Tao Qin, Fuquan Tu

“…A two-degree-of-freedom arm rehabilitation robot with two-link series structure is designed for the requirements of upper limb rehabilitation training. …”
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EQUIVALENT CIRCUIT SIMULATION OF TWO-DEGREE OF FREEDOM VIBRO-IMPACT SYSTEM WITH GAP by LIU RuiJia, WANG Zheng, LUO Fan

“…Taking the two-degree of freedom vibro-impact system with gap as the research object, the mathematical model was established and the numerical simulation analysis was carried out in Matlab software. …”
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Exploration of high-altitude dynamic soaring based on six-degree-of-freedom model

“…The results show that the dynamics model based on the six-degree-of-freedom equation can more realistically reflect at high altitude; the application of dynamic soaring can effectively improve the range of the high-altitude UAV; the wind direction at high-altitude wind field has a significant effect on the dynamic soaring efficiency.…”
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Calculation and Analysis of Time Varying Mesh Stiffness of Gear with Considering Translational Freedom by Te Chen, Huaguo Chen, Jianmin Li, Hang Yu

Subjects: “…Translational freedom;Time varying mesh stiffness;Potential energy method;Ideal involute gear;Spur gear…”
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APPLICATION OF MULTI-DEGREE-OF-FREEDOM SYSTEM IN VIBRATION ISOLATION DESIGN OF OPTOELECTRONIC POD by WANG PengPeng, JIA HongGuang, XUE ZhiPeng, LI Ming, GUAN YongLiang

Subjects: “…Vibration isolation;Optical pod;Multi-degree-of-freedom system…”
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Establishment and Simulation of Twelve-Degree-of-Freedom Model for UAV Parachute Recovery System

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Error Analysis and Compensation of a Three-degree-of-freedom Cervical Traction Rehabilitation Mechanisms by Hong Li, Qingfeng Wang, Xinyu Wang, Weixiao Lu

“…Based on the mechanism of human cervical traction rehabilitation and the characteristics of the cervical spine area that is precise and easily damaged， a 2-UPR/RPS three-degree-of-freedom cervical traction rehabilitation mechanism is proposed； the error analysis and compensation of this mechanism are carried out to avoid secondary damage to the cervical spine. …”
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RESEARCH ON KINEMATIC CALIBRATION METHOD OF THREE DEGREE OF FREEDOM SERIES MANIPULATOR BASED ON BALLBAR by CHE YaXiao, YANG XinGang, GAO Feng, HUANG YuMei, HAN WenTao, GAO Heng

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