Steer-by-Wire (SbW)

The Steer-by-Wire (SbW) system replaces the traditional mechanical connection between the steering wheel and the wheels with an electronic system. It converts the driver’s steering input into electrical signals that control the steering mechanism for precise, responsive handling. SbW technology enhances operational safety and convenience, allowing for more accurate vehicle control by reducing direct human intervention. However, with the removal of the traditional steering column, ensuring the safety and reliability of SbW systems remains a significant focus.

HiRain Technologies’ SbW solution consists of a Steering Wheel Actuator (SWA) and a Road Wheel Actuator (RWA), both designed with full redundancy and master-slave control for enhanced reliability. The system is developed in compliance with ISO 26262 (functional safety) and DIN 70065 (degradation mode), leveraging HiRain’s extensive expertise in safety and reliability engineering.

Product Functions

• Basic Steering
• Road Feel Feedback
• Power-On Steer Alignment
• Variable Gear Ratio Control
• Virtual End Protection
• Road Wheel Stall Protection
• ADAS Steering Control
• Secure Boot and Secure Flashing
• Hardware Encryption/Decryption, Secure Onboard Communication
• Supports Functional Safety up to ASIL D
• Over-the-Air (OTA) Updates

Product Features

• Safe and Reliable
• Low Latency with High Precision
• Variable Gear Ratio Control to Adapt to Diverse Driving Conditions
• Customizable Steering Feel, with Reduced Road Vibration and Impacts
• Supports Advanced L4+ ADAS

Customer