Designing an m-bar linkage with a maximal number of assembly modes is important in robot kinematics, and has further applications in structural biology and computational geometry. A related question concerns the number of assembly modes of rigid mechanisms as a function of their nodes n, which is uniquely defined given m. Rigid 11-bar linkages, where n = 7, are the simplest planar linkages for ...

In this paper we develop a complete classification scheme for planar, spherical and spatial four-bar linkages. The goal of this classification is to note all of the subtleties of motion that an arbitrary set of four link lengths can define. A classification should exist only between the mechanisms that exhibit similar ranges of motion at both the input and output. In the planar case, three para...

Repeated and intensive gait training can improve muscle strength movement coordination of patients with neurological or orthopedic impairments. However, conventional physical therapy by a physiotherapist is laborious expensive. Therefore, this not accessible for the majority patients. This paper presents six-bar linkage mechanism human rehabilitation natural ankle trajectory. Firstly, selected ...

In this paper, a four-bar mechanism with two flexible links is proposed to be used in a micromechanical flying insect robot wing thorax design for stroke amplification. PZT5H and PZN-PT based unimorph actuators are utilized at the input link of the four-bar. The kinematics and dynamics of the proposed wing strcuture with two parallel four-bar mechanisms are analyzed, and DC forces generated at ...

The work presents the analysis and synthesis of an eight-link mechanism for industrial seat suspension, followed by a numerical optimization design under specific technical requirements. Even though eight-bar linkage is well-known architecture, it has few applications in suspensions, shows interesting features compared with more traditional scissor systems. It possible to exploit this mechanism...

SYNOPSIS. The evolution of feeding mechanisms in the ray-finned fishes (Actinopterygii) is a compelling example of transformation in a musculoskeletal complex involving multiple skeletal elements and numerous muscles that power skull motion. Biomechanical models of jaw force and skull kinetics aid our understanding of these complex systems and enable broad comparison of feeding mechanics across...