直线电机驱动的地铁车辆在牵引或电制动时不受轮轨黏着的限制，将电制动介入紧急制动能提升制动性能。出于安全性考虑车辆依据防护曲线实时监测电紧急制动性能。为准确计算防护曲线，本文分析了执行装置的施加过程，对紧急制动性能建模；拟合并分析各执行装置的理论性能，得出瞬时理论紧急制动性能；结合性能模型和瞬时理论性能，推导出电紧急制动性能的临界条件；从安全性和可用性角度出发，对临界条件进行优化，求解出车辆的防护曲线。通过北京机场线车辆试验表明，车辆在110km/h速度等级下，判定系数取0.92，调整系数取-0.12时，减速度安全余量为2.7%，制动距离安全余量为5.3%，验证防护曲线的安全性和可用性

Metro vehicles driven by linear motor are not limited by wheel rail adhesion during traction or electric braking. The intervention of electric braking into emergency braking can improve the braking performance. For the sake of safety, the vehicle refers to the protection curve to monitor the electric emergency braking performance in real time. In order to accurately calculate the protection curve, the application process of the actuator was analyzed and the emergency braking performance was modeled in this paper. It was proposed to combine and analyze the theoretical performance of each actuator to obtain the instantaneous theoretical emergency braking performance. Combined with the performance model and instantaneous theoretical performance, the critical condition of electric emergency braking performance was deduced. From the perspective of safety and availability, the critical conditions were optimized and the protection curve of the vehicle was solved. The vehicle test of Beijing Airport Line showed that under the speed level of 110km / h, when the judgment coefficient is 0.92 and the adjustment coefficient is -0.12, the safety margin of deceleration is 2.7% and the safety margin of braking distance is 5.3%, which verifies the safety and availability of the protection curve.

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中国科协青年人才托举工程项目(2020QNRC001)