Analysis and Treatment of Metro Platform Screen Door Controller System Fault

Sometimes the PEDC (platform edge door controller) crash of the platform screen door (PSD) system on Hangzhou metro Line 2 and Line 4 happens, leading to the troubles of PSD when receiving PEDC opening and closing instructions. Through analyzing the control logic of PSD, an automatic back-up controller system of PEDC is designed, which will solve the crashing problem of PEDC in case of outrage maintenance or replacement, then the back-up PEDC controller will quit automatically after the PEDC returns to normal. This system has been applied to Hangzhou metro Line 2 with expected performance.