الفهرس 
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Abstract
The suspension system provides the best ride comfort, balance, and stability of the vehicle on the road. The need for harvesting is now one of the most important areas of today’s science. Vehicle suspension systems are considered one of the most important factors in improving rideability and ensuring the safety and performance of the vehicle. Energy harvesting has become an important issue today. Therefore, focusing on obtaining energy from suspension systems increases the importance of energy management. Energy harvesting of the dumpers is viewed as storage facilities for wasted energy, providing opportunities for partial extraction and use in different applications. This investigation encompasses an evaluation of the clash between the dynamic characteristics of a vehicle and the dissipated energy within a multi-state suspension system employing switchable dampers across various dynamic vibration modes. A comprehensive analysis of energy consumed and vehicle dynamics, especially in terms of the four-state switchable damper of the suspension systems. In addition, it focuses on analyzing and measuring the dissipated energy associated with each variable damper by testing with a vibration meter. Throughout this study, the focus has been on understanding the energy harvesting expended in four-state switchable damper suspension systems to determine the rate of energy that needs to be energy harvested. Additionally, this purpose requires the use of sensor arrays such as load cells, Linear Variable Differential Transformers, accelerometers, and piezoelectric sensors to measure the energy distribution in the four-state switchable damper. Finally, the study provided an experimental test of the possibility of using a state switchable damper in each wheel drive and measured their energy absorption capacity by the piezoelectric sensor. The results show the possibility of using sensors, load cell, accelerometer, linear variable displacement transducer, and piezoelectric sensors, to energy harvest from a four-state switchable damper. The use of a piezoelectric sensor gives the best energy harvest results.