Drive by wire ppt
- 4. The Brakes By Wire In future automobiles will serve as the vehicle for high speed applications. Therefore it was very important to make a vehicle that has a reliable and effective brake. As discussed in the background chapter, there are two ways that brakes can be electronically controlled: electrohydraulic braking and electromechanical braking. First, the car must be capable of being manually operated.
- 5. Control of The Steering System There are five components that were needed to control the Smart Motor. The car controller, the PCM, the Quicksilver Controller Interface, the Silver Nugget, and of course the steering motor. So, one guideline was to make sure the hardware installed in the car does not interfere with the driver’s space. Secondly, the hardware must be installed in such a way that a person can drive the vehicle without having to move any components of the by-wire system. Thirdly, the by-wire system must be robust and durable.
- 6. The signal starts with the car Controller and is sent to the PCM. From the PCM, a signal is then sent through the Quicksilver Controller Interface otherwise known as the breakout board to the Silver Nugget controller and amplifier. From the Silver Nugget, a voltage signal is then sent to the smart motor. The smart motor then moves to the position corresponding to the signal that was sent. As the motor rotates, an encoder inside the motor sends feedback through the Silver Nugget and the breakout board straight to the PCM. Figure shows the flow of signal PCM to smart motor.
- 7. Control of the steering system
- 8. TYLES OF DRIVE-BY-WIRE SYSTEMS
- 9. BRAKE-BY-WIRE There are actually two types of brake-by-wire systems. Hydraulic, or "wet," brake-by-wire uses additional hydraulic parts to create pressure on the brakes. Electric, or "dry," brake-by-wire, on the other hand, simply uses an electric motor and no hydraulic brake fluid. STEEL-BY-WIRE Sensors detect the movements of the steering wheel and send information to a microprocessor. The computer then sends commands to actuators on the axles, which turn according to the driver's directions.
- 11. A new form of brake actuation should be implemented into later iterations of this project. The steering system is exceptional as it is though a new belt drive system may be in order to reduce belt slip. More safety systems such as mechanically actuated emergency stops should be incorporated into future projects as to ensure safety. Suggestions for sensors include an internal navigation system and global positioning sensors. With these sensors, the ability to make the vehicle drive autonomously will also be a possibility. Installing sensors at the wheels, steering shaft, and brakes for instance will also make it possible to quantify how much turning and braking is occurring in the vehicle. Thus, there will be a basis for comparison to measure exactly how effective the drive-by-wire system is. CONCLUSION