Vibration-protective properties of the suspension with smooth regulation of inelastic resistance in the vibration cycle

Abstract

Any mechanical vehicle is equipped with a special device to ensure a constant connection between the wheel system and the supporting system. This device is the vehicle's suspension. The suspension of a motor vehicle performs important functions in the operation of the vehicle. The main ones are: mitigating the physical impact on the vehicle. Also, ensuring the accuracy of the steering, which in turn allows you to maintain the desired direction of the wheels. Another important function that the vehicle suspension performs is to stabilize the vehicle while driving, limiting roll. The quality of suspension performance of the above mentioned functions is greatly influenced by its vibration protection properties. Vehicle suspension vibration protection properties are characterized by its elastic and damping components. In order to improve the vibration protection properties, these characteristics must vary according to different vehicle operating conditions. Because of the complex dynamic effects on the vehicle suspension, it is necessary to investigate and develop new methods of forming dynamic load models under different types of road influences. The article presents a mathematical model of a single-mass single-support oscillatory system with two algorithms for smooth regulation of damping in the oscillation cycle. A theoretical comparative analysis of the vibration-protective properties of a single-mass singlesupport suspension with an adjustable shock absorber is carried out. It has been established that a smooth decrease in resistance in the region of the middle position of the suspension makes it possible to reduce the resonant vibration frequency by more than 2 times in comparison with an unregulated shock absorber and to reduce the range of vertical accelerations of the sprung mass in the resonance zone by 25 % in comparison with the suspension with optimal instantaneous damping control.