Radu Vilău
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View article: Investigation of Bearing Condition by Means of Robust Linear Regression and Informative Predictors
Investigation of Bearing Condition by Means of Robust Linear Regression and Informative Predictors Open
This study addresses the condition monitoring of rolling bearings by applying robust linear regression to statistically derived features from vibration data. Four datasets of acceleration signals were collected under varying operating cond…
View article: Investigating Vibration Transmission in Cargo Containers During Heavy-Duty Off-Road Transport
Investigating Vibration Transmission in Cargo Containers During Heavy-Duty Off-Road Transport Open
This article focuses on the investigation and analysis of vibrations transmitted to cargo during off-road transportation, with particular emphasis on the impact of vehicle and road surface interactions. The primary objective of the researc…
View article: Application of Logistic Regression to Analyze The Economic Efficiency of Vehicle Operation in Terms of the Financial Security of Enterprises
Application of Logistic Regression to Analyze The Economic Efficiency of Vehicle Operation in Terms of the Financial Security of Enterprises Open
Background: A measurable feature of the efficiency of vehicle use in transportation companies is the revenue from transport orders, which has a significant impact on their profitability. Therefore, it is important to skillfully analyze the…
View article: Application of machine learning methods to analyze customer migration risk in terms of corporate financial security
Application of machine learning methods to analyze customer migration risk in terms of corporate financial security Open
Effective prediction of customer migration is only possible through knowledge of the customer life cycle, which is characterized by the length of the relationship between buyer and provider, i.e. customer retention. A concept of opposite i…
View article: Frequency Analysis of Vibrations in Terms of Human Exposure While Driving Military Armoured Personnel Carriers and Logistic Transportation Vehicles
Frequency Analysis of Vibrations in Terms of Human Exposure While Driving Military Armoured Personnel Carriers and Logistic Transportation Vehicles Open
Military heavy vehicle drivers experience low-frequency vibrations that are associated with fatigue, drowsiness, and other adverse health effects. The existing research papers focus on performing different types of analysis, but few use ad…
View article: Bearings fault detection by means of frequency analysis
Bearings fault detection by means of frequency analysis Open
The present paper aims to analyse the possibility to prevent machine failure due to bearing faults, with the use of frequency analysis. The experimental research consisted in mounting a simple mechanical transmission, integrating an electr…
View article: Study regarding the influence of geometrical characteristics of the distribution system on truck engines efficiency parameters
Study regarding the influence of geometrical characteristics of the distribution system on truck engines efficiency parameters Open
The present paper aims to analyze the influence of certain parameters specific to the distribution systems on a truck engine performance. The research is focused on how the change in the shape of lobes of a camshaft can influence the vehic…
View article: Graphical Methods Used to Solve Misalignment Problems of Mechanical Transmissions
Graphical Methods Used to Solve Misalignment Problems of Mechanical Transmissions Open
This paper presents some graphical methods used to solve different misalignment problems
\nof mechanical transmissions. For this purpose, it was created a mechanical transmission composed of
\nan electric motor with a driving shaft, a coup…
View article: Developing a Pneumatic Actuating System to Illustrate the Functioning of an AND Logic Valve
Developing a Pneumatic Actuating System to Illustrate the Functioning of an AND Logic Valve Open
This paper presents the functioning of an AND logic valve, by developing a
\npneumatic model in the FluidSim modelling-simulation program. Also, the research by
\nsimulation will constitute the basis for implementing and developing on a te…
View article: Experimental Plotting of Static Characteristics of Rotary Hydraulic Pumps
Experimental Plotting of Static Characteristics of Rotary Hydraulic Pumps Open
Present paper presents the experimental plotting of static characteristics such as flow-pressure and flow-speed-pressure in case of rotary hydraulic pumps. Theoretically, a hydraulic pump with constant flow can work up to nominal pressure …
View article: Analyzing Surface Roughness of an Auto-Truck Cylinder After Several Running Hours
Analyzing Surface Roughness of an Auto-Truck Cylinder After Several Running Hours Open
Present paper aims to present the measuring process and results regarding roughness of the inner surface of a truck cylinder, according to standard (STAS 6635-87). To that purpose, it was used a Surtronic SSeries roughness tester, with a s…
View article: Experimental research and simulation of vibration isolation elements mounted within transport boxes
Experimental research and simulation of vibration isolation elements mounted within transport boxes Open
Military vehicles, destined either for transportation of goods and personnel, or for battle missions, move in most situations on unpaved roads. Average movement speed is limited by suspension performances, which have to ensure a constant c…
View article: Considerations regarding the influence of inappropriate electronic throttle unit operation on pollutant emissions of internal combustion engines
Considerations regarding the influence of inappropriate electronic throttle unit operation on pollutant emissions of internal combustion engines Open
The quality of the fuel mixture in the cylinders of an internal combustion engine is determined by the electronic control unit based on the co-operating information with the electronic throttle unit. For this reason, any malfunction of the…
View article: Study the parameters of a petrol engine using analysis of variance
Study the parameters of a petrol engine using analysis of variance Open
This paper presents o method to analyse the influence of various parameters on spark ignition engine operation. The mathematical tool it was used is analysis of variance. Based on statistical data, analysis of variance is a method of study…
View article: Theoretical and experimental considerations regarding to functioning of a combat vehicle shutter’s hydraulic actuation system
Theoretical and experimental considerations regarding to functioning of a combat vehicle shutter’s hydraulic actuation system Open
The paper proposes a theoretical analysis of kinematic and dynamic performances of several elements in the composition of a combat vehicle shutter's hydraulic system, using LMS AMESim, specialized CAE software.
View article: Statistical models of petrol engines vehicles dynamics
Statistical models of petrol engines vehicles dynamics Open
This paper focuses on studying statistical models of vehicles dynamics. It was design and perform a one year testing program. There were used many same type cars with gasoline engines and different mileage. Experimental data were collected…