Structural and kinematic analysis of equipment to cut weeds between plants on same row
2020
Gheorghe, G., National Inst. of Research-Development for Machines and Installations Designed to Agriculture and Food Industry, Bucharest (Romania) | Voicu, G., University Politehnica of Bucharest (Romania) | Persu, C., National Inst. of Research-Development for Machines and Installations Designed to Agriculture and Food Industry, Bucharest (Romania)
The analysis of the mechanisms studies the characteristics: structural, kinetic, kinetic and dynamic of some given mechanisms (the geometry of the analysed mechanism is known: the constant lengths and angles of the elements, the positions of the bases).Within the structural analysis, the number and type of kinematic elements and couplings, the number of the leading elements are determined and the structural and kinematic schemes of the mechanisms are divided into structural groups, respectively kinematic. The kinematic analysis studies the movement of the elements (positions, speeds, accelerations) without taking into account the forces acting on the elements. In the composition of a mechanism, kinetic elements and kinematic couplings are encountered. The structural analysis of a mechanism refers to: the number and shape of the elements, the order of their binding, the specification of the referenced element; number and type of kinematic couples (number of relative mobility and contact geometry); the degree of mobility of the mechanism; kinematic scheme, structural scheme, and graph attached to the mechanism; the decomposition of the mechanism into assurance groups. The paper presents the structural and kinematic analysis (positions, velocities, accelerations) of a mechanism aiming to drive the active bodies of equipment to cut weeds between plants on the same row that performs this work. The purpose of the structural analysis is to ensure the adequacy of the design from the point of view of safety and serviceability of the structure, to improve and validate the performance and reduce the need for costly prototypes or design changes later. The purpose of the analysis is to verify the design, from the point of view of the mechanism of operation of the system.
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