A method for the identification of dynamic characteristics car suspension materials

Abstract

Identification of dynamic characteristics of the machine suspension materials is required for troubleshooting and improving the ride quality. The method of identifying the suspension materials characteristics, based on the application of needle-shaped variation of the L.S. Pontryagin dynamical system to the invariant features of the dynamic system actual movement is presented in this study. The use of the needle-shaped parameters variation to the Hamilton-Ostrogradskyi action integral gives a condition of the objective functional minimum in the form of the maximum principle with the exception of the consideration of the vector of conjugate variables. As a result, the computational costs are reduced, the task of identification and optimization is simplified the convergence and accuracy of the algorithms is improved [1 - 5].

Mechanical coating formed under conditions of vibration exposure

“…The broad technological capabilities of vibrowave technological systems are the most effective means for obtaining high-quality, from the point of view of ensuring operational properties, coatings for various functional purposes on the surface [1][2][3][4][5][6][7][8][9][10][11][12]. Feature of the coating method considered in the article is that it is formed on the metal surface as a result of shock-pulse interaction of free-moving indenters in a closed volume under the influence of low-frequency oscillations.…”

Theoretical foundations of modeling the process of transport vehicles steel ropes structural defects formation

“…Problem setting. In the study of the resource and durability of steel ropes operation, despite high resource of steel ropes declared by the manufacturer (15 -20 years of exploitation), the authors noted that after 5 -6 years dangerous factors appear at the sites of splicing (breaks, external wear of wires, rope diameter reduction as a result of core damage, loss of internal section, formation of "waviness"), which is the basis for unscheduled rope repair with replacement of the defective area and leads to significant material costs [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. These hazardous factors indicate a violation of the steel rope physicomechanical characteristics at the splicing site and lead to its premature wear.…”

The use of SmartBox container for agrobusiness logistic processes optimization

“…The "bag" option made of fabric material or soft impermeable material (flexitank) allows to transport not only piece goods (as in ordinary containers), but also bulk and liquid ones [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30].…”