Investigations of the Dynamics of a Four-Element Machine-and-Tractor Aggregate

Bulgakov, Volodymyr; Ivanovs, Semjons; Аdаmchuk, Valerii; Antoshchenkov, Roman

doi:10.2478/ata-2019-0026

Cited by 14 publications

(10 citation statements)

References 7 publications

(8 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For theoretical studies and oscillation calculations, the tractor and unit design elements are schematized and simplified taking into account the fact that the elements that have little effect on the behavior of the oscillating system are generally not considered [5]. It should be noted that the influence of various profiles of the bearing surface on oscillatory processes has not been studied.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

“…The proposed mathematical wheel model (5) takes into account skidding δ k and its dependence on the tangential force P k acting on the wheel as well as dr k , dynamic deformation of the wheel in the vertical direction, which is calculated programmatically in study [5].…”

Section: Dynamic and Mathematical Model Of The Wheelmentioning

confidence: 99%

“…The method of forming equations of dynamics of multi-element machines with an arbitrary arrangement of elements (8)- (17) has proven its effectiveness [5,7].…”

Section: Dynamic and Mathematical Model Of The Wheelmentioning

confidence: 99%

See 2 more Smart Citations

Estimating the dynamics of a machine-tractor assembly considering the effect of the supporting surface profile

Galych

Antoshchenkov

et al. 2021

EEJET

Self Cite

View full text Add to dashboard Cite

Results of theoretical studies of dynamics of the machine-tractor assembly taking into account the influence of a bearing surface profile were presented. It was established that in the course of operation, the machine-tractor assembly is exposed to a number of external factors leading to a change of vertical loads on the chassis and the engine. Mathematical models of dynamics of a tractor and a machine and a tractor unit consisting of a tractor of pivotally connected arrangement and a trailed sower were constructed. Such models make it possible to study dynamics and oscillatory processes of multi-element units. A mathematical model of tractor wheel dynamics was formed. Speeds and angles of orientation of elements of the machine-tractor assembly in space were determined. Influence of profile of the bearing surface on the unit elements when moving in the field prepared for sowing and the field after plowing was calculated. Theoretical studies of the influence of the bearing surface profile on dynamics of the machine-tractor assembly were performed on the example of KhTZ-242K tractor and Vega-8 Profi sower (Ukraine). When moving, the sower frame has a smaller amplitude of vibration accelerations than that of the tractor. Accordingly, the tractor has higher oscillation energy because it rests on the ground through its wheels having appropriate stiffness. The sower moves with its working bodies immersed into the soil which leads to a decrease in the amplitude of oscillations. The highest energy of amplitude of oscillation accelerations of the sower frame in the vertical direction was observed at frequencies of 15.9; 23.44; 35.3 and 42.87 Hz. It was found that the increase in working speeds of agricultural units leads to the fact that oscillations of all components reach significant values. This entails an increase in dynamic loads on soil and, as a consequence, its compaction

show abstract

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Section: Dynamic and Mathematical Model Of The Wheelmentioning

confidence: 99%

See 1 more Smart Citation

Estimating the dynamics of a machine-tractor assembly considering the effect of the supporting surface profile

Galych

Antoshchenkov

et al. 2021

EEJET

Self Cite

View full text Add to dashboard Cite

show abstract

“…Crop yield can be increased by use of higher processing speeds [1], or machines with high working width, at least 4-6 m, or even up to 9-12 m with a system of folding frames [2][3][4]. High performance seed drills and soil tilling and sowing machines are most commonly applied in sowing [5]. They use integrated soil cultivation [6], application of which involves control of the piping system and colter clogging [7] as well as monitoring the amount of seeds to be sowed which is of key importance in precision farming systems [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Optimization of the Sowing Unit of a Piezoelectrical Sensor Chamber with the Use of Grain Motion Modeling by Means of the Discrete Element Method. Case Study: Rape Seed

et al. 2022

View full text Add to dashboard Cite

Nowadays, in the face of continuous technological progress and environmental requirements, all manufacturing processes and machines need to be optimized in order to achieve the highest possible efficiency. Agricultural machines such as seed drills and cultivation units are no exception. Their efficiency depends on the amount of sowing material to be used and the patency of seed transport tubes or colters. Most available control systems for seed drills are optical ones whose operation is not effective when working close to the ground due to large dusting. Thus, there is still a need to provide seed drills with sensors to be equipped with control systems suitable for use under conditions of massive dusting that would shorten the time of reaction to clogging and be affordable for every farmer. This study presents an analysis of grain motion in the sowing system and an analysis of the operation efficiency of an original piezoelectric sensor with patent application. The novelty of this work is reflected in the new design of a specially designed piezoelectric sensor in the sowing unit, for which an analysis of indication errors was carried out. A seed arrangement of this type has not been described so far. An analysis of the influence of the seed tube tilt angle and the type of its exit hole end on the coordinates of the grain point of collision with the sensor surface and erroneous indications of the amount of sown grains identified by the piezoelectric sensor is presented. Low values of the sensor indication errors (up to 10%), particularly for small tilt angles (0° and 5°) confirm its high grain detection efficiency, comparable with other sensors used in sowing systems, e.g., photoelectric, fiber or infrared sensors and confirm its suitability for commercial application. The results presented in this work broaden the knowledge on the use of sensors in seeding systems and provide the basis for the development of precise systems with piezoelectric sensors.

show abstract

“…In general, there is a tendency to use soft calculation techniques. Trailer systems have been studied in terms of nonlinear control theory (Bulgakov et al, 2017;Bulgakov et al, 2019). Initial research in the field of non-holonomic mobile robots has been extended to automotive-like robot applications.…”

mentioning

confidence: 99%

The Control Reversing Algorithm for Autonomous Vehicles with PSD-Controlled Trailers

Cviklovič

Srnánek

Hrubý

et al. 2021

Acta Technologica Agriculturae

View full text Add to dashboard Cite

Driving a vehicle with a passive trailer has been the subject of numerous studies. Current control strategies are mostly used by differential geometry, linear algebra, fuzzy regulators, and artificial neural networks. The objective of this study is to design an algorithm for autonomous control of the tractor-trailer system reversing based on an algorithm using a PSD controller and to verify it on a simulated mathematical model. All parameters listed in the models and experiments are performed based on the existing tractor-trailer system. Dynamic models of steering and velocity control were identified and incorporated into the simulation. Result includes a stable operation of the steering without oscillating. The proposed algorithm can be implemented in microcontrollers without the need for high computing power.

show abstract

Investigations of the Dynamics of a Four-Element Machine-and-Tractor Aggregate

Cited by 14 publications

References 7 publications

Estimating the dynamics of a machine-tractor assembly considering the effect of the supporting surface profile

Estimating the dynamics of a machine-tractor assembly considering the effect of the supporting surface profile

Optimization of the Sowing Unit of a Piezoelectrical Sensor Chamber with the Use of Grain Motion Modeling by Means of the Discrete Element Method. Case Study: Rape Seed

The Control Reversing Algorithm for Autonomous Vehicles with PSD-Controlled Trailers

Contact Info

Product

Resources

About