面向商用车电控气压制动系统，研究综合考虑制动压力偏差与制动时间偏差的制动压力变化率，为实现电控气压制动系统精准制动控制提供基础。基于制动气室充气过程的数学模型，利用响应面法，得到制动压力变化率的关键影响因素，仿真分析关键影响因素对制动压力变化率的影响规律。通过制动压力变化率测量回路，实验验证仿真分析结果的正确性。研究结果表明：音速流导和供气压力对制动压力变化率的影响程度较大，其中，改变音速流导不仅影响制动压力变化率的大小，也影响制动压力变化率的响应时间。
Abstract
For the electronically controlled pneumatic brake system of commercial vehicles, the brake pressure change rate considering the deviation between brake pressure deviation and braking time is studied, which provides the basis for the precise brake control of the electronically controlled pneumatic brake system. Based on the mathematical model of the brake chamber inflation process, the response surface method is used to obtain the key influencing factors of the brake pressure change rate, and the influence law of the key influence factors of the brake pressure change rate is simulated. Finally, the correctness of the simulation analysis is verified by the brake pressure change rate measurement rig. The results indicate that, the sonic flow conductance and the supply pressure have a great influence on the brake pressure change rate; changing the sonic flow conductance not only affects the brake pressure change rate, but also affects the response time of the brake pressure change rate.
关键词
气压制动；制动压力变化率；响应面法；制动气室；影响因素
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Key words
pneumatic brake, brake pressure change rate, response surface methodology, brake chamber, influencing factor
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