Andres Petritshenko

Tallinn University of Technology | TTU · Department of Mechanical and Industrial Engineering

The early design is an important but often underestimated design stage of a new product development process. Engineering decisions at different design stages affect the final product without any doubt. However, decisions made at an early design stage affect the result much more than later ones. The objective of the research is to provide comprehens...

The research presented in this paper is focusing on the wheel-terrain interaction of mobile robots. In particular four most common interaction cases are analysed and mathematical relationships in terms of forces are pointed out. The purpose of defining the wheel-terrain intaraction forces for different cases are to transfer them into the design lib...

In this paper, the kinematics and dynamics of the configurable wheel-leg is considered. The configurable wheel-leg has been invented by TUT researchers to increase the mobility of the wheeled vehicles, mostly unmanned ground vehicles, on different terrains and to overcome obstacles that are unobtainable to the conventional wheels e.g. climbing on s...

The purpose of this paper is to generalize the method of finite differences described in (Kollats, 1969). For obtaining of interpolation polynomials, the matrixes and method of uncertain coefficients are used. The essential simplification of the calculation formulae is received; in particular case they are the L. Kollats' formulas. The accuracy of...

The aim of this paper is to develop a simplified method for analysis of free vibration of floor system consisting of continuous steel plate and steel frame in plane to reinforce it. The study of such orthotropic system is of practical interest and aimed at small businesses, which are not able to obtain expensive programs for performing such calcula...

In this paper, the forced vibration of ladder frames under the action of repeated interrupted loading are studied. This problem has not been yet considered in sufficient detail and width in technical and scientific literature. Often vibration of ladder frames under the action of instant impulses or periodical harmonic force has been considered. To...