چكيده به لاتين
Magnoreological damper is located in the Category of semi-active dampers and is used to improve the car's ride quality. This system requires electrical power. Various methods have been developed for generating power in the car that one of them is use of piezoelectric materials. What is not mentioned in the papers is the use of piezoelectric as a source of power for the use of magnetorheological damper. Due to lack of comprehensive research on this topic, this thesis examines the proper structures for piezoelectric transducers. In the present study, the amount of power generation, and the dynamic effects of adding a piezoelectric energy harvesting system on the suspension system function are considered. At first, the vehicle system model, Magnetorheological damper model, battery model, and piezoelectric model were implemented in the Simulink Matlab software and then verified with the experimental results presented in the papers. The piezoelectric proposed model includes an analysis of the structure and behavior of the piezoelectric vibrator in the suspension system. Finally, the overall car model is integrated with all models.
To find the optimal piezoelectric structure, the study of dimensional parameters and the proposed piezoelectric structure materials was performed and an optimal structure was introduced. In order to determine the position of the Piezostack in the suspension system, several layouts proposed and the best layout with regard to electric power and dynamic behavior have been proposed. Subsequently, a suitable magnetoreological damper with its controller for vehicle application is proposed. Due to the difference in piezoelectric voltage level and battery input, the voltage level and battery charging circuit are designed and, finally, an integrated model is presented. After finalizing the final model, the energy generated by piezoelectric transducer and the energy required by the magnetorheologic damper in response to the inputs of roads classes C and E have been examined and it has been shown for vehicle run at 50 m/s on road class E, about 18.6% of battery energy consumption is reduced.
