Driving wheel operation is characterized by force interactions with the ground, manifested in form of vibrations. Signals generated driving wheels can be analyzed frequency spectrum tractor drawbar pull. The paper presents analysis a pull signal equipped two types special and standard tires. Beside evaluation wheels’ properties according to power, spectra measured signals were using fast Fourie...

A numerical study was conducted using the discrete element method (DEM) to investigate the performance and mobility impacts of rough terrain operation for small unmanned ground vehicles. The DEM simulation was validated using experimental data from two types of single-wheel tests previously published in the literature: straight-line locomotion over flat, level soil, and wheel-digging. Results f...

in this paper, downlink resource allocation for a sparse code multiple access (scma) based heterogeneous  cellular networks (hcn) is investigated. the main aim of this paper is to obtain joint power allocation and codebook assignment to achieve the least total system transmit power. in this regard, the proposed objective function is formulated as total transmit power subject to users minimum ra...

This paper presents the results obtained by INMA Bucharest, following a research project, in which technology for harvesting and storing industrial hemp was developed. The equipment green stalks intended this tested an experimental plot grown with Dacia - Secuieni hemp. Operating indices (actual torque at power take-off, traction force drawbar, total effective to operate equipment, working spee...

in this paper, we consider a cooperative cognitive radio network in which there is an ofdm primary link and multiple single carrier secondary links.the primary link is required to maintain its secrecy rate above a predefined threshold. if the secrecy rate requirement is not satisfied, the secondary system help primary link to maintain its secrecy rate requirement. in doing so, the secondary trans...

Bearing defects are one of the most important mechanical sources for vibration and noise generation in machine tool spindles. In this study, an integrated finite element (FE) model is proposed to predict the vibration responses of a spindle bearing system with localized bearing defects and then the sensor placement for better detection of bearing faults is optimized. A nonlinear bearing model i...