Dynamic Suspension Solution using Analog Devices 10BASE-T1S E2B technology
Dynamic Suspension Solution using Analog Devices 10BASE-T1S E2B technology
Feb 11 2025
The automotive industry is gradually shifting from domain based towards zonal architecture and software-defined vehicles (SDV) to reduce costs, minimize cable harnesses, and accelerate time to market. The IEEE 802.3-2022 10BASE-T1S Ethernet specification providing 10 Mbps Data rate for over short distance. This new Ethernet standard enables OEMs to expand Ethernet in the vehicle network to the edge interfacing with sensors and actuators on the same bus. This allows the OEMs to easily replace legacy bus technologies such as CAN or FlexRay. Bringing all Ethernet in cars removes the need for bridging protocols and simplifies the transition to zonal architecture. In this architecture, sensors and actuators connect directly to the nearest ECU, regardless of their functions. This approach helps reduce the number of ECUs in the vehicle, decreasing both cable harness and overall weight.
Traditionally, edge sensor and actuator applications require a bus technology specific physical layer (PHY) locally connected to a microcontroller (uC). This uC runs software to bridge between sensors or actuator and the bus to the central processing unit. Long software development cycles and deployment time lead to higher costs. Multiple different software providers complicate software implementation and maintenance.
ADI developed E2B, a remote control protocol (RCP). This RCP accelerates the adoption of 10BASE-T1S by simplifying the networking, sensor and actuator connection, and eliminates the need for microcontrollers in the edge nodes. Now all edge nodes can be a complete hardware implementation with all software centralized which aligns directly with the move to SDV.
The demo highlights the advanced E2B capabilities in a suspension system. E2B enables deterministic low latency control loop with precise synchronization using gPTP to ensure the ball is balanced.
A central controller running all software connects in a multidrop topology with four E2B edge nodes each controlling a motor via PWM signals. The ball's position is sensed from a touchscreen, fed as ADC input to one of the edge nodes, converted to position data by the controller, and processed through a PID loop (Proportional, Integral and Derivative terms in a control loop system) to adjust motor movement in the X and Y directions. This demo showcases that tight control loops of less than 4 ms are possible running on a shared medium.
Dynamic Suspension Solution using Analog Devices 10BASE-T1S E2B technology
Feb 11 2025
The automotive industry is gradually shifting from domain based towards zonal architecture and software-defined vehicles (SDV) to reduce costs, minimize cable harnesses, and accelerate time to market. The IEEE 802.3-2022 10BASE-T1S Ethernet specification providing 10 Mbps Data rate for over short distance. This new Ethernet standard enables OEMs to expand Ethernet in the vehicle network to the edge interfacing with sensors and actuators on the same bus. This allows the OEMs to easily replace legacy bus technologies such as CAN or FlexRay. Bringing all Ethernet in cars removes the need for bridging protocols and simplifies the transition to zonal architecture. In this architecture, sensors and actuators connect directly to the nearest ECU, regardless of their functions. This approach helps reduce the number of ECUs in the vehicle, decreasing both cable harness and overall weight.
Traditionally, edge sensor and actuator applications require a bus technology specific physical layer (PHY) locally connected to a microcontroller (uC). This uC runs software to bridge between sensors or actuator and the bus to the central processing unit. Long software development cycles and deployment time lead to higher costs. Multiple different software providers complicate software implementation and maintenance.
ADI developed E2B, a remote control protocol (RCP). This RCP accelerates the adoption of 10BASE-T1S by simplifying the networking, sensor and actuator connection, and eliminates the need for microcontrollers in the edge nodes. Now all edge nodes can be a complete hardware implementation with all software centralized which aligns directly with the move to SDV.
The demo highlights the advanced E2B capabilities in a suspension system. E2B enables deterministic low latency control loop with precise synchronization using gPTP to ensure the ball is balanced.
A central controller running all software connects in a multidrop topology with four E2B edge nodes each controlling a motor via PWM signals. The ball's position is sensed from a touchscreen, fed as ADC input to one of the edge nodes, converted to position data by the controller, and processed through a PID loop (Proportional, Integral and Derivative terms in a control loop system) to adjust motor movement in the X and Y directions. This demo showcases that tight control loops of less than 4 ms are possible running on a shared medium.
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