Abstract This article presents data on the properties of sliding contacts during rotation axis a device for pre-sowing treatment crop seeds, considers issues automation intermittent power supply and measurement electrical conductivity temperature parameters seed material in process electrotechnology. At same time, contact resistance circuit, normalized moistening sowing depending type plants, w...

The present study proposes the further validation of a simple mathematical procedure recently proposed by authors to describe contact and wear evolution in line point contacts. assumed that maximum pressure could be determined using Hertz equations parabolic profile. half-width was obtained equilibrium equation Archard law. Several cases were selected from literature, reporting experimental dat...

In this paper, we extend the sliding mode idea to a class of unmatched uncertain variable structure systems. This method is achieved with introducing a new terminal sliding variable and the finite time stability of proposed method is proved using a new particular finite time condition in both reaching and sliding phases. In reaching phase new sliding mode controller is derived to guarantee the ...

Previous studies have often observed that moisture can promote the lubricity and wear resistance of carbon-metal contact pairs in purely mechanical conditions. However, damage to pantograph carbon strips was found be aggravated rainfall conditions, leading a much lower service life than anticipated. This suggests novel influence mechanism water on carbon-copper (C-Cu) contacts during current-ca...

In Japan, the refrigerant used in room air-conditioners has been changed from HCFC-22 (R-22) to R-410A, a blend of HFC-32 and HFC-125 (50/50 vt%), in order to protect the ozone layer. Generally, the miscibility between the refrigerant and refrigeration oil must be assured, because the oil needs to return to the compressor from the refrigeration cycle and lubricate the sliding parts. Alternative...

Abstract This paper is devoted to an analytical, numerical, and experimental analysis of adhesive contacts subjected tangential motion. In particular, it addresses the phenomenon instable, jerky movement boundary contact zone its dependence on surface roughness. We argue that “adhesion instabilities” with instable movements cause energy dissipation similarly elastic instabilities mechanism. lea...

In this paper, an optimal adaptive sliding mode controller is proposed for anti-synchronization of two identical hyperchaotic systems. We use hyperchaotic complex T-system for master and slave systems with unknown parameters in the slave system. To construct the optimal adaptive sliding mode controller, first a simple sliding surface is designed. Then, the optimal adaptive sliding mode controll...