A Waymo Car Crash in March Raised Doubts About the Future of Driving Cars

인천운전연수 A decade of flashy demos from Google, GM, Ford and Tesla promised that cars could drive themselves safely. But a crash by a Waymo car in March has raised doubts about the technology’s future.

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Autonomous vehicles depend on radar sensors, video cameras and lidar (light detection and ranging) to track everything around them, including traffic lights and lane markings. But these systems must make decisions in fractions of a second.

Steering

Having excellent handling is one of the most important things to keep in mind when driving. To achieve great steering, 인천운전연수 it takes a well-designed suspension and good quality car steering parts.

Steering systems are not as simple as they seem on a surface level. They convert the rotary motion of the steering wheel into a swiveling movement of the road wheels, which is transferred to each wheel via a series of rods and pivots.

Most modern cars use a system known as rack and pinion. The rotary motion of the steering wheel turns a big gear called a worm, which in turn moves a smaller gear called a pinion. The pinion is connected to a track rod that then connects to each of the road wheels.

Electric power steering is also becoming more common. These systems have a motor that uses sensors to calculate vehicle speed and steering wheel angle to determine how much effort to apply to the wheels. This allows a light feel at parking speeds, while amplifying the effort at highway speeds to allow for better control on the road. It also lets the car adjust to factors like a crosswind or a crowned road surface without the driver manually changing the steering wheel position.

Acceleration

Acceleration is the rate at which an object changes its velocity. You can accelerate by hitting the gas or brakes in a car, both of which 인천운전연수 cause a change in speed, but you can also accelerate by turning the steering wheel to change the direction of motion. Acceleration can also be felt when you go down a roller coaster or when you are pulled by gravity at 9.80 m/s2.

Since acceleration is a vector quantity, it has both magnitude and direction. If the acceleration points in the same direction as the velocity, then the car is speeding up; if the acceleration points in the opposite direction of the velocity, the car is slowing down. The car in the school zone, for example, was speeding up when it drove into the mud and was speeding down as it chased the donut. Extreme acceleration is dangerous, which is why crash test dummies are equipped with accelerometers. They can detect forces that would tear a human’s pulmonary artery and kill them. Acceleration is also related to injury, which is why a seat belt is essential.

Braking

Brakes are one of the most important parts of your car, especially in traffic. Harsh braking can wear them out prematurely and lead to a dangerous skid.

Luckily, modern cars have a built in system that prevents your brakes from locking up under sudden and intense pressure. Known as anti-lock braking, or ABS, the system uses sensors and computerized controls to check the speed of each wheel. When the wheels stop spinning, the computer sends hydraulic fluid to rapidly pump and release the brakes, preventing a tire lock up and allowing you to maintain steering control.

The system can also sense how close you are to the car ahead of you and warn you with sounds, visual or vibrations if you are about to rear-end it. However, this does not replace the need to practice braking technique. To get the most out of your car’s brakes, it is important to progressively ease off the pedal and learn how much pressure to apply for maximum efficiency. Practice braking on dry and wet pavement to find your OSP (optimal squeeze point) for each surface.

Turning

When you turn a car, it is important to be careful and use proper steering technique. This prevents unnecessary strain on the steering system and premature wear on the front tyres. Always keep one hand on the wheel at all times while your vehicle is moving unless you are operating another hand control or giving a signal. If you take your hands off the wheel when turning, it can lead to loss of control and a crash.

When preparing to make a turn, it is important to slow down and check your rearview mirror to see how close you are to traffic headed your way. This is necessary to avoid being rear-ended and pushed into oncoming traffic.

When you are turning out of a driveway, alley or private road into a roadway, you must yield the right-of-way to vehicles already on the roadway and pedestrians. Likewise, when you are preparing to turn left at an intersection, you must yield to traffic approaching from the opposite direction.

Controlling the Car

Most modern cars use sensors, actuators and software to control acceleration, braking and steering. Sensors, aided by lasers, radar and high-powered cameras, detect the car’s environment. Software processes those inputs and calculates the car’s position. Then, it sends instructions to the “actuators,” which control the steering wheel and gas pedals. Hard-coded rules, predictive modeling and smart object recognition help the system follow traffic laws and avoid obstacles.

The car also knows how fast it should travel, based on the vehicle speed limit and other road conditions. It will pause acceleration, slow down or change lanes to maintain a safe distance from other vehicles. It will even keep the car centered in its own lane when driving on highways, using a feature called lane-centering steering.

While it’s still too early to predict the full societal benefits of self-driving cars, we do know that they could reduce traffic delays and congestion. They may also cut down on fuel consumption and vehicle emissions. And, they could enable more people to drive without having to own their own vehicle, allowing them to get around more efficiently.