mechanical weeding is one of the non-chemical methods to control weeds. in this paper a ‎new mechanism has been presented for mechanical cultivation. the machine works based on ‎the manual tools operation, which farmers still use in small scale for weeding and consists of a ‎number of four-bar linkage mechanisms. each mechanism consists of a blade which moves ‎forward (active course) and backwa...

In order to solve the limitation of cylindrical geared linkage in trajectory realization, this paper make the non-circular gear pair and double crank hinge five-bar as closed combination, and to probe the feasibility and method of designing non-circular gear based on the given position points in five-bar linkage trajectory region. The discrete rotation angle sequences of non-circular gear pair ...

This paper discusses a new methodology for the synthesis of planar four-bar linkages with rotary joints based on a desired coupler curve. This was performed by first deriving a closed-form expression relating the coupler points to the corresponding crank orientations, which in turn evaluated to zero when the desired point is reached exactly at the specified crank angle. The residual values of t...

A linkage-based chewing device is proposed to perform standardised chewing for use in food evaluation. The linkage for chewing is firstly specified in terms of the trajectory of the first molar and the chewing force, according to the in vivo measurements of the human chewing ranging from grinding (or lateral chewing) to crunching (or vertical chewing). A fourbar linkage is synthesized to achiev...

In this paper, we suggest a novel transmission for the DC motor-based flapping-wing micro aerial vehicles (FWMAVs). Most FWMAVs employ linkage structures, such as crank-rocker or crank-slider, which are designed to transmit motor’s rotating motion wing’s flapping motion. These transmitting linkages have shown successful performance; however, they entail possibility of mechanical wear originatin...

Legs are the most important elements for accomplishing human physical work including transportation or displacement. The article presents a mechanical reproduction of the human walking apparatus. Using design rules, a final mechanism configuration is achieved such that the crank is a binary link connected to a binary ground link. The resulting linkage is a single degree-of-freedom (DOF) eight-b...

Deepak Behera and Dr.J.Srinivas, Department of Mechanical Engineering, NIT-Rourkela 769 008 email: [email protected] Abstract: This paper presents the kinetostatic analysis and design of a two degree-offreedom five-bar underactuated compliant mechanism using a pseudo-rigid body modeling. Two of the joints in the linkage are flexible and actuation is provided to the crank. The slider connected ...

In this paper, the dynamic analysis of a translating five-bar linkage mechanism is presented. The model developed with applied force to crank arm resolved into two principal planes, that is, x- and y- directions resulting reaction forces moments at pin joints determined various acceleration 0, 10, 20, 30 40 m/s2 in direction as well opposite rotation. It was observed horizontal were decreasing ...

At present, the research objects of rigid-body guidance synthesis are mostly limited to pure linkages, and there is little on combined mechanisms gears or cams linkages. In order expand improve kinematic mapping theory, this paper proposes a method noncircular gear-five-bar mechanisms. A mechanism can be regarded as combination 2R (two revolute joints) open chain, 3R (three chain pair gears. Fi...

This paper describes a case-study which illustrates the capabilities of a commercially available software package called SyMech, which runs within Pro/ENGINEER. The software allows a designer to synthesize arbitrarily complex planar mechanisms by sequentially specifying one of three basic mechanism design functions: position, path, or angle. Because the software runs directly within Pro/ENGINEE...