... performances. Therefore, this paper presents an optimization approach to synthesize and improve the dynamical performance of a reactionless three-degree-of-freedom planar mechanism. The three legs of this original mechanism are composed of reactionless four-bar mechanisms dynamically balanced with only one...

... dyads in two case studies. 04 01 2011 11 07 2011 04 10 2011 04 10 2011 bars propellers orientation order analysis spherical rigid-body guidance and spherical mechanism analysis The objective of this effort is to devise a methodology to determine whether...

... of either the curve or the surface under study. The paper closes with a complexity analysis of all six lower kinematic pairs, as a means to guide the mechanical designer into the conceptual stage of the design process. The paradigm is illustrated with the computation of the complexity of the four-bar...

... of planar four-bar linkages for the generation of open curves. Instead of using Fourier transform that requires a function to be defined over the entire period, we combine finite Fourier series in a curve fitting scheme for the approximation of periodic as well as nonperiodic paths. This yields a general...

...Changyu Xue; Kwun-Lon Ting; Jun Wang This paper presents the extension of the N-bar rotatability laws to N-bar chains containing prismatic joints. The extension is based on the principle that a prismatic joint may be regarded as a revolute joint located at infinity in the direction normal...

... Four-Bar Circle-Tracing Mechanisms: Classical and New Synthesis ,” Mech. Mach. Theory 0094-114X , 35 ( 11 ), pp. 1579 – 1599 . 10.1016/S0094-114X(00)00013-6 Kane , T. R. , 1973 , “ Solution of Kinematical Differential Equations for a Rigid Body ,” ASME Trans. J. Appl. Mech. 0021...

... are derived by eliminating and transforming angular variables on two five-bar loops and by using the specified values of input and output variables. Then, the deviation between the generated and required angular positions of the output link of the synthesized mechanism is obtained for the objective function...

... (five-bar mechanism). A simple and effective adaptive balancing method is presented that allows the mechanism to maintain the reactionless condition for a range of payloads. Important proofs concerning the balancing of five-bar mechanisms are also presented. The design of a real mechanism where...

...Bryan J. Bergelin; Javier O. Mattos; Joseph G. Wells, Jr.; Philip A. Voglewede This paper outlines the design and testing of a powered ankle prosthesis, which utilizes a four-bar mechanism in conjunction with a spring and motor that mimics nonamputee (normal) ankle moments. This approach would...

... of the point P on the connecting rod 12 07 2009 14 12 2009 31 08 2010 31 08 2010 bars couplings fuzzy set theory harmonic analysis harmonics numerical analysis spatial four-bar linkage dimensional synthesis harmonic component Fourier series The task...

...Ketao Zhang; Yuefa Fang; Hairong Fang; Jian S. Dai This paper presents a three-spherical kinematic chain based parallel mechanism that evolved from an origami fold. The new parallel mechanism with symmetrical structure consists of a base, a platform, and three-spherical six-bar chains as chain-legs...

... and dimensionality. Several case studies are presented, which demonstrate the approach’s effectiveness over earlier solution strategies. In these studies, six different planar single-degree-of-freedom mechanism types are considered: a four-bar mechanism, Stephenson’s six-bar-mechanisms (types I, II, and III...

... of encountering a dead center position. In a complex linkage, the input rotatability of each branch may be different. This paper presents a unified and comprehensive treatment for the full rotatability identification of six-bar and geared five-bar linkages, regardless of the choice of input joints or reference...

... and meaningful formulation of the model of the mechanism. Finally, a simple application to a planar four-bar mechanism is presented to illustrate the use of this model and the new possibilities that it opens, notably the study of the kinematics for any range of applied load. A nomenclature of the notation...

...Gim Song Soh; J. Michael McCarthy This paper presents a procedure that determines the dimensions of two constraining links to be added to a three degree-of-freedom spherical parallel manipulator so that it becomes a one degree-of-freedom spherical (8, 10) eight-bar linkage that guides its end...