Sharif Digital Repository

In this thesis, overall design of a multi-purpose vehicle for transportation, repair and cleaning missions in hydro power station water ways during overhaul is presented. Design process is divided into several parts. The main challenges of the project and customer requirements are discussed first. A brief review of electric vehicles history is presented. The conceptual design including initial dimensional calculations, energy analysis and component selection are described in subsequent sections. Finally the structural and dynamic analysis of chassis and suspension system are carried out. To avoid pollution and life hazards to workers, a battery and electric motor drive system is utilized.... 

In recent years, the seat suspension system in commercial vehicles, industry, agriculture, transportation and … have been focused by researchers. Designing the spring-damper isolators for vehicle’s seat can be an achievable and suitable strategy to increase the comfort and decrease the risk of injuries in vehicles. In this research, the effect of vibrations due to road roughness has been examined by dynamic modeling of a vehicle in combination with the human body model. Thus by using spring-damper isolators and genetic algorithm, we try to optimize the performance of the system. Designing parameters includes the stiffness and viscosity of seat isolator and our target functions include the... 

The use of drones in various fields is increasing. One of the applications that can be mentioned for drones is humanitarian areas can include drug supply chains, blood supply chains, relief chains, and the like. The use of these unmanned vehicles in humanitarian areas poses legal challenges compared to other areas. This study aimed to investigate drones following a disaster, the essential role of UAVs, and a vehicle to carry out relief operations. Following a disaster, infrastructure can be severely damaged, and the destruction of infrastructure can reduce the efficiency of land vehicles. In this research, “drone and vehicle routing problem” have been done to provide relief and minimize the... 

Vehicles are safety-critical Cyber-Physical Systems (CPSs) consisting of hundreds of control units. The Engine Control Unit (ECU) is a fundamental part of a vehicle, and by applying reliability improvement techniques to the ECU, we can prevent catastrophes, performance degradation, and environmental damage. However, like any other CPS, traditional reliability assessment of the cyber and physical parts is insufficient as these parts are tightly coupled. Furthermore, the ECU consists of many mutually dependent subsystems, the failure of which will fail the whole vehicle system. Hence, to compensate for the hardware redundancy cost, we have improved the reliability of the system's bottleneck....