Components of AUTOSAR Chassis Domain


In the automotive industry, the chassis domain refers to the electronic control systems that are responsible for controlling the vehicle's chassis. The chassis is the part of the vehicle that provides the structural support and allows it to move. It includes the following components:

  • Brakes: The brakes are responsible for stopping the vehicle. They are controlled by a brake control unit (BCU), which receives input from sensors, such as wheel speed sensors, and uses this input to control the brake actuators, such as the brake calipers.
  • Steering: The steering system is responsible for allowing the driver to control the direction of the vehicle. It is controlled by a steering control unit (SCU), which receives input from sensors, such as the steering wheel angle sensor, and uses this input to control the steering actuators, such as the steering rack.
  • Suspension: The suspension system is responsible for absorbing the bumps and vibrations from the road surface. It is controlled by a suspension control unit (SCU), which receives input from sensors, such as accelerometers, and uses this input to control the suspension actuators, such as the shock absorbers.
  • Electronic Stability Control (ESC): ESC is a system that helps to prevent the vehicle from skidding or spinning out of control. It uses information from sensors, such as wheel speed sensors, accelerometers, and gyroscopes, to determine if the vehicle is at risk of losing control. If necessary, ESC will apply the brakes or reduce the engine power to help the vehicle regain control.
  • Anti-lock Braking System (ABS): ABS is a system that prevents the wheels from locking up during braking. This can help the driver to maintain control of the vehicle during braking, especially in slippery conditions.
  • Traction Control System (TCS): TCS is a system that prevents the wheels from spinning out of control during acceleration. It does this by reducing the engine power or applying the brakes to the spinning wheel.

The automotive chassis domain is a critical part of the vehicle's safety and performance. It is responsible for ensuring that the vehicle can stop safely, steer properly, and handle well in different driving conditions. The chassis domain is also becoming increasingly important as vehicles become more automated and connected.

The chassis domain is typically implemented as a distributed system, with each component running on its own electronic control unit (ECU). The ECUs are connected to each other through a network, such as CAN bus or FlexRay. This allows the components to communicate with each other and coordinate their actions.

 Some of the components of AUTOSAR Chassis Domain:

  • Brake Control: This component is responsible for controlling the vehicle's brakes. It receives input from sensors, such as the brake pedal position sensor, and uses this input to calculate the brake force that is required. The brake control component then sends this output to the actuators, such as the brake calipers, which apply the brake force to the wheels.
  • Steering Control: This component is responsible for controlling the vehicle's steering. It receives input from sensors, such as the steering wheel angle sensor, and uses this input to calculate the steering angle that is required. The steering control component then sends this output to the actuators, such as the steering rack, which turns the wheels.
  • Suspension Control: This component is responsible for controlling the vehicle's suspension. It receives input from sensors, such as the road speed sensor, and uses this input to calculate the suspension settings that are required. The suspension control component then sends this output to the actuators, such as the shock absorbers, which adjust the suspension.
  • Transmission Control: This component is responsible for controlling the vehicle's transmission. It receives input from sensors, such as the engine speed sensor, and uses this input to calculate the gear ratio that is required. The transmission control component then sends this output to the actuators, such as the transmission shifter, which changes the gear ratio.
  • Wheel Speed Sensor: This sensor measures the rotational speed of each wheel. This information is used by the ABS and ESC systems to control the brakes and prevent wheel lockup.
  • Steering Angle Sensor: This sensor measures the angle of the steering wheel. This information is used by the steering control system to control the steering angle of the wheels.
  • Acceleration Sensor: This sensor measures the acceleration of the vehicle in the three axes: longitudinal, lateral, and vertical. This information is used by the stability control system to keep the vehicle stable during cornering and braking.
  • Gyroscope Sensor: This sensor measures the angular rate of the vehicle. This information is used by the stability control system to keep the vehicle stable during cornering and braking.
  • Brake Control: This component is responsible for controlling the braking system of the vehicle. It receives input from sensors, such as the wheel speed sensors, and uses this input to control the brake actuators, such as the brake calipers.
  • Steering Control: This component is responsible for controlling the steering system of the vehicle. It receives input from sensors, such as the steering wheel angle sensor, and uses this input to control the steering actuators, such as the steering rack.
  • Electronic Stability Control (ESC): This system is responsible for preventing the vehicle from skidding or spinning out of control. It uses information from the wheel speed sensors, accelerometers, and gyroscopes to determine if the vehicle is at risk of losing control. If necessary, ESC will apply the brakes or reduce the engine power to help the vehicle regain control.
  • Anti-lock Braking System (ABS): This system prevents the wheels from locking up during braking. This can help the driver to maintain control of the vehicle during braking, especially in slippery conditions.
  • Traction Control System (TCS): This system prevents the wheels from spinning out of control during acceleration. It does this by reducing the engine power or applying the brakes to the spinning wheel.
  • Adaptive Cruise Control (ACC): This system maintains a set speed and distance between the vehicle and the vehicle in front of it. It uses information from the radar sensor to determine the speed and distance of the vehicle in front of it. If the vehicle gets too close to the vehicle in front of it, ACC will reduce the speed of the vehicle.
  • Lane Departure Warning (LDW): This system warns the driver if the vehicle is about to depart from its lane. It uses information from the camera or radar sensor to determine the position of the vehicle in the lane. If the vehicle starts to drift out of the lane, LDW will warn the driver.
  • Lane Keeping Assist (LKA): This system helps the driver to keep the vehicle in its lane. It uses information from the camera or radar sensor to determine the position of the vehicle in the lane. If the vehicle starts to drift out of the lane, LKA will apply the steering actuators to help the driver bring the vehicle back into the lane.

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