In CBTC (Communications-Based Train Control) operated metro lines, headway can be reduced by taking advantage of the system's train–track continuous communication, thus increasing transport capacity. When a train runs close enough to the preceding one, a tracking algorithm is triggered to control the distance between the trains. The following train receives the LMA (limit of movement authority) via radio, which is updated periodically as the preceding train runs. Besides transport capacity, one of railway operators’ main goals is the reduction of energy consumption, for environmental and economic reasons. This paper firstly shows that the existing basic CBTC tracking algorithm is not energy efficient, due to the application of short braking–traction cycles. It then proposes a new efficient algorithm that makes use of coast (null traction) command, and models the uncertainty associated with the speed of the preceding train. This fuzzy algorithm is compared to the basic one in terms of energy consumption, running time and steady state interval (resulting tracking interval). Simulation results show that the proposed fuzzy tracking algorithm provides important energy savings with minor influence on running time and steady state interval. This algorithm is suitable for implementation in on-board CBTC equipment to reduce the energy consumption of traffic operation.
Palabras Clave: Energy-efficiency; Tracking algorithm; Fuzzy parameters; CBTC signaling system; Moving block; Train simulation; Ecodriving; ATO
Índice de impacto JCR y cuartil WoS: 2.894 - Q1 (2016); 6.212 - Q1 (2020)
Referencia DOI: 10.1016/j.engappai.2016.03.011
Publicado en papel: Agosto 2016.
Publicado on-line: Abril 2016.
W. Carvajal, A.P. Cucala, A. Fernández-Cardador. Fuzzy train tracking algorithm for the energy efficient operation of CBTC equipped metro lines. Engineering Applications of Artificial Intelligence. Vol. 53, pp. 19 - 31 Agosto 2016. [Online: Abril 2016]