**#****3(48), 2012**

**SUMMARIES**

kinematics of seven-bar Automatic manipulator. **N. Davitashvili. “**Problems
of Mechanics”. Tbilisi, 2012, ¹ 3(48), pp. 5-12, (Engl.).

In stated the
description, principle of operation and kinematical analysis of newly invented
seven-bar spherical automatic manipulator that is created on the basis of
spherical four-bar crank-and-rocker mechanism. Are defined kinematical
parameters of automatic manipulator, results of that age stated for its
dynamical analysis. 3 ill. Bibl. 11. Engl.; sum. in Russian.

KINEMATIC SYNTHESIS OF THE MOTION GENERATION OF LINKAGES. **Mehmet İsmet Can
Dede, Duygu Çömen, Gökhan Berker, İlkay
Erkılınçoğlu. “**Problems
of Mechanics”. Tbilisi, 2012, ¹ 3(48), pp. 13-20, (Engl.).

The kinematic synthesis of two degree-of-freedom (DoF) manipulators is
studied. Firstly, the motion generation requirements of manipulators are
established according to the problem statement. Mathematical models for three
and four poses of the gripper are determined. The motion generation synthesis
of planar manipulators as a systematic methodology is presented. Dimensions of
two-DoF manipulator are determined by interpolation approximation method. Finally
combining the two real synthesis solutions of two-DoF manipulator kinematic
synthesis for motion generation of four-bar linkage is accomplished. 3 ill.
Bibl. 15. Engl.; sum. in Russian

general task of dynamics of slider-piston mechanism
with clearances in kinematical pairs. **N. Davitashvili, V. Bakhshaliev. “**Problems
of Mechanics”. Tbilisi, 2012, ¹ 3 (48), pp. 21-31, (Engl.).

Is stated the general
analysis of crank-piston mechanism with clearances in kinematic pairs. Is
revealed that at existence of three clearances in kinematic pairs the solution
dynamics task with taking into account the basic and additional motions of
mechanism is significantly complicated. Is recommended to carry out the
solution of dynamics task at existing of clearances in two kinematic pairs of
mechanism. 2
ill. Bibl. 25. Engl.; sum. in Russian.

PARAMETERS SYNTHESIS OF
THE HYDRAULIC POSITIONING SYSTEM WITH
THE CONSTANT FORCE LOAD. **G.V. Kreinin, S.Yu. Misyurin. “**Problems of Mechanics”, Tbilisi, 2012, ¹
3(48), pp. 32-37, (Engl.).

The synthesis of a fast-acting positioning system with a hydraulic drive
and a mechanism with constant transfer ratio that displaces mass and force load are considered. The procedure
is based on a dimensionless dynamic similarity criterion and the criterial
relationships that make it possible to find the nearly optimal values of all
the basic parameters of the actuating device, the mechanism, the distributing
device, and the digital control system. 4 ill. Bibl. 7.
Engl.; sum. in Russian.

KINEMATIC SYNTHESIS OF PATH GENERATION OF PLANAR MECHANISMS.** ****Mehmet İsmet Can
Dede, Duygu Çömen, İlkay Erkılınçoğlu,
Emre Uzunoğlu. “**Problems of Mechanics”,
Tbilisi, 2012, ¹ 3(48), pp. 38-42, (Engl.).

Kinematic synthesis of planar mechanisms is studied. Path generation
method is applied to generate planar four-bar mechanism. The task of synthesis
refers to a problem in which a coupler point is desired to generate a given
path. Nonlinear systems of equations with one constraint equations for each
independent loop are obtained. Generated square equations with respect to the
Lagrange coefficients are solved by using interpolation approximation method
and design parameters are obtained. Results are given in tables. 2 ill. Bibl.
6. Engl.; sum. in Russian.

passability
of tandem-wheeled self-propelled chassis. **R. Makharoblidze, I. Lagvilava, O. Asatiani, A.
Kobakhidze. “**Problems
of Mechanics”. Tbilisi, 2012, ¹ 3(48), pp. 43-47, (Engl.).

The passability of
tandem-wheeled
self-propelled chassis is evaluated by
such relative indicators
as passability on the wheels sinking into the ground, patency of
passability on bearing
capacity, passability on adhesion of wheels, passability on engine traction, a passage between space between
rows crops and tea plantations.
The passability indicators give
the possibility to take into account the soils rheological properties and the
parameters of adaptive tandem wheeled self-propelled chassis. Bibl. 5. Engl.; sum.
in Russian.

theory
of soil compaction by running bodies of adaptive tandem-wheeled self-propelled
chassis. **R.
Makharoblidze, I. Lagvilava, O. Asatiani, A. Kobakhidze. “**Problems
of Mechanics”. Tbilisi, 2012, ¹ 3(48), pp. 48-53, (Engl.).

The theory of soil
compaction by running bodies an adaptive tandem-wheeled self-propelled chassis
is developed. Proceeding from the soil rheological properties and parameters of
adaptive tandem-wheeled self-propelled chassis in the deformation distribution
zone is defined functional dependency between soil average density and running
parts of adaptive tandem-wheeled self-propelled chassis. Is developed the
technique of calculation of all physical values that are stipulated due
standard for assessment of running system’s parameters impact on ground. Due
these parameters is stated the comparison of experimental and serial
self-propelled chassis. 1 ill. Bibl. 6. Engl.; sum. in Russian.

DEFINITION
OF IMPACT INTERACTION PARAMETERS AT GRIP OF METAL BY MILL ROLLERS.** T. Natriashvili, S. Mebonia, M.
Mikautadze, D. Demetradze. “**Problems of Mechanics”. Tbilisi, 2012, ¹ 3(48),
pp. 54-59, (Engl.).

The** **method
of selection of the calculation scheme and the reological model of
impact process of rolling and
tube mills elements is given there. The
formulae for definition of the impact process main parameters are presented. 3 ill. Bibl.
8. Engl.; sum. in Russian.

research mode of deformation of thin depressed shells
with elliptical holes.**
I. Badzagua. “**Problems
of Mechanics”. Tbilisi, 2012, ¹ 3(48), pp. 60-64, (Engl.).

Is considered depressed shell with elliptical holes, which two
opposite sides are rigidly fixed, and other two opposite sides are simply
supported. Are considered two cases: the shell with small hole and shell with
large hole. For the calculation of shell with small hole is applied generalized
method and for shell with large hole is applied the method of contour points
discretization method.* *1 ill. Bibl. 4. Engl.; sum. in Russ.