Based on the theoretical analysis and experimental study of pneumatic damping behaviour for the valves in the reciprocating compressor, this paper presents a simple mathematical model of pneumatic damping valves, in which the non-viscous damping force is introduced. The non-viscous damping coefficient is obtained by the experimental determination. The simulation results of this simple model for...

Stiffness degradation and damping represent some of the most well-known aspects of cyclic soil behavior. While standard equivalent linear approaches reproduce these features by (separately) prescribing stiffness reduction and damping curves, in this paper a multiaxial visco-elastic-plastic model is developed for the simultaneous simulation of both cyclic curves over a wide cyclic shear strain r...

This paper presents a novel approach for grasp optimization considering contact position and object information uncertainties. In practice, it is hard to grasp an object at the designated or planned contact positions, as errors in measurement, estimation, and control usually exist. Therefore, we first formulate the influences of contact uncertainties on joint torques, contact wrenches, and fric...

The article contains generalized systems of equations describing the vertical and longitudinal-angular vibrations main parts tractor with mathematical model hierarchical linear oscillation tractor, irregularities roads, taking into account rigidity damping. It includes systems: skeleton over propellers a on an uneven road; cab rear walking roads. Equation have also been compiled that describe o...

The asymptotic behavior of dissipative hyperbolic systems is very sensitive to the precise nature of the dissipation. Dry (Coulomb) friction is a limit case that has not been fully analyzed, for instance with respect to the asymptotic time behavior of solutions. Examples of such a problem are given by simple models of granular materials in containers. A numerical approach for generic problems o...