Ensuring the safety of animals and agricultural products by increasing the stability of the tractor semi-trailer

Abstract

The article considers the stability of transportation and technological machines considering design features and operating conditions. The study highlights the importance of establishing scientifically based requirements for parameters and application of design solutions, which ensure comfortable conditions for transporting animal and vegetable cargoes of the agro-industrial complex. The authors present a mathematical model for assessing the stability of a multilink machine with the allocation of inertia forces as key parameters. The authors propose to use the calculated model when studying the stability of technological machines in the process of transportation of animal and vegetable cargoes of agro-industrial complex in semi-trailers and assessing the critical ratio of the angle of rotation, and speed of inertial forces. This is necessary to exclude abnormal situations, such as the folding of the semi-trailer and overturning of the machine. The authors propose reducing the width of the overall corridor during curvilinear movement by controlling the parameters of the steering angle of the steering wheels of the semi-trailer, depending on the folding angle, and reducing the sliding of the semi-trailer wheels. A crucial element in the design is the inclusion of a parallelogram-type setting mechanism fixed on the fifth wheel. The proposed control system for turning the multilink machine has a simplified design, turns the steerable wheels of the semi-trailer depending on the folding angle, and increases the characteristics of maneuverability, passability, and stability of movement with steerable wheels of the semi-trailer. Development of the design solution involves the inclusion of a digital control unit with an adaptive change module considering the type of transported cargo, such as animals, as objects forming the effect of the floating value of the center of mass and vector of inertial forces.