Key insights

• Redundancy and Supply Paths for Emergency Brake Systems

  • 🔄 Failure detection is crucial for startup and redundant passes activation.
  • 🔄 Service brake under power loss can be considered as a redundancy point.
  • 🔄 Criteria for redundancy in brake systems and EBS valve supply.
  • 🔄 Monitoring not mandatory for mechanical failures leading to a safe state.
  • 🔄 No explicit requirement for EBS valve supply from the same source.

• EBS Actuator Monitoring and Inspection

  • 🔧 Teams use activators to monitor the brake pedal or a second master brake cylinder connected to the EBS actuator.
  • 🔧 Pressure transducer system is the smartest but requires careful design and proper material selection.
  • 🔧 Technical inspection is crucial for EBS functionality and restart time.
  • 🔧 Ensure good accessibility of EBS parts for sensor and actuator maintenance.
  • 🔧 Keep preparation simple and fast, ensuring the vehicle enters the autonomous state within one minute.
  • 🔧 Be prepared for rain tests and bad weather conditions.
  • 🔧 Avoid depending on GPS signal for inspection missions.
  • 🔧 Plan for competitions in the US and provide feedback on readiness to compete with driverless cars.

• Pneumatic-Based Emergency Brake Systems

  • 💨 Introduction of pneumatic activation valve and pressure regulator.
  • 💨 Redundancy system and monitoring for failures.
  • 💨 Simplification of brake system rules.
  • 💨 Importance of EBS reference guide for design and review of systems.
  • 💨 Examples of pneumatic-based emergency brake systems.
  • 💨 Components and functionality of pneumatic-based emergency brake systems.
  • 💨 Questionnaire for feedback on EBS reference guide and actuator usage in driverless vehicles.

• Emergency Brake System (EBS) and Service Brake

  • 🚨 Monitoring is crucial to ensure the functionality and safety of the emergency brake system.
  • 🚨 Redundancy is important to have two independent systems activating in case of failure.
  • 🚨 Deactivation of the emergency brake system is designed for track marshals to easily deactivate the car.
  • 🚨 Service brake, as defined in the rules, is the brake system used for control braking while driving.

• Safety Measures for Steering Actuator

  • ⚠️ Driverless vehicles require safety measures for steering actuator to prevent injuries to people.
  • ⚠️ Steering actuator should only start moving if the vehicle is ready to drive, with an exception for emergency brake situations.
  • ⚠️ Manual steering must be immediately possible after the autonomous system is switched off, allowing for easy removal of the car from the track.
  • ⚠️ The cockpit template for driverless vehicles must ensure proper fitting to cover all moving parts and avoid blocking or harm to the driver.
  • ⚠️ Systems requiring reference movement for steering wheel activation should not be used, and future autonomous driving should not increase steering forces too much to prevent driver exhaustion.
  • ⚠️ Examples of steering activators include rotary actuation and linear activation, each with its own advantages and considerations.
  • ⚠️ Functional safety in emergency brake systems requires redundancy and immediate stopping in case of failure.

Q&A

• Is monitoring required for all mechanical failures in driverless cars?

  Monitoring is not mandatory for mechanical failures that lead to a safe state in driverless cars. It is crucial for startup and redundant passes activation, while service brake under power loss can be considered as a redundancy point.

• What are the considerations for preparing teams and driverless cars for competitions?

  Teams should ensure good accessibility of EBS parts for sensor and actuator maintenance, keep preparation simple and fast, be prepared for rain tests and bad weather conditions, avoid depending on GPS signals for inspection missions, and plan for competitions, especially in the US.

• What are the important considerations for EBS inspection and preparation?

  EBS inspection necessitates ensuring easy access to parts, simple and fast preparation so that the vehicle enters the autonomous state within one minute, readiness for rain tests and bad weather conditions, and avoiding dependency on GPS signals. It's also important to plan for competitions, including providing feedback on the readiness to compete with driverless cars.

• How is the service brake defined in the context of driverless cars?

  The service brake, as defined in the rules, is the brake system used for control braking while driving.

• What components are involved in pneumatic-based emergency brake systems for driverless cars?

  The video discusses the pneumatic activation valve, pressure regulator, redundancy system, and EBS reference guide for emergency brake systems in driverless vehicles. It also presents examples and functionality of pneumatic-based emergency brake systems.

• Why is redundancy important for emergency brake systems in driverless vehicles?

  Redundancy in emergency brake systems is crucial for immediate stopping in case of failure. It ensures that there are two independent systems activating in emergencies, thus enhancing safety.

• What are the safety considerations for the steering actuator in driverless vehicles?

  The steering actuator in driverless vehicles should only start moving if the vehicle is ready to drive, with exceptions for emergency brake situations. Manual steering must be immediately possible after the autonomous system is switched off. Additionally, the cockpit template should ensure proper fitting to cover all moving parts and avoid harm to the driver.

• What safety measures are discussed for driverless cars?

  The presentation focuses on safety measures such as ASMS (autonomous system master switch), ASSI (autonomous system status indicator), and RES (remote emergency stop) for driverless cars.

• 00:07 The presentation covers hardware actuations for driverless cars, focusing on safety and hardware activators. It discusses safety measures such as ASMS, ASSI, and RES, as well as the steering and brake actuators.
• 05:20 The steering actuator in driverless vehicles requires safety measures to prevent injuries. Functional safety in emergency brake systems necessitates redundancy for immediate stopping in case of failure.
• 11:07 The video discusses the importance of monitoring for failures, redundancy, and deactivation in the emergency brake system. It also clarifies the concept of service brake within the system.
• 17:08 The speaker discusses the pneumatic activation valve, pressure regulator, redundancy system, and EBS reference guide for emergency brake systems in driverless vehicles, while asking for feedback and presenting examples of pneumatic-based emergency brake systems.
• 22:40 Teams use activators to monitor the brake pedal or a second master brake cylinder connected to the EBS actuator; pressure transducer system is the smartest but requires careful design and proper material selection. Technical inspection is crucial, and cars need to be prepared for thorough checks, including EBS functionality and restart time.
• 28:28 Preparing for EBS inspection involves ensuring easy access to parts, simple preparation, and readiness within one minute. Consider rain tests, avoid depending on GPS signals, and plan for competitions in the US.
• 33:38 Discussion about building a driverless car, feedback on team readiness for a competition, monitoring systems, service brake requirements, and steering actuator safety.
• 39:18 The speaker addresses questions related to failure detection, redundancy in brake systems, and supply paths for EBS valve. Monitoring is not required for certain mechanical failures, and redundancy in the EBS valve supply is not explicitly mandated.