Chengshi guidao jiaotong yanjiu (Jun 2024)
Intelligent Control of Tram Braking Signal Switching Based on Dual-core Controller
Abstract
Objective As the tram braking signal switching requires fully considering the distance between traffic intersections and the actual traffic flow, the specific control effect is hard to be guaranteed. Therefore, an intelligent control method for the tram braking signal switching based on dual-core controller is proposed. Method With STMicroelectronics STM32 dual-core multi-protocol wireless microcontroller as the specific central device, three different actions are set respectively in three channels of DMA (direct memory access) controller, at the same time, the phase control adjustment matrix of the brake signal performs multi-dimentional settings based on the time step to establish the brake signal action space. Based on the current tram signal status, the deterministic gradient parameter of switching brake signal is defined from the perspective of action value. STM32 wireless MCU (micro-control unit) is used to train the value loss and value reward of feedback action, and the deterministic gradient parameter of switching brake signal is calculated as the benchmark of brake signal switching control. The simulation test environment is built and the control group is set for comparative test to verify the performance of the control method. Result & Conclusion The control delay of the intelligent control method for tram brake signal switching based on dual-core controller always remains stable within 0.4 s, and the deviation between the actual execution time and the setting time of the brake signal (red light) keeps within 0.04 s, and the waiting queue length is always lower than that of the control group, superior to the control group in terms of real-time, accuracy and reliability. The above method can improve operation efficiency and safety of the tram.
Keywords
