Nowadays, mobile power vehicles (MPV) equipped with ultra-low pressure tires are widely used in agriculture when conducting field work in the early spring. For these power vehicles the funda-mentally new wide-profile tires with low load capacity were developed. Its features are ultra-low intra-tire pressure (10-80 kPa), increased profile width, low ply rating (2-4), high elasticity and soil-covering tread, which in turn provide the necessary traction qualities. Due to the high elasticity of these tires and the relative radial deflection (up to 25 %), the contact area of the tire with the soil increases and the specific pressure decreases. It was determined that due to the cost parameters, a wide range of ultra-low pressure tires, as well as specific features of the tests, they remain insuffi-ciently studied at the moment. In this regard, authors conducted bench tests and determined the basic and traction characteristics of the ultra-low pressure tire with a dimension of 1020×420-18 of Bel-79 model. The equations for the dependence of tire performance on various factors were de-rived. It was found out that when driving on a concrete supporting base, the traction properties of the tire improve with the increase of the internal pressure of the tire and the load on the wheel, but when driving on the field prepared for sowing, the improvement of support-coupling indicators is observed with a decrease of the internal pressure of the tire and the load on a wheel. It was noted that the results of the tests can be used as reliable initial data for the development of mathematical models of the movement of various mobile power vehicles equipped with ultra-low pressure tires.
Nowadays, there are many technical and technological solutions to increase productivity in agriculture. One of such solutions is the use of the latest robotic mobile systems that can increase agricultural productivity. For the implementation of these decisions, sound concepts are needed to create control systems for agricultural unmanned mobile energy devices based on an analysis of current trends in the development of robotic mobile energy devices. This paper discusses various areas of the concept of creating unmanned control systems for a mobile energy device - a combine harvester, ensuring high-quality performance of technological operations of harvesting, including the directional stability of the combine harvester. The most effective version of the concept of creating a control system was selected.
The development of robotic and unmanned mobile energy facilities (MEF) is a priority for the development of agricultural production worldwide. In order for the MEF to become unmanned, it must be equipped with an automatic control system that allows you to control the MEF without human intervention. To develop algorithms for the control action and reactions of the control system, as well as to identify and eliminate its incorrect operation, it is necessary to create specialized stationary stands. The stands should simulate the real working conditions of unmanned MEF with maximum accuracy. This article presents the concept of creating a simulation stand for testing the control system of an unmanned combine harvester, which allows you to analyze the operation of the control system in conditions as close as possible to real ones. A functional diagram of the stand and hydraulic circuits of individual simulation units are presented, which should become the basis for the development of the stand design as a whole.
Based on CO2 pollution problem in order to performance speed traction characteristics for further robotic of mobile energy-related vehicle analyze of conversion agricultural machinery to electric and electromechanical transmission. Explores options for receive clear energy from renewable energy.
To assess the effectiveness of the robotization of mobile energy means (RMES), it is necessary to consider many quality criteria and functional limitations that characterize the work of RMES (operational, economic, functional, etc.). The formation of quality criteria allows us to justify the effectiveness of the robotization of MES, the improvement of the multi-criteria optimization apparatus and the software package for performing optimization calculations considering the aspect of robotization of mobile power facilities for agricultural purposes in crop production. However, unfortunately, most of the quality criteria cannot be formalized, that is, it is not always possible to establish mathematical dependencies of these quality criteria on variable parameters. In this regard, the purpose of these studies is to solve the problem of assessing the weight of each quality criterion and functional limitations, including using expert methods
This article focuses on the conditions for the safe operation of low-tonnage road trains (hereinafter LTRT) with trailers which are platforms with load capacities up to 3 tons that transport agricultural machines, mini-plants, and other equipment as well as tourist cabins. There are numerous risks in transporting such trailers that can occur due to a small turning radius or emergency braking. To assess the results of the research and experiments on the safe operation of LTRT with trailers, we used the works of the following scholars: Godjaev, Izmaylov, Komarov, Korolyash, Volchkov, Maloletov. As a result, we developed and tested a mechanical flexible coupling device under the leadership of the “Federal Scientific Agroengineering Center VIM” and the Volgograd State Technical University’s Department of Road Transport. Certificate No 2018137360, 22.10.2018. Further research can help define critical indicators for the safe operation of LTRT with load capacities up to 3.5 tons, so calculate the speed limit at critical turns, emergency braking, and reversing.
The problems of product quality and competitiveness are typical in the modern world. The inter-national market constantly demands the improvement of the performance properties of automobiles, tractors, agricultural machinery and other types of mobile vehicles. At the same time, they can not be increased without significant improving of the tire performance characteristics. Pneumatic tires are among the critical units of mobile vehicles that have a significant impact on the following per-formance properties; therefore, as a complex product, they were included in the list of approval in accordance with Regulation No 106 for agricultural vehicles and their trailers. The purpose of the research was to develop recommendations for improving the methodology of conducting certifica-tion tests of agricultural tires aimed at improving product quality. The article discusses the methods of certification and approval of tires for agricultural vehicles and their trailers. The drawbacks of the method of certification of agricultural tires using the method of automobile ones are analyzed. It is proposed to supplement the certification with test methods developed in the Russian Federation that are as close as possible to the operating conditions of agricultural vehicles and tires of traction machines. The experience of work of “Bridgestone” and “Michelin” companies in the Russian Federation is presented. The absence of a national tire certification system in Russia influence in many cases vehicle breakdowns, which lead to downtime, as well as to the occurrence of accidents. In case of serious accidents in transport, when there is insufficient clarity of the causes of the accident or it is clear that the accident is related to tire failure, the victims initiate legal proceedings against the manufacturers, involving the payment of monetary compensation. At the same time, mass production defects are usually hidden behind the losses of consumers. To improve the quality of agricultural tires, it is proposed to revise UN/ECE Regulation No 106 as close as possible to operating conditions, as well as to create an independent accredited tire center.
 ñòàòüå ïðèâåäåíà ñðàâíèòåëüíàÿ îöåíêà çíà÷åíèé ïðîèçâîäèòåëüíîñòè â ÷àñ ñìåííîãî âðåìåíè ìàøèííîòðàêòîðíûõ àãðåãàòîâ íà áàçå ñ êîëåñíûì òðàêòîðîì ÀÃÐÎÌÀØ ÒÊ-3-180, ïîëó÷åííûõ ïðè ïîëåâûõ èñïûòàíèÿõ, è ìàøèííî-òðàêòîðíûõ àãðåãàòîâ ñ ðîáîòîòåõíè÷åñêèì êîìïëåêñîì íà åãî áàçå -ïóòåì òåîðåòè÷åñêèõ ðàñ÷åòîâ. Ïðèâåäåíà ïðèíöèïèàëüíàÿ ñõåìà ðîáîòèçàöèè êîëåñíîãî òðàêòîðà òÿãîâîãî êëàññà 3. Ïîêàçàíî, ÷òî ñèñòåìà òî÷íîãî çåìëåäåëèÿ «Àãðîïèëîò» ïîçâîëÿåò îáåñïå÷èòü òî÷íîñòü âîaeäåíèÿ íå õóaeå ±0,05 ì, ìîäóëüíàÿ óíèôèöèðîâàííàÿ ñèñòåìà òåõíè÷åñêîãî çðåíèÿ «Ýäåëüâåéñ» ïîçâîëÿåò óïðàâëÿòü àâòîíîìíîé ïëàòôîðìîé, àâòîìàòèçèðîâàííàÿ ñèñòåìà óïðàâëåíèÿ ïåðåêëþ÷åíèåì ïåðåäà÷ è äèàïàçîíîâ ìîaeåò ðàáîòàòü â îäíîì èç òðåõ ðåaeèìîâ: ïîëíûé àâòîìàò, ïîëóàâòîìàò è ðó÷íîé ðåaeèì, áîðòîâàÿ èíôîðìàöèîííî-óïðàâëÿþùàÿ ñèñòåìà âåðõíåãî óðîâíÿ îáåñïå÷èâàåò àâòîìàòè÷åñêîå óïðàâëåíèå ìàøèííî-òðàêòîðíûì àãðåãàòîì â áåñïèëîòíîì ðåaeèìå íà ïðîòÿaeåíèè âñåé ñìåííîé ðàáîòû. Ðàññìîòðåíî âëèÿíèå òåõíè÷åñêîãî óðîâíÿ òðàêòîðà íà åãî ïðîèçâîäèòåëüíîñòü, ðàáî÷óþ ñêîðîñòü è êîýôôèöèåíò ñìåííîñòè.  ðåçóëüòàòå èññëåäîâàíèé âëèÿíèÿ òåõíè÷åñêîãî óðîâíÿ ýëåìåíòîâ òðàêòîðà íà ñìåííóþ ïðîèçâîäèòåëüíîñòü âûÿâëåíî, ÷òî êîíñòðóêöèÿ òðàêòîðà ìîaeåò äàòü ïðèðîñò ê ïðîèçâîäèòåëüíîñòè äî 37,2 %. Êëþ÷åâûå ñëîâà: êîëåñíûé òðàêòîð, ÷àñîâàÿ ñìåííàÿ ïðîèçâîäèòåëüíîñòü, òåõíè÷åñêèé óðîâåíü, êîýôôèöèåíò ñìåííîñòè, ðàáî÷àÿ ñêîðîñòü àãðåãàòà.The article presents a comparative assessment of the per hour shift working performance of wheeled tractor, which were obtained by theoretical calculations during field trials and machine-tractor units based on a Agromash TK-3-180 wheeled tractor with a robotic complex. A schematic diagram of the robotization of a wheeled tractor of traction class 3 is given. It is shown that «Agropilot» precision agriculture system ensures driving accuracy no worse than ± 0,05 m, the «Edelweiss» modular unified technical vision system allows to control an autonomous platform. The automated control system for shifting gears and ranges can operate in one of three modes: full automatic, semi-automatic and manual. The upper-level onboard information and control system provides automatic control of the machine-tractor unit in unmanned mode throughout the shift work. The influence of the technical level of the tractor on its performance, working speed and shift factor is considered. As a result of studies of the influence of the technical level of the tractor elements on the shift performance, it has been revealed that the design of the tractor can give an increase in productivity to 37,2 %.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.