• STUDY PLANE-PARALLEL MOTION MOVEMENT COMBINED SEEDING UNIT

    Mechanization in agriculture & Conserving of the resources, Vol. 64 (2018), Issue 6, pg(s) 184-187

    Conducted analytical studies, resulted in the construction of a new mathematical model of plane-parallel motion combined simultaneous sowing unit and bandpass mineral fertilizers. If you use the original equation in the form of Lagrange II-the kind, the system was composed of six differential equations of motion, that describes the behavior of the combined unit with its plane-parallel motion. Defined analytical expressions for the forces, that act on the machine unit, can be solved on the PC.

  • BUSINESS

    INNOVATIONS IN THE PUBLIC FINANCE CONTROL – NECESSARY AND REQUIRED

    Science. Business. Society., Vol. 1 (2016), Issue 3, pg(s) 39-42

    The innovations in the public sector follow those in the business sector. The reasons are at least two – the necessary conservatism of the sector and setting-out of the initiatives of the "top". However, the introduction of innovations in the public organizations is not only necessary, but also mandatory, as it is directly related to the administrative capacity to perform effectively and efficiently their inherent functions.

    The operations with the public finances has always been the focus of public attention, which is sensitive to the way of spending taxpayers’ money. Therefore, innovation in this field should be directed towards greater transparency, control, efficiency and effectiveness. Opportunities for that exist in areas such as financial analysis, financial planning and forecasting, development of program budgets, and application of the financial management and control.

    Innovative models of public finance management are presented in the paper, with emphasis on the use of cloud technologies for ex-ante control over the spending of budget funds. Such cloud structure was probated in some Bulgarian municipalities and its effectiveness and efficiency was proven in terms of facilitation the work of financial controllers, implementation of rapid control activities, generation of checkups and reports and upgrading the confidence in the operation of control systems.

  • CONSERVING OF THE RESOURCES

    ON THE ISSUE OF REDUCING THE HARMFUL INFLUENCE OF THE MOBILE AGRICULTURAL SYSTEMS UNITS ON THE SOIL

    Mechanization in agriculture & Conserving of the resources, Vol. 63 (2017), Issue 3, pg(s) 119-121

    The article is devoted to the problem of increasing the efficiency of using mobile agricultural aggregates by reducing the impact of their running systems on the soil. The work on the efficiency of the use of mobile agricultural units based on the automobile chassis in agroindustrial production is analyzed, which shows the results of studies on the changes in their designs with the purpose of reducing the harmful influence of chassis running systems on soil. One of the ways to reduce the harmful influence of running systems of mobile agricultural units on Execution of technological operations, both in field conditions and in transport operations while driving along the road Mobile roads. The main ways that will ensure the effective use of the automobile chassis in field conditions and on highways are analyzed. It has been found that the most effective is the equipment of automobile chassis with wide – profile tires with adjustable internal air pressure and a tire – pumping control system, which makes it possible to effectively use the chassis both in the main technological operations (in the field) and in transport operations (on the roads). The influence of the air pressure in the tire of the wheel of the running system of the KrAZ – 6322 automobile chassis and the normal load on the contact area of the tire with the supporting surface and pressure on it is established. To use the automobile chassis for performing agricultural operations in field conditions, it is necessary to equip it with wide – profile tires with adjustable internal air pressure and a tire – pumping monitoring system that will reduce the negative impact on the soil of the mobile agricultural unit and expand the list of technological operations on which it can be used.

  • MECHANIZATION IN AGRICULTURE

    THEORETICAL STUDY OF THE MOTOBLOCK STABILIZING ON A SLOPE WORKS

    Mechanization in agriculture & Conserving of the resources, Vol. 63 (2017), Issue 3, pg(s) 98-100

    One of the most acute problems in the effective use of small-sized agricultural machinery, in particular, motor blocks, is the stabilization of their rectilinear motion on the slopes work. The purpose of this study is to increase the stabilizing moment of the motor block, by theoretically justifying its movement across the slope with a stabilizing device. The research uses modeling methods, theoretical mechanics and higher mathematics. As a result of the theoretical study, the conditions for the balance of the running wheels of the aggregate in the structure of the motor block and the agricultural implement when moving along the slope surface, as well as the traction of the wheels with the soil, are determined, taking into account the lateral force leading this unit down the slope. At the same time, as a stabilizing device, a micro-tiller is used, which makes it possible to pre-make a stabilizing groove for the wheels of the motor block. Further, using the developed power circuit, analytical expressions are compiled that allow us to numerically determine the structural and power parameters of a given aggregate, allowing it to stabilize its steady motion when working on a slope.

  • THEORY FOR ATTACHMENT OF TRACTOR-DRIVEN SUGAR BEET HARVESTING MACHINES

    Mechanization in agriculture & Conserving of the resources, Vol. 62 (2016), Issue 1, pg(s) 6-8

    An analytical study is related to giving proof and selection of the optimal parameters for the units, consisting of a tractor and a tractor-driven sugar beet harvesting machine. A mathematical model is built on the basis of this study and describes the conditions for effective attachment and give opportunity for determination of the working speed and productivity. The calculations allow finding the optimal parameters of the mentioned above aggregates in relation to productivity and energy consumption.

  • ТHEORY OF THE SEQUENTIAL OSCILATIONS OF THE SUGAR BEET ROOT DURING ITS VIBRATING DIGGING FROM THE SOIL

    Mechanization in agriculture & Conserving of the resources, Vol. 61 (2015), Issue 3, pg(s) 10-14

    In order to determine the optimal design and kinematic parameters of vibrational digging harvest technology of the sugar beet roots in relation to the physical and mechanical soil properties it is necessary to develop a new theory of the sequential oscilations of the sugar beet root during its vibrating digging from the soil. Such theory should be based on a deep study of the mechanism of force interaction of digs plough shares vibration working body with the body beet root and its further translational vibrations in the soil, as in an elastic medium.

    In a first stage we have developed an equivalent scheme of the above mentioned harvest technology, there were determined all forces acting on sugar beet root (conic approximation) and surrounding soil (in depth of movement of the digging plough shares and deeper – point of relative gripping), there were given kinematic parameters of the oscillating action on the sugar beet root, and axes were introduced.

    Next there were composed of linear second order differential equations with constant coefficients with the right parts, which describe the free and forced vibrations of beet root and its point of attachment along the axes, together with the surrounding soil root in the first stage extraction.

    Results obtained by using of systems of differential equations obtained on the PC have enabled to formulate the law of motion of beet root in the process of direct extraction from the soil vibration, as well as calculate the frequency and amplitude of free and free accompanying vibrations and amplitudes of forced vibrations root as a rigid body in an elastic medium.

    According to calculations, the centre of mass of root through 0,025 s to implement horizontal translational movement to a distance of 50 mm at a frequency of the disturbing force 10 … 20 Hz vertical and translational movement over a distance of 35 mm, at the same frequency vibrations and soil hardness c1 = 2·105 N/m2.

  • STUDY PLANE-PARALLEL MOTION MOVEMENT COMBINED SEEDING UNIT

    Mechanization in agriculture & Conserving of the resources, Vol. 61 (2015), Issue 2, pg(s) 3-6

    Conducted analytical studies, resulted in the construction of a new mathematical model of plane-parallel motion combined simultaneous sowing unit and bandpass mineral fertilizers. If you use the original equation in the form of Lagrange II-the kind, the system was composed of six differential equations of motion, that describes the behavior of the combined unit with its plane-parallel motion. Defined analytical expressions for the forces, that act on the machine unit, can be solved on the PC.

  • METHOD AND DEVICE FОR THRESHING OF SESAME

    Mechanization in agriculture & Conserving of the resources, Vol. 60 (2014), Issue 7, pg(s) 7-9

    In the following, well-founded a method and is proposed preliminary version of the device for stationary whole plant threshing of sesame. Presented a methodology for calculation of basic geometric and kinematic parameters of crushing and grinding mechanism consists of a pair of metallic corrugated rollers, for threshing of sesame.