The increasing environmental awareness of the last decades has led to a huge tightening restrictions on vehicle pollutant and carbon dioxide emissions. Friction dissipation plays strategic role as its reduction necessarily leads decrease in CO2 Valve timing system is responsible for significant part overall friction losses provides relatively wide margin improvement. This regulates intake exhau...

The block medium is modeled by a discrete-periodic spatial lattice of masses connected elastic springs and viscous dampers. To describe the viscoelastic behavior interblock layers, rheological model internal friction with two Maxwell elements one Voigt element quality factor material as determining parameter proposed. Numerical experiments show that, within framework this interlayer model, it p...

The motion of an elastic body over a rough surface is simulated in one dimension using Newtonian dynamics. We drive the body by prescribing a constant velocity. We extract the friction force from the work done by the applied force in order to maintain the motion of the body. A positive amount of work is needed because energy is converted into the internal elastic degrees of freedom of the body....

organic manure plays an important role in the improvement of soil structure by decreasing bulk density and increasing porosity. however, the method of manure spreading influences its beneficial impact on soil structure. in this study, a novel helical manure distributor machine capable of spreading manure with different moisture contents at maximum distribution width was developed and the machin...

Joint friction is a major problem in accurate robot position control, particularly during low-speed, small-amplitude tasks. This paper proposes a simple, practical, and e!ective method to compensate for joint friction, using a six-axis force/torque sensor mounted under the manipulator. From these measurements, joint torques are estimated and used in a torque controller, which virtually eliminat...