RESEARCH OF ACCELERATION MACHINE-TRACTOR UNIT WITH HYDROCONTROLLED TRANSMISSION WHEN PERFORMING TRANSPORT WORK
Journal Title: Вестник Харьковского национального автомобильно-дорожного университета - Year 2019, Vol 85, Issue
Abstract
Nowadays, in the process of selecting modern agricultural machinery, there is a problem to choose the necessary power-unit. An overview of different types of transmissions used in the designing of a modern wheeled tractor is presented. Stepped mechanical transmissions (with gear shifting by moving gears, stepped synchronized, with gear shifting under pressure of hydraulic friction clutches) and stepless mechanical transmissions (hydromechanical, hydraulic-mechanical, electromechanical and a transmission device comprising a variator) are presented. The advantages and disadvantages of using certain types of transmissions are emphasized. It has been established that the most rational type of transmis-sion is mechanical with gear shifting with the help of hydraulic friction clutches. It is caused by the convenience of an operator-driver’s work and con-struction safety demands are met. The goal of the work is tuning of the mathematical apparatus to determining the dynamic load in a transmission, in which gear shifting is carried out by the hydraulic friction clutches, due to study of the transition pro-cess of achieving working speed of the machine-tractor unit during performing the transport work. In solving the set goal, a methodology that pro-vided the creation of a mathematical apparatus based on theoretical study of a multivariate dynamic system was used. The developed mathematical model considers the external perturbation of the road sur-face, and also the exponential form of change is used in modeling of control systems with the help of hydraulic friction clutches As a result, a mathemati-cal model of the acceleration process of a wheeled machine-tractor unit during transport work is ob-tained, with the help of which it is possible to evalu-ate the criteria of acceleration qualities of a vehicle with a transmission, in which gear shifting is carried out under load due to the hydraulic friction clutch. The originality novelty is to obtain further development of the mathematical model of a machinetractor unit with a transmission, in which gear shifting takes place with the help of hydraulic friction clutches in the process of achieving the working speed. The practical value of the work is in the recommendations on the use of one or another combination of engaging of friction clutches. The given recommendations are based on the analysis of acceleration characteristics, namely the work of hitching and the dynamic load index on the input elements of the gearbox.
Authors and Affiliations
B. Kalchenko, A. Kozhushko, E. Pelipenko
Keywords
Related Articles
- EP ID EP647068
- DOI 10.30977/BUL.2219-5548.2019.85.0.14
- Views 109
- Downloads 0
ОЦЕНКА ДОПОЛНИТЕЛЬНОЙ ПОГРЕШНОСТИ РЕЗУЛЬТАТОВ ИМИТАЦИОННОГО МОДЕЛИРОВАНИЯ ИНФОРМАЦИОННО-ТЕЛЕМАТИЧЕСКИХ СИСТЕМ
Проведен анализ источников дополнительной погрешности результатов имитационного моде-лирования информационно-телематических систем, обусловленных форматом представления вещественных данных в памяти компьютера и реализаци...
DEFINITION OF CONCEPTS «CONTROLLABILITY OF CARS» AND «CAR DRIVING» IN SYSTEM «DRIVER–CAR–ROAD»
System representation of concepts «controllability of cars» and «car driving» from the point of view of cybernetics as well as information and automatic control theory is offered.
ADAPTABILITY TO SERVICE OF ROAD-BUILDING MACHINES IN MODULAR DESIGN
The classical methods of designing of road-building machines are considered. A justification of composition of road-buildind machines according to the modular principle is given. А mathematical model of assessment of the...
PROBLEMS OF SIGNAL FILTRATION IN SYSTEMS OF CONTOL AND DATA MONITORING
An algorithm for processing data coming from rotation speed sensors in real time is presented, and comparative assessment in reference to widespread filters is carried out. The advantages of data pre-processing when it i...
УПРОВАДЖЕННЯ КОМП’ЮТЕРНИХ ТЕХНОЛОГІЙ У ПРОЦЕС ПІДГОТОВКИ ФАХІВЦІВ ОПЕРАТИВНО-РЯТУВАЛЬНОЇ СЛУЖБИ
Розглянуто особливості впровадження комп’ютерних технологій у процесі вивчення дисципліни «Організація аварійно-рятувальних робіт» для підготовки фахівців оперативно-рятувальної служби Державної служби України з надзвич...