SELECTION OF RATIONAL PARAMETERS FOR THE WHEEL DRIVE OF MULTI-AXLE WHEELED VEHICLES

2019 ◽  
pp. 28-35
Author(s):  
Valery Vladimirovich Guskov ◽  
Aleksandr Sergeyevich Povarekho
Keyword(s):  
Wheel Drive ◽  
Wheeled Vehicles ◽  
Selection Of

Propulsion Dynamic Requirements Analysis for Multi-Axle Skid-Steer Wheeled Vehicles

2020 ◽  
Author(s):  
Mostafa Yacoub ◽  
Ahmed Ali
Keyword(s):  
Experimental Validation ◽  
Worst Case ◽  
Wheeled Vehicle ◽  
Wheel Drive ◽  
System Requirements ◽  
Turning Radius ◽  
Four Wheel Drive ◽  
Driving Torque ◽  
Wheeled Vehicles ◽  
Selection Of

Abstract Multi-axle skid-steer wheeled vehicles have the advantages of simplicity and enhanced traction. That’s why they are used in off-road environments and also in mobile robots. In the present work, a dynamic analysis of the propulsion system requirements for multi-axle wheeled vehicles is investigated. As the multi-axle wheeled vehicle differentially steers at a smaller turning radius, the driving torque requirements approach their peak. The adhesion at each tire of the multi-axle vehicle and its relation to the contact patches are analyzed. The analysis presented starts with four wheel drive, six wheel drive and eight wheel drive vehicles, then it is widened to n-wheel drive vehicles. A generic formula for obtaining the propulsion torque requirements for multi-axle skid-steer wheeled vehicles is presented. The analysis is extended to include experimental validation of the obtained analytical results. The experimental work includes three small electrically driven skid-steer vehicles; four wheel drive vehicle, six wheel drive vehicle and eight wheel drive vehicle. The selection of the drive motors for each of those vehicles was based on the proposed formula. Each of the three vehicles was tested in the worst case adhesion torque requirement. The experimental results showed that the proposed formula is capable, to a great extent, to predict the torque requirements for the multi-axle skid-steer wheeled vehicles in the design phase.

Catacomb culture wagons of the Eurasian steppes

Antiquity ◽  
2014 ◽  
Vol 88 (340) ◽  
pp. 378-394 ◽  
Author(s):  
N.I. Shishlina ◽  
D.S. Kovalev ◽  
E.R. Ibragimova
Keyword(s):  
Stable Isotope ◽  
Isotope Analysis ◽  
Burial Mound ◽  
Careful Selection ◽  
Southern Russia ◽  
The Subject ◽  
The Individual ◽  
Wheeled Vehicles ◽  
Selection Of ◽  
Catacomb Culture

The origin and development of wheeled vehicles continues to fascinate today no less than when Stuart Piggott (1974) first wrote about the subject inAntiquity40 years ago. A growing number of examples from the steppes of southern Russia and Ukraine are providing new insights into the design and construction of these complex artefacts. A recent example from the Ulan IV burial mound illustrates the techniques employed and the mastery of materials, with careful selection of the kinds of wood used for the wheels, axles and other elements. Stable isotope analysis of the individual interred in this grave showed that he had travelled widely, emphasising the mobility of steppe populations.

Architecture and Hydraulics of a Lower Extremity Exoskeleton

2005 ◽  
Author(s):  
Adam Zoss ◽  
H. Kazerooni
Keyword(s):  
Lower Extremity ◽  
Degrees Of Freedom ◽  
Hardware Design ◽  
Human Intelligence ◽  
Rough Terrain ◽  
Performance Measurements ◽  
Hydraulic Actuators ◽  
Wheeled Vehicles ◽  
Selection Of

Wheeled vehicles are often incapable of transporting heavy materials over rough terrain or up staircases. Lower extremity exoskeletons supplement human intelligence with the strength and endurance of a pair of wearable robotic legs that support a payload. This paper summarizes the design and analysis of the Berkeley Lower Extremity Exoskeleton (BLEEX). The anthropomorphically-based BLEEX has seven degrees of freedom per leg, four of which are powered by linear hydraulic actuators. The selection of the degrees of freedom, critical hardware design aspects, and initial performance measurements of BLEEX are discussed.

Optimal Design for Cutting Mechanism of the Sugarcane Planting

2012 ◽  
Vol 271-272 ◽  
pp. 589-593
Author(s):  
Yan Zhou Li ◽  
Qing Zhou ◽  
Wei Wang ◽  
Wei He ◽  
Lin Jun Jiang
Keyword(s):  
Cutting Force ◽  
Sugar Cane ◽  
Cutting Speed ◽  
Production Costs ◽  
Cutting Mechanism ◽  
Wheel Drive ◽  
Blade Edge ◽  
Successful Design ◽  
Selection Of ◽  
Transfer Device

In this paper, mainly according to the selection of sugar cane seeds and the quality requirements for cutting, we design a cutting mechanism not only to cut off the sugar cane , but also can ensure the cutting sugarcane planting to achieve the agronomic requirements for sugar cane . The institution's overall ideas are as follows: first,measure different kinds of sugar cane planting in different cutting force and cutting speed in case of broken head.After preliminary analysis,gain cutting force,cutting speed ,the diameter of sugar cane ,the species of sugar cane ,cutting blade edge angle, cutting angle and cutting mode correlation.Then select the power transfer device and the working parts of the disk and blade according to the obtained data.Last design drive of belt wheel, drive shaft, bearing type, bearing cover through calculation and checking.The successful design and development of the institution of sugar cane cutting mechanism will be able to greatly reduce the labor intensity and production costs in the process of sugarcane planting.

scholarly journals Refinement of the characteristics of the aerodynamic resistance to the movement of special wheeled chassis and tractors based on the use of computational gas dynamics methods

2021 ◽  
Vol 7 (3) ◽  
pp. 270-279
Author(s):  
V.I. Tarichko ◽  
◽  
P.I. Shalupina ◽  
Keyword(s):  
Gas Dynamics ◽  
Aerodynamic Drag ◽  
Aerodynamic Resistance ◽  
Cfd Modeling ◽  
Modeling Methodology ◽  
Calculation Results ◽  
Aerodynamic Drag Coefficient ◽  
Wheeled Vehicles ◽  
Selection Of ◽  
Preliminary Selection

An accurate assessment of the characteristics of the aerodynamic resistance to movement is important for the preliminary selection of the parameters of the engine, transmission and chassis of a special wheeled chassis or tractor. The strength of the movement resistance affects the dynamic characteristics of the car. The existing calculation methods allow for a wide variation of the aerodynamic drag coefficient, which complicates the task of preliminary selection of car parameters. The purpose of this article is to clarify and develop the engineering methodology for carrying out traction-dynamic calculations of special wheeled vehicles and tractors based on the results of computer modeling performed using computational fluid and gas dynamics (CFD modeling) methods. The modeling methodology and calculation results of a special wheeled chassis manufactured by JSC «BAZ» are considered.

scholarly journals Pengujian Perbandingan Ketahanan Berbagai Busi Sepeda Motor dengan Menggunakan Alat Busi Tester

2021 ◽  
Vol 8 (1) ◽  
pp. 213-221
Author(s):  
Indra Hasan ◽  
Denur
Keyword(s):  
Combustion Chamber ◽  
Spare Parts ◽  
Comparative Test ◽  
Maximum Performance ◽  
Ignition System ◽  
Automotive Technology ◽  
Spark Plug ◽  
Wheeled Vehicles ◽  
Selection Of ◽  
Sophisticated Technology

The development of automotive technology is very fast, we can find this in today's vehicles that use a lot of very sophisticated technology, namely in terms of engines, electricity, and its newest features, especially on two-wheeled vehicles. Therefore, the user community is required to be more selective in choosing a vehicle both in terms of quality and quantity. Including in the selection of spare parts on vehicle engines must use good quality, this is useful as a motorbike power booster, especially in the ignition system, namely spark plugs as a vital tool that sprinkles sparks in the combustion chamber. Recently, many spark plugs have been found that are not good enough so that the power generated by the vehicle is reduced. The purpose of this test is as a Comparative Test of the Endurance of Various Motorcycle Spark Plugs by Using a Spark Plug Tester so that it can be seen that the spark plug is suitable or not used in the vehicle which aims to get maximum performance.

Series, Parallel, and Hybrid Series-Parallel Hydrostatic Transmission Architectures for Ground Locomotion

2019 ◽  
Author(s):  
Massimo Martelli ◽  
Pietro Marani ◽  
Silvia Gessi
Keyword(s):  
Numerical Simulation ◽  
Hydraulic System ◽  
Electronic Control ◽  
Hydraulic Circuit ◽  
Virtual Experiments ◽  
Hydrostatic Transmission ◽  
Wheel Drive ◽  
Performance Specifications ◽  
Wheeled Vehicles ◽  
Different Levels

Abstract Ground locomotion of wheeled vehicles, in all-wheel drive configuration, is subject to unique, generally highly variable and not predictable, loading conditions on the driveline subsystem. Any sensible design must cope at least with the effects induced by slope changes, asymmetrical losses of adherence and cornering maneuvers. When severe constraints on the driveline layout make the implementation of standard mechanical transmissions unfeasible, a typical option is given by compound hydrostatic transmission architectures, with multiple dedicated motor-wheels. Requirements are then defined on two different levels: at vehicle level, traction functionality must never be lost; at hydraulic circuit level, all components must work within their nominal operating ranges and hydraulic stresses must be limited. Common standard topologies for motor connection, viz. series and parallel, come with different strengths and weaknesses, often requiring the implementation of auxiliary highly dissipative compensation components and/or complex electronic control, while a hybrid series-parallel concept, derived from a patented application, based on three-port motors allows the implementation of an effective, purely hydraulic system. In the present work, a general comparison of the above-mentioned architectures is provided, by means of numerical simulation, over a wide set of virtual experiments. Each architecture is analyzed: its specific features are described and the correlation between hydraulic performance/specifications and vehicle traction performance is pointed out.

scholarly journals Selection of the combat vehicle individual wheel drive operation modes under required mobility criteria

2020 ◽  
Vol 820 ◽  
pp. 012006
Author(s):  
G Kotiev ◽  
B Padalkin ◽  
A Miroshnichenko ◽  
A Stadukhin ◽  
B Kositsyn
Keyword(s):  
Operation Modes ◽  
Wheel Drive ◽  
Combat Vehicle ◽  
Selection Of

Roller test bench with kinematic misalignment of running drums

2020 ◽  
pp. 7-11
Author(s):  
I.P. Troyanovskaya ◽  
I.S. Jitenko
Keyword(s):  
Mathematical Model ◽  
Closed Loop ◽  
Test Bench ◽  
Bench Tests ◽  
Different Types ◽  
Wheeled Vehicles ◽  
Power Analyses ◽  
Selection Of

A roller test bench with a rigid kinematic connection between running drums for testing of wheeled vehicles is studied. A mathematical model of the bench is developed. Its force, kinematic and power analyses were performed. Recommendations on the selection of gear ratios for different types of tests of wheeled vehicles are given. Keywords roller bench, closed loop, running drums, kinematic mismatch, power circulation, bench tests

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