Nonlinear Friction and Resistance, Generating Sources of Optimal Points in the Energy Field of Agricultural Aggregates Working Process

Abstract

The paper presents a point of view on the main sources that can generate some optimal points in the energy field of the agricultural machines working processes. It looks like a possible source of the existence of optimal points in the energetic field of work processes of agricultural machinery and equipment, are the coefficients of friction and specific resistance to deformation of soil. In the news models these coefficients became nonlinear functions. Similar forms are given for all three coefficients and is shown the existence of optimal points. They make some considerations about this method and include results obtained using it.

Optimum Working Conditions for Variable Width Ploughs

“…Taking into consideration that without adding some additional conditions (restrictions) to the basic formulas from which it was started, the chances of finding extreme local points are very small or null (Al-Janobi A.A. and Al-Suhaibani S. A., 1998;Cârdei P. et al, 2013), the productivity as value, W, was set constant, and then from relation (4) the working speed can be expressed:…”

“…• soil particles' kinematics during the ante-mouldboard tillage tools working process (Biriş S. Şt. et al, 2008), • stress distribution determination appearing on the lamellar mouldboard surface with a view to modelling and optimization (Bungescu S. et al, 2008), • nonlinear friction and resistance, generating sources of optimal points in the energy field of agricultural aggregates working process (Cârdei P. et al, 2013), respectively • determination of the subsoiler traction force influenced by different working depth and velocity (Croitoru Şt. et al, 2016).…”