By-wire also offers important advantages for vehicle manufacturers. Elimination of mechanical systems could cut weight and could more easily enable automakers to switch a car from a left-hand-drive to right-hand-drive, so it could be sold in other countries.
The transition to steer-by-wire has been a long-awaited one. As far back as a decade ago, auto industry engineers looked forward to the addition of steer-by-wire and brake-by-wire technologies but hesitated because it was believed that 42V electrical architectures would be needed in order to make it happen. "You can't do steer-by-wire with a 12V system," one veteran industry engineer was quoted as saying in a 2001 Design News article. "For steer-by-wire, 42V is absolutely essential." At the time, engineers estimated that steer-by-wire would draw as much as 1.8kW, which they said would necessitate use of better alternators.
Infiniti did not say what changes had enabled the use of steer-by-wire in its cars, but the company did say it is not depending on the higher-voltage of hybrid electrical architectures to make it happen. "We've not announced what vehicles it will go into, but it has been demonstrated in a conventionally powered car, not a hybrid," Bazemore said. "So you can reasonably assume that's how we'll offer it."
Greg, the backup is absolutely required. While it is rare, I have been in a car where the power failed and the power steering stopped working. This was a hydralic system, and it was very hard to steer the car, but at least it could be done. Electrical systems are more likely to go out on a car, I would venture to guess, than the purely mechanical ones. Especially electrical systems that are digital.
For industrial control applications, or even a simple assembly line, that machine can go almost 24/7 without a break. But what happens when the task is a little more complex? That’s where the “smart” machine would come in. The smart machine is one that has some simple (or complex in some cases) processing capability to be able to adapt to changing conditions. Such machines are suited for a host of applications, including automotive, aerospace, defense, medical, computers and electronics, telecommunications, consumer goods, and so on. This discussion will examine what’s possible with smart machines, and what tradeoffs need to be made to implement such a solution.