Investigation of the efficiency and effectiveness of the algorithm for suppressing self-oscillations at the intensive start of movement on the rise

Abstract

One of the possible operating modes in which the self-oscillation of the shafts and gears of the traction electric drive are most pronounced is the mode of fixing the vehicle on a slope at the beginning of its rolling due to the creation of torque on the shafts of electric motors that prevent the wheels from rotating towards the rolling of the vehicle. At the same time, the standard braking system is activated, and the driving wheels are in braking mode, since the lifting assistance function is activated. In this case, there may be inconsistency in the processes of reducing the braking torque and increasing the traction torque at start, which can lead to the accumulation of energy in the system exciting self-oscillations with negative friction and the absence or smallness of damping. This operating mode in operation is highly probable, since the movement of the vehicle is always associated with stops and the subsequent start of movement, especially in populated areas, which often happens on road slopes. The purpose of the study. It is necessary to check the operability and effectiveness of the self-oscillation suppression method in the electromechanical wheel drive system at the beginning of movement and the operation of the lifting assistance system. Materials and methods. The study of the efficiency and effectiveness of the algorithm was carried out using experimental research methods. The results of the study. Using the method of field experiments, the efficiency and effectiveness of the algorithm for suppressing self-oscillations at the intensive start of movement on a slope and an activated ascent retention system were established. According to the research results, it can be concluded that when the self-oscillation suppression algorithm is activated, the amplitude of oscillations of the angular velocity of the TED rotors is reduced by up to 8 times. For torques, self-oscillations are completely suppressed, which indicates the effectiveness of the suppression algorithm. At the same time, the operation of the self-oscillation suppression algorithm led to an increase in the efficiency of the vehicle fixation algorithm on an incline, since the rollback during fixation decreased by 8...15 %.