This article shows that time derivatives of twists and wrenches are indeed screws, in contrast to many classical kinematicians’ believe. Furthermore, it is proven that the “centripetal screw,” as well as the momentum of a rigid body together with all its derivatives, are also screws, and that a rigid body’s dynamics can be geometrically expressed as a screw equation. The paper relies on a somew...

this paper presents the kinematic analysis and the development of a 4-degree-of-freedom serial-parallel mechanism for large commercial vehicle driving simulators. the degrees of freedom are selected according to the target maneuvers and the structure of human motion perception organs. several kinematic properties of parallel part of the mechanism under study are investigated, including the inve...

Cam-modulated linkages that can achieve superior kinematic performance as compared with pure linkages have been widely applied in a variety of automation machinery. The tolerance analysis and synthesis are thus quite essential in the design and manufacture of precision cam-modulated linkages. This paper presents comprehensive and systematic mathematical tools for dealingwith the tolerance analy...

conclusions zebris movement analysis system is a highly reliable instrument for the measurement of gait parameters at different speeds in healthy athletes and those after acl reconstruction surgery. this implies its use in the assessment and treatment process of gait deficits in such a clinically important population. background reconstruction surgery is one of the treatment methods after an an...

time–area method is one of the most widely applied techniques of watershed routing, and can be potentially used as a distributed model. in this paper, a fundamental flaw in the arrangement of subareas in the original time-area histogram is identified for one-dimensional flow. this is conducted on the basis of comparing time-area hydrograph with that of the kinematic wave theorem. accordingly, a...

Abstract: In article is considered the problem development mathematical model of the mechanism of parallel structure type of hexapod. The received model describes kinematic and dynamic properties of object. At the kinematic analysis are formed the matrix of transformation which depends from linear and rotational moving of platform. As a result of transformations we receive expressions establish...

In virtual human (VH) applications, and in particular, games, motions with different functions are to be synthesized, such as communicative and manipulative hand gestures, locomotion, expression of emotions or identity of the character. In the bodily behavior, the primary motions define the function, while the more subtle secondary motions contribute to the realism and variability. From a techn...

A popular saying claims that "innovation is 1% inspiration and 99% perspiration." In this paper, we present a method for automating most of the perspiration involved in innovative design. We restrict our attention to innovative design processes which can be structured into three steps: discovery of a new technique, understanding it, and generalizing it to t the problem at hand. The method we de...

This paper presents the kinematic analysis and the development of a 4-degree-of-freedom serial-parallel mechanism for large commercial vehicle driving simulators. The degrees of freedom are selected according to the target maneuvers and the structure of human motion perception organs. Several kinematic properties of parallel part of the mechanism under study are investigated, including the inve...

In this research, the structural synthesis of lower-class robot manipulators with general constraint one is investigated. The number constraints d = 1 and mobility λ 5 for sphere–sphere sphere–plane combinations higher kinematic pairs are investigated by using analytical approach. Structural new first- second-class transformations to lower pairs. Therefore, approach, we obtain groups one. Furth...