Four-layer full-stack chassis x-by-wire system architecture
Plain Text │ ECUCoder auto code generation │ | MeCa X-chassis calibration │ | SimCar X-by-wire HIL │ | SimCore vehicle dynamics simulation │ | Bus recorder │ | Steer-by-wire following control │ | Active suspension adjustment strategy │ | Vehicle posture closed-loop control │ | Multi-actuator coordinated scheduling │ | X-by-wire redundancy safety mechanism │ | Road-condition adaptation │ | Chassis fault diagnostics │ | Dynamic fault-tolerant degradation |├─────────────────────────────────────────────────────────┤ | S3 motion X-by-wire fusion controller │ | High-precision signal acquisition │ | High-speed PWM actuator drive │ | Multi-channel CAN FD/Ethernet │ | Dual-redundancy hardware design │ | Automotive-grade wide-temperature anti-interference architecture│ | Steer-by-wire angle tracking │ | Suspension posture adaptation │ | Chassis execution for intelligent driving │ | Stability control under extreme conditions │ | Vehicle dynamic performance optimization |└──────────────────────────────────────────────────────────────────────┘ |
System interconnection logic
Chassis attitude sensors, wheel-speed sensors, steering-angle sensors and braking / suspension actuators → chassis x-by-wire unit (dynamics calculation, precise command allocation, multi-mechanism coordination) → cross-domain coordinated execution by the vehicle central domain, motion domain and intelligent driving domain. The upper-computer toolchain completes the full closed loop of x-by-wire strategy modeling, automatic code generation, chassis dynamics HIL closed-loop simulation, real-vehicle performance calibration, production flashing and fault diagnostics.
1. Three-in-one all-domain x-by-wire coordinated control.
Integrating brake-by-wire, steer-by-wire and active suspension-by-wire into unified management, it breaks down the silos between traditional chassis systems and realizes real-time coordinated braking, steering and attitude adjustment, solving the fragmented handling, unsynchronized response and poor extreme-condition stability of traditional chassis, and building an all-domain electronic intelligent chassis.
2. High-precision dynamic command response.
Eliminating mechanical transmission play and lag errors, it adopts millisecond-level precision electrical signal transmission and closed-loop calculation; steering angle, braking force and suspension damping are steplessly and finely adjustable, with control precision far exceeding traditional mechanical chassis, perfectly matching the precise execution needs of high-level intelligent driving.
3. All-condition body attitude adaptive control.
With built-in high-precision vehicle dynamics algorithms, it identifies cornering, slopes, high speed, low-friction roads and heavy-load bumpy conditions in real time, actively adjusting suspension stiffness, braking distribution and steering assist to suppress cornering roll, stabilize high-speed attitude and optimize bumpy-road filtering, greatly improving vehicle ride quality.
4. Multi-redundancy safety and fault tolerance.
With dual hardware backup and software multi-redundancy design, it provides real-time fault detection, strategy degradation and redundancy takeover for sensor failures, actuator faults and bus anomalies, eliminating single-point failure risks of the x-by-wire system and fully meeting high-level autonomous driving functional safety requirements.
5. Deep intelligent-driving adaptation and closed-loop execution.
It precisely responds to all-scenario commands from the intelligent driving domain such as ACC, AEB, LCC and automatic lane change, achieving seamless connection between intelligent-driving decisions and chassis execution, solving the lagging execution, insufficient precision and poor following of traditional chassis, and greatly improving the smoothness and safety of intelligent driving.
6. Model-based development and full-scenario simulation.
X-by-wire chassis dynamics, coordinated control and safety redundancy strategies are quickly built on Simulink, and ECUCoder generates automotive-grade production code with one click. The dedicated x-by-wire HIL bench simulates hundreds of thousands of extreme road and fault conditions for strategy iteration and reliability validation, greatly reducing real-vehicle test risks.
1. Comprehensive chassis performance upgrade with handling feel benchmarked against premium joint-venture brands.
Electronic precision control thoroughly solves the play, slow response and poor smoothness of traditional mechanical chassis; vehicle steering precision, braking linearity and attitude stability are greatly improved, the handling ceiling under extreme conditions is significantly raised, and vehicle dynamic performance achieves a leap forward.
2. Self-controlled core technology breaking foreign monopolies.
X-by-wire coordination algorithms, dynamics calculation, redundancy safety strategies and chassis calibration logic are all developed in-house; the full toolchain has no overseas licensing binding, with fully open low-level code, enabling independent iteration of core chassis algorithms and accumulation of domestic high-end x-by-wire chassis core technology IP.
3. High development efficiency and rapid model adaptation.
With reusable same-source software and hardware and full upfront MIL/SIL/HIL verification, a large amount of chassis matching and strategy optimization is completed on virtual benches without repeated real-vehicle tuning; compared with traditional chassis development, R&D and calibration cycles are shortened by more than 50%.
4. Highly expandable architecture for intelligent driving iteration.
The x-by-wire electronic architecture naturally adapts to high-level autonomous driving upgrades; the software-hardware decoupled design allows continuous chassis performance optimization and intelligent chassis function expansion through software iteration, adapting to L2++ to L4 intelligent driving upgrades without hardware changes.
5. Lightweight, low-energy-consumption, high-durability vehicle.
Eliminating numerous mechanical transmission parts and hydraulic mechanisms simplifies the chassis structure, achieving vehicle lightweighting and reducing chassis mechanical losses and driving energy consumption; the electronic controllable design reduces component wear, greatly improving chassis service life and durability reliability.
6. Fully meeting automotive-grade mass production standards.
Strictly following the IATF 16949 automotive quality system and ISO 26262 functional safety development process, it supports the full set of DV/PV high/low temperature, vibration, endurance, EMC and fault-injection tests for the x-by-wire chassis, directly satisfying OEM mass-production audit standards for premium models.