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Vehicle Controllers and Communication
Published in Iqbal Husain, Electric and Hybrid Vehicles, 2021
In electric and hybrid vehicles, controllers are required for various powertrain components such as electric motor drives, power electronic converters, battery management, IC engine, transmission and fuel cell. Hybrid electric vehicles also require a supervisory controller to generate the commands for the various powertrain subsystems. Ancillary systems such as electric power steering (EPS), anti-lock braking system (ABS), multimedia entertainment unit and climate control system also require a controller for their operation. The controller is responsible for generating output command signals for the actuator based on command inputs and feedback signals following a control law and algorithm. The controllers also host the communications module through which the components and subsystems communicate with each other. The command signals, the sensor feedback signals and the system output variables interconnect the vehicle driver, the supervisory controller and the subsystems, and components are transferred from one unit to another through an automotive communication network. Controller area network (CAN) is the most commonly used protocol used for such communication. CAN uses a serial multi-master communication protocol with each controller hosting the physical layer of the network.
Fieldbus
Published in Chanchal Dey, Sunit Kumar Sen, Industrial Automation Technologies, 2020
Bus access in PROFIBUS PA is executed in a master-slave configuration. In a multi-master system, token passing method is used between masters with a single master remaining in control of the bus for a precise length of time. This master is then in active condition and regulates data traffic in DP-PA environment. The devices on the PROFIBUS PA are accessed either by a segment coupler or by a link.
Development of testbed for cyber-manufacturing security issues
Published in International Journal of Computer Integrated Manufacturing, 2020
Mingtao Wu, Jinwoo Song, Snehav Sharma, Jupeng Di, Benliu He, Ziming Wang, Jingkai Zhang, Long Wang Lucas Lin, Emily Ann Greaney, Young Moon
The connection between the Raspberry Pi and the robotic arm controller Arduino UNOs is via I2 C protocol. It is a multi-master protocol that virtually any number of slaves and any number of masters can be connected and communicate between each other on two signal lines (Leens 2009).