Validation of the Results of the Fuzzy Control Systems Method in Optimizing the Dynamic Behavior of Viscoelastic Dampers

Abstract

The use of shock absorbers in various industries in order to reduce the fluctuations of equipment and air from premature depreciation and increase the useful life of parts has a special feature. In this research, the design and construction of the hydraulic shock absorber and the analysis of the characteristics and components of the parts and the impact of the working fluid used in the shock absorber have been discussed. In common shock absorbers used in the industry, hydraulic oil with a constant viscosity (Newtonian fluid) is used, and in this condition, due to the constant viscosity of the fluid, the stopping acceleration of the shock impacting the shock absorber is initially high, and with the passage of time, the acceleration . The stop is reduced, and this issue causes motion shock and hitting the body, and may cause injury or death. In this research, researchers and decision makers have investigated the rheological properties of the working fluid used in shock absorbers by applying the science of rheology, which has been highly regarded over the years. In fact, by using fluids whose viscosity is not constant (non-Newtonian) and whose viscosity changes due to various reasons such as shear stress change, the intelligent function of the receiver is affected. The use of these fluids is such that when the body collides with the bumper, due to the impact and the high cutting rate, the viscosity of the fluid is reduced and causes the body to experience less acceleration and stop. decrease with The shear rate and consequently the increase in viscosity of the fluid, the acceleration of the stop is increased until it finally becomes an object. It should be noted that the construction of such shocks is of interest in the world, and this is the first experience of industrial use of this shock in the world, which can confirm the laboratory results of improving the damping conditions. These shock absorbers are used in various industries, such as automotive industry, aviation, strengthening of buildings against earthquakes, as well as the elevator industry.