高速列车车内压力波动模糊控制研究

Study on Air Pressure Fluctuation Control of High-speed Train Based on Fuzzy Control

摘要:

高速列车在通过隧道或两车交会时,列车表面会产生很大的气压波动,此压力波动通过车体缝隙和换气风机、风道传入车内,引起车内空气压力较大波动,造成乘客耳鸣、耳痛等症状,影响乘坐舒适性；为了抑制高速列车车内压力波动,根据某型高速列车换气风机特性曲线与车体等效泄露关系,建立了换气风机频率可变的车内外空气压力传递数学模型；采用模糊控制策略,以车内压力、车内压力变化率为控制输入,对高速列车换气系统中的新风风机、废排风机运行频率进行调节；仿真结果表明:该控制方式能够提高现有换气系统对车内空气压力波动的抑制能力,提高乘坐舒适性。 

Abstract:

When high-speed train passes through the tunnel or meets each other, the air pressure fluctuation will be generated on the train surface. This fluctuation passes through the body gap and ventilation fan, air duct into the train, which will impact the air fluctuation inside of the train, and symptom of tinnitus or earache may appear, which has an impact on the travelling comfort. In order to restrain the fluctuation of pressure in the high-speed train, according to the characteristic curve of ventilator fan and equivalent leak relations of car body, the transfer relationship between inside and outside is built. The interior pressure and the interior pressure change rate are taken as the control input. The fuzzy algorithm is used to adjust the frequency of the fresh air fan and exhaust fan. The simulation results show that:this control method can improve the inhibition ability of the existing ventilation system and the travelling comfort.