Ingenieur Vol. 74 Ingenieur Vol 72, April-June 2018 - Page 29

included eight cameras and 12 ultrasonic sensors, in addition to forward-facing radar. The HW2.5 upgrade was released in mid-2017 with a second Graphics Processing Unit and a driver- facing camera. All Autopilot-enabled cars receive software updates wirelessly. As of 2017, Autopilot included:- ● ● Adaptive cruise control, lane departure warning, emergency braking ● ● Autosteer - semi-automated steering ● ● Autopark - parallel and perpendicular parking and ● ● Summon - recalling the vehicle from a parking place Adaptive cruise control Autopilot has the ability to follow another car, maintaining a safe distance from it as it speeds up and slows down. It can observe a second vehicle in front of the vehicle that it is following. It also slows on tight curves and when a car crosses the road in front of it. It can be enabled at any speed above 27 kph. By default, it sets the limit at the current speed limit plus/minus any driver-specified offset. Autopilot alerts the driver under various circumstances, such as a surprising situation on the road or excessive inattention by the driver. If the driver dismisses three audio warnings within an hour, Autopilot is disabled until the car is parked. This is to prevent drivers from excessive reliance on built-in safety features. Under 72kph, hands-free driving is allowed for five minutes, unless the car detects lateral acceleration. Above this speed, hands-free driving is allowed for only three minutes if following another vehicle or one minute without following a car. Autosteer Autosteer steers the car to remain in whatever lane it is in (known as lane-keeping). For cars equipped with HW1, they are able to change lanes as directed by a tap of the turn signal. As of May 2017, the upgraded hardware HW2 limits this feature to 145 kph on highway roads. Autopark/Summon Autopark drives the car into a parking spot, while Summon drives it out. Configuration settings control maximum distance, side clearance and bumper clearance. This feature activates the Tesla Homelink programme to open and close garage doors, and it is available on mobile app. Safety Issues With so many avant-garde features, Tesla cars are constantly making headlines. Car production hiccups and delay in deliveries are often in the news. So are incidents of fires and crashes. After several cases of Model S catching fire, the company responded with better protection for battery packs. All Model S .25-inch (6.4 mm) aluminium shield over the battery pack has been replaced with a new three-layer shield. Fatal crashes and injuries related to the use of Autopilot have also raised concern. A Model S driver died in a collision with a tractor-trailer on May 7, 2016, in Williston, Florida, while the vehicle was in autopilot mode. The National Highway Traffic Safety Administration (NHTSA) investigated the accident and concluded: “A safety-related defect trend has not been identified at this time and further examination of this issue does not appear to be warranted.” In accident cases, Tesla says it can tell from its logs that drivers were either distracted or ignored the car’s warnings to take control. The company cautioned drivers and issued a statement saying “when using Autopilot, drivers are continuously reminded of their responsibility to keep their hands on the wheel and maintain control of the vehicle at all times.” While a fully automated car is still years away, Tesla has really changed the future of driving. Advanced features in Autopilot remove much stress and assist tech-savvy drivers with the most burdensome parts of driving. - Inforeach REFERENCE https:// en. https: // https:// 27