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The automotive steering system is evolving from EPS to advanced Steer-by-Wire (SBW) technology. As a core element of chassis technology, its performance has a crucial impact on vehicle handling stability and driving safety. To ensure the controller’s performance is optimized before the vehicle's final assembly, Hardware-in-the-Loop simulation testing has become an indispensable part of the development process.

VCARSYSTEM's Solution

VCARSYSTEM supports a comprehensive Steering/Steer-by-Wire HIL testing system that covers signal-level, power-level, and mechanical-level testing, providing precise verification for the main control board, main control board + inverter, and main control board + inverter + motor. The system can highly simulate the dynamic characteristics, road conditions, and driving operations of a real vehicle, evaluating the overall performance of the steering system through electronic signals directly connected to the steering controller.

HIL SYSTEM

VCARSYSTEM provides a complete HIL SYSTEM that covers multiple key areas, including the new energy three-electric field (BMS/VCU/MCU), ADAS autonomous driving field (ACC/LKA/AEB, etc.), vehicle body field, traditional automotive power field (EMS/EPS/ESP, etc.), and cockpit field, offering comprehensive hardware-in-the-loop testing services.

VCAR EM

VCAR EM is an engineering configuration software developed by VCARSYSTEM for the HIL platform, which can perform HIL engineering related configurations. It includes GPIO signal configuration, CAN/CANFD, LIN, Ethernet and other bus communication configurations, board hardware configuration, simulation object model import, signal mapping relationship configuration, real-time host multi-tasking allocation and management configuration, engineering compilation and other functions. At the same time, the software supports multi-tasking allocation management and multi-device cascade configuration, meeting different test scenario configuration requirements.

FUNCTIONS

Functional Verification

The functional verification comprehensively covers key functions such as basic assistance, damping compensation, inertia compensation, friction compensation, end-point protection, active return, active steering, and parking assist, ensuring that the system can perform steering tasks stably, accurately, and safely under various driving scenarios.

Performance Testing

By simulating a variety of driving conditions and vehicle speeds, the key performance indicators of the steer-by-wire system are thoroughly tested under different operating conditions. This includes precise control of steering force, rapid response of steering sensitivity, and quick steering response time.

Fault Injection Testing

By injecting fault scenarios such as low-voltage faults, signal open/short circuits, signal abnormalities (e.g., positioning and drift), signal noise, CAN communication faults, and diagnostic information errors, as well as TAS sensor faults, drive chip SPI faults, motor temperature simulations, phase current anomalies, encoder faults (signal loss, state errors, state stalling, calculation errors), and inverter faults (open/short circuits of UVW phases), the system is tested under various failure conditions.

Driving Environment Simulation

In conjunction with related tests, the system simulates various driving maneuvers under different road characteristics (e.g., surface friction coefficient, slope, side slope, roughness, etc.) with the target vehicle in various states (fully loaded/lightly loaded, different tire pressures, etc.). This includes various driver control actions (e.g., acceleration/deceleration, lane changes, steering angle steps, steering pulses, torque steps, torque pulses, serpentine maneuvers, and steady-state turns) to comprehensively evaluate the system's performance and adaptability.

ASSOCIATED PRODUCTS

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HIL SYSTEM

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