Development of adaptive front-light system based on rapid control prototype
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摘要: 针对传统车灯系统开发效率低、迭代周期长、实车仿真成本高，且无法满足现代汽车智能化需求等问题，基于前照灯自适应控制逻辑，提出前照灯照明角度偏转计算公式，构建自适应前照灯系统（adaptive front-lighting system, AFS）模型。利用基于dSPACE的快速控制原型（rapid control prototype, RCP）技术，将AFS模型快速转化为可运行的实时系统，模拟多种复杂驾驶场景验证AFS控制逻辑和照明角度偏转的准确性和合理性。应用结果表明，此开发方法缩短了系统开发周期，提高了开发效率，所提出的AFS显著提高了驾驶的安全性和舒适性。Abstract: Traditional vehicle lighting control system are characterized by low development efficiency, long iteration cycles, high costs of real-vehicle simulation, and an inability to meet the intelligent demands of modern automobiles. To address these issues, a calculation formula for the deflection of the headlamp's illumination angle was proposed based on the adaptive control logic of the headlamps, and a model of the adaptive front-lighting system (AFS) was constructed. Then, the AFS model was rapidly transformed intoan executable real-time system by utilizing the dSPACE-based rapid control prototyping (RCP) technology. Various complex driving scenarios were simulated to verify the accuracy and validity of the AFS control logic and the deflection of the illumination angle. The application results indicate that this development method shortens the system development cycle and improve development efficiency, and that the proposed AFS significantly enhances driving safety and comfort.
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图 6 车速与制动距离二次拟合图
Figure 6. Quadratic fitting diagram of vehicle speed and braking distance
图 8 AFS系统水平角度调整示意图
Figure 8. Schematic diagram of horizontal angle adjustment of AFS system
图 12 上位机与AutoBox连接流程图
Figure 12. Flow chart of connection between upper computer and AutoBox
图 13 硬件总体布局图
1—汽车前照灯；2—上位机；3—CAN总线；4—网口；5—MicroAutoBox II；6—电源箱。
Figure 13. General layout of hardware
表 1 车速与制动距离
Table 1. Vehicle speed and braking distance
车速/(km·h−1) 制动距离/m 车速/(km·h−1) 制动距离/m 10 3.6 70 43.5 20 7.6 80 53.7 30 12.7 90 64.9 40 19.0 100 77.0 50 26.2 110 88.4 60 34.4 120 104.2 
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