Intelligent Contact Force Regulation of Pantograph–Catenary Based on Novel Type-Reduction Technology

Abstract

In this paper, an intelligent control scheme is proposed to suppress vibrations between the pantograph and the catenary by regulating the contact force to a reference value, thereby achieving stable current collection. In order to reduce the computational cost, an interval Type-2 adaptive fuzzy logic control with the Moradi–Zirhohi–Lin type reduction method is applied to deal with model uncertainties and exterior interference. Based on a simplified pantograph–catenary system model, the comparative simulation results show that variation of the contact force can be attenuated and variation disturbances can be repressed simultaneously. Furthermore, in terms of computational burden, the proposed type reduction method outperforms other type reduction methods.

Experimental validation of fuzzy type‐2 against type‐1 scheme applied in DC/DC converter integrated to a PEM fuel cell system

“…The previous mentioned area is also known as the footprint of uncertainty (FOU) and it is limited between a lower and upper membership function for each case 58,59 . During the experiments that we carried out, we considered a 10% of uncertainty in respect to the membership functions defined for FLC‐T1.…”

“…The main difference in contrast with FLC-T1 comes in the definition of the membership rules which have a defined uncertainty as an area instead of a The previous mentioned area is also known as the footprint of uncertainty (FOU) and it is limited between a lower and upper membership function for each case. 58,59 During the experiments that we carried out, we considered a 10% of uncertainty in respect to the membership functions defined for FLC-T1. This value has already been considered in former investigations where FLC-T2 was involved.…”

Pantograph Catenary Contact Force Regulation Based on Modified Takagi-Sugeno Fuzzy Models

“…An actuator, an essential component of the PCS, applies the dynamic uplift force to the pantograph frame within the context of the active vibration control of a railway pantograph to significantly reduce the contact force's unpredictable fluctuation. Many control algorithms have been developed (simple PI controllers [5], robust controllers [6], adaptive controllers [7], backstepping controllers [8], predictive model controllers [9], intelligent controllers [10][11][12], and fuzzy controllers [13]) for producing adequate uplift force to regulate the fluctuation of the contact force. To manage the oscillations brought on by the unpredictable stiffness and to regulate the contact force taken into account as a pre-specified reference value, an intelligent contact force regulator, including MZL algorithms [14][15], is given in [10].…”

Vibration Characteristics Analysis and Structure Optimization of Catenary Portal Structure on Four-Wire Bridge

“…The portal structure is subjected to complex and variable loads. When the frequency of vibration and shock between pantograph and net is close to the natural frequency of the portal structure beam when the railway wagon is running, the resulting coupling resonance will affect the portal structure reliability [7,8]. The catenary system is the core part of electrified railway, the stable contact and interaction between pantograph and contact line is also the most important condition for safe power supply.…”