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### Прегледај по Аутор "Tica, Milan"

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- СтавкаANALYSIS OF GEAR RATIOS OF TWO DIFFERENT TYPES OF CYCLOID DRIVE TRAIN(Mašinski fakultet, Univerzitet Istočno Sarajevo, 2022) Tica, Milan; Mačkić, Tihomir; Marjanović, Nenad; Troha, Sanjin; Milutinović, Miroslav; Golubović, Dušan; Milutinović, Miroslav; Prodanović, Saša
Прикажи више The cyclo drive train is a special variant of the planetary drive train, where the planets are gears with a cycloid profile, while rollers are placed on the central gears (wheels). An analysis of the gear ratios of two types of cycloid drive train was performed. The first type is a classic cycloid drive train, while the second is a special variant with stepped planets. The cycloid drive with stepped planets can achieve very large gear ratios, while using central gears with a relatively small number of rollers.Прикажи више - СтавкаAnalysis of Power Losses in Constrained Cycloid Drive(Sveučilište u Slavonskom Brodu, Stojarski fakultet, 2023) Mačkić, Tihomir; Marjanović, Nenad; Tica, Milan; Troha, Sanjin; Milutinović, Miroslav; Rašović, Nebojša; Raos, Pero
Прикажи више The aim of this paper is to present a theoretical model for efficiency evaluation of a simple cycloid drive train with one degree of freedom (DOF) or constrained cycloid drive. In order to evaluate the efficiency, it is necessary to find the losses generated in the simple cycloid drive, where only losses depending on the load were considered. Expressions for determining speed ratios, efficiency, velocities and forces acting inside the cycloid drive are presented. These expressions are implemented in the theoretical model, where the places where the losses occur are defined. A computer program was created to facilitate analysis and obtain loss values based on different input data. Only load-dependent losses were considered in the theoretical model and computer program. In order to verify the theoretical model, experimental measurements were performed. A physical model of the simple cycloid drive train was created and analyzed on the test bench. The results for "S1" operating mode, i.e. when shaft 2 is stopped, show a mean value of the efficiency of 63.49%, for experimental measurements, while the mean value for theoretical analysis is 65.25%. For the operating mode "S2", i.e. with shaft 1 stopped, the mean value of the experimental measurements of the efficiency is 60.9%, while the theoretical mean value is 62.82%.Прикажи више - СтавкаAnalysis of the Shifting Capabilities of Planetary Gear Trains with Coplanar Planet Gearsets(Technical University of Sofia, 2023) Vrcan, Željko; Troha, Sanjin; Marković, Kristina; Tica, Milan; Milutinović, Miroslav; Mitrev, Rosen
Прикажи више This paper deals with the comparison of two different simple planetary gearsets. The first type is a 2k-h, variant A geartrain, while the other is a simple planetary gearset with coplanar paired planets. Methods for the kinematic synthesis of both gear trains are explored, together with the analysis of the transmission ratios that can be achieved by the gearsets. Both gear trains are analysed for the possibility of operating as a reversing gear train within their design limitations. The type with paired planets is of particular interest, as it can be built in a configuration that will have a transmission ratio of -1. This also enables compound gear trains having equal transmission ratios in both directions of rotation of the output shaft to be built.Прикажи више - СтавкаApplication of Two-Carrier Planetary Gear Trains to Shifting Gearboxes(Technical University of Sofia, 2023) Troha, Sanjin; Vrcan, Željko; Marković, Kristina; Tica, Milan; Milutinović, Miroslav; Mitrev, Rosen
Прикажи више This article deals with two-carrier planetary gearsets having two connecting and two external shafts, which may operate as two-speed gearboxes when brakes are placed on two external shafts. Analysis of the S16WN(S/E) gearbox is performed using the torque method, the specific torques are determined on all shafts, and then used to calculate both transmission ratios. The kinematic scheme of the gearbox has been synthesized, and the relative power flows have been identified. Efficiency functions are calculated for both gear ratios. The graphical representation of the transmission ratio functions for both gear ratios was used to obtain the diagram of the shifting capabilities of the S16WN(S/E) gearbox. The importance and utility of such diagrams and the relevant equations for the determination of ideal torque ratios of the component gear trains is explained. The size of the transmission ratio domain suggests that the S16WN(S/E) gearbox has a wide area of possible applications.Прикажи више - СтавкаReliability Evaluation of Transmission Planetary Gears “bottom-up” approach(Polish Maintenance Society, 2023) Živković, Predrag; Milutinović, Miroslav; Tica, Milan; Trifković, Spasoje; Čamagić, Ivica; Niewczas, Andrzej
Прикажи више The reliability study is the most important part of the engineering design process, as it is the basis of analysis and assessment of future product performance in exploitation. Since performance cannot be predicted with absolute certainty, the application of reliability theory includes probability theory and unreliability modeling. The proposed approach has been applied to assess the reliability of gear planetary power transmissions. The assessment of system reliability was determined on the basis of the block diagram method, as a function of the reliability of individual components, calculated by statistical analysis. Using the Weibull model, the reliability of the planetary gear was defined on the basis of the probability of failure of the gear teeth and the results were interpreted to assess the reliability of the component and the entire planetary train. For a more precise assessment of reliability and to avoid modeling every failure and mode of occurrence, a competitive risk model was developed. The reliability assessment study was conducted with a “bottom-up” approach. Reliability has been assessed, for instantaneous, estimated and assigned failures rate of planetary train and component.Прикажи више