Qualitative analysis of the undesirable effect of loss of traction force of a vehicle during an intense start

Reshmin, S. A.

doi:10.31857/s0869-56524843289-293

Cited by 2 publications

(1 citation statement)

References 4 publications

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“…В работе [17] описан эффект значительной и резкой потери средней силы тяги во время разгона тракторного тягача на колесном ходу при несимметричных или несинхронных колебаниях ведущих колёс. Указаны колебательные режимы, приводящие как к частичной, так и к почти полной потере средней силы тяги.…”

Section: Introductionunclassified

Method for detecting the loss of stability of the movement of tractors when towing a trailer or a coupled unit

Zhileykin,

Sirotin,

Nosikov

et al. 2023

Tractors and Agricultural Machinery

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BACKGROUND:Currently, combines and tractors, being the most energy-intensive transport and technological machines for agricultural purposes, largely determine the possibility of transition to an efficient and environmentally friendly agricultural economy, and also provide the technical aspect of the transformation of the agro-industrial complex into the leading sector of the countrys industry. One of the sources of dynamic loads in the units and subsystems of tractor equipment are self-oscillating modes. AIMS:Study of the conditions for the occurrence of self-oscillating processes in the design of wheeled tractor trains and development of methods to increase the handling and safety of their movement by means of reducing the galloping and yawing of the tractor-tractor when towing heavy loads. METHODS:It has been established that due to the coupling of oscillations along the longitudinal displacement of a truck tractor and a trailer with oscillations along the vertical displacement of the center of mass and with pitch angle oscillations of the truck tractor, when an auto-oscillatory mode occurs in the interaction zone of an elastic wheel with a solid surface, the same mode of self-oscillation will occur along the mentioned degrees of freedom. Moreover, it is possible to specify the sequence of occurrence of self-oscillating modes in different zones of the tractor train design. RESULTS:First, self-oscillations are excited in the contact patch of a wheel with a solid surface when a complete slip occurs, then self-oscillations along the pitch angle of a truck tractor body begin and after that self-oscillations along the vertical displacement of the center of mass of a truck tractor occur. Folding angle oscillations of a tractor train are associated with oscillations of the translational motion of wheel centers, which lead to the emergence of an self-oscillating mode, both with partial and full slip in the interaction zone of an elastic tire with a solid surface. Since the self-oscillations of each of the wheels occur at random times, the self-oscillations of a truck tractor along the folding angle will be chaotic. CONCLUSIONS:The practical value of the study lies in the possibility of using the proposed methods to identify the danger of self-oscillating processes in the design of promising types of agricultural machinery.

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Section: Introductionunclassified

Method for detecting the loss of stability of the movement of tractors when towing a trailer or a coupled unit

Zhileykin,

Sirotin,

Nosikov

et al. 2023

Tractors and Agricultural Machinery

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Accounting for phase limitations during intense acceleration of a mobile robot and its' motion in drift mode

Reshmin,

Bektybaeva

2024

Doklady Rossijskoj akademii nauk. Matematika, informatika, proc

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The problem of effectively controlling the traction of an all-wheel drive wheeled robot after a sharp turn due to the sudden appearance of a long obstacle on the way has been solved. It is assumed that during steering the body is parallel to the obstacle and the front wheels are aligned. It is required to ensure acceleration along the obstacle and at the same time avoid a side collision with it. The solution is based on the so-called linear tangent law, adapted to consider phase restrictions. At a finite time interval, the speed of wheel rotation was obtained during lateral movement in drift mode and subsequent acceleration on the verge of slipping along a straight line, which is as close as possible to the boundary of the obstacle. The corresponding trajectory is also shown. The dependence of the longitudinal speed developed at the end of the maneuver on the initial distance to the obstacle and the time of the maneuver was studied. The left-side limits of wheel angular acceleration and power at the end of the sliding section are determined. The found trajectory is compared with some other trajectories consisting of a curved and straight section. As a result of numerical calculations, it is shown that it is more effective.

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Qualitative analysis of the undesirable effect of loss of traction force of a vehicle during an intense start

Cited by 2 publications

References 4 publications

Method for detecting the loss of stability of the movement of tractors when towing a trailer or a coupled unit

Method for detecting the loss of stability of the movement of tractors when towing a trailer or a coupled unit

Accounting for phase limitations during intense acceleration of a mobile robot and its' motion in drift mode

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