In this paper we present the synthesis of novel reactionless spatial three-degrees-of-freedom (3-DoF) and 6-DoF mechanisms without any separate counter-rotation, using four-bar linkages. Based on the conditions of dynamic balancing of a single planar four-bar linkage developed elsewhere, the spatial problem is shown to be equivalent to ensuring that the inertia tensor of reactionless four-bar l...

Analysis of the curvature properties of the link lengths of a four-bar mechanism via Mathematical Modeling Techniques using MATLAB Software. The proper identification of the lengths which has been taken analytically using Freudenstein’s equation, which is an experimental work as well as virtual visualization of the work & the model of a 4-bar linkage ,whose modeling has been done through MATLAB...

The suspension basically comprises of a linkage which is a 3D mechanism SRRS (Spherical, Revolute, Revolute, Spherical). On the basis of six included angles of this four bar chain, position of kingpin axis is determined. Once the position of kingpin axis is decided corresponding steering parameters can be determined. In such complex phenomenon involving non-linear kinematics where validation of...

Result obtained during ten years research work (1990-2000) on distribution of monogenean fauna Iranian fishes indicates that its composition of monogenean fauna of Iranian fishes depends on their habit and since Iran includes three different zoogeographical zones with highly endemic fish hosts, its monogenean parasites have specific composition. The Caspian fauna is characterized by relatively ...

Abstract Inspired by the jumping action of frogs, the mechanical structure of four-legs jumping robot is given particularly. This robot is used for the rough terrains or wetland environmental exploration. The four identical legs are mainly composed of a six-bar spring/linkage mechanism integrated with two springs. The D-H parameters, the forward kinematics equation and mechanics analysis on one...

Four-bar linkage mechanisms are of interest for many specialists in the academia and industry. However, it is one of the mechanisms that is highly nonlinear and exhibits complex behavior. Therefore, it is difficult to model and control their dynamic responses. In this paper, various control schemes are explored and tested on the four-bar mechanism to investigate the dynamical performance under ...