Dynamic Responses of HTS Maglev System Under Track Random Irregularity

Wang, Li; Deng, Zigang; Wang, Hongdi; Li, Haitao; Li, Kaiying; Ma, Shunshun

doi:10.1109/tasc.2020.2976995

Cited by 17 publications

(4 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Unlike the guideway in the rail system, magnetic inhomogeneity due to permanent magnets and misalignment associated with assembly can cause vertical and lateral irregularities in PMG. As stated in previous studies, the height of the irregularity generally varies from 2 mm to 3 mm [17,25]. The frequency content of the road roughness is usually used for the classification [26].…”

Section: Road Surface Roughnessmentioning

confidence: 96%

The effect of the modelling approaches in the assessment of comfort and curve negotiation performance of a small-scale maglev vehicle

Yıldız

2023

Phys. Scr.

View full text Add to dashboard Cite

In this article, a new co-simulation method was presented for high-temperature superconducting (HTS) magnetic levitation (Maglev) systems by utilizing H-formulation that is implemented in COMSOL Multiphysics®. A comparative study was conducted to evaluate the curve negotiation performance, which is closely related to its stability, of the HTS maglev vehicle running on a multi-surface permanent magnet guideway (PMG). Also, Sperling’s ride index method was used to evaluate ride comfort. Different from the existing related models of this subject, the dynamics of free-falling were incorporated into the modelling approach to simulate the actual running conditions of the vehicle. In addition, because of considering the non-stationary dynamics of the induced supercurrent in the HTS domain, the proposed approach and the selected route design provide simulation results that are close to the actual application of the HTS maglev vehicle. The results show that the performance indicators of the co-simulation greatly deviate from those of the existing curve-fitting-based models with increasing velocity.

show abstract

Section: Road Surface Roughnessmentioning

confidence: 96%

The effect of the modelling approaches in the assessment of comfort and curve negotiation performance of a small-scale maglev vehicle

Yıldız

2023

Phys. Scr.

View full text Add to dashboard Cite

show abstract

“…Our group [6] conducted a comprehensive analysis of the flux pinning characteristic and determined the lateral and vertical dynamic coupling interactions between HTS bulks and the Permanent Magnetic Guideway (PMG), a relationship we have termed the "magnetic-track relationship". The dynamic characteristics of the HTS maglev vehicle have been studied to verify its application feasibility [7][8][9]. Several prototypes of HTS maglev vehicles have been created, envisioning the future of high-speed train transit, including the 45 m HTS maglev test ring, known as "Super-Maglev".…”

Section: Introductionmentioning

confidence: 99%

Study on the Dynamics Characteristics of HTS Maglev Train Considering the Aerodynamic Loads under Crosswinds

Li,

Wang,

Ding

et al. 2023

Sustainability

Self Cite

View full text Add to dashboard Cite

High-temperature Superconducting (HTS) maglev trains are vulnerable to the effects of crosswinds when operating at high speeds in open-air conditions, potentially compromising riding comfort and safety. This study established a vehicle dynamic model based on the nonlinear maglev-track relationship and added aerodynamic loads under crosswinds to the train’s simplified load center to address this issue. Using the maximum vibration acceleration limit and the Sperling index, we evaluated the riding comfort of the HTS maglev train under different conditions. Further, the vibration acceleration power spectral density was analyzed to reveal the impact of increasing the train’s operating speed and crosswind speed. The results indicated that the lateral and vertical Sperling index achieved an “excellent” rating, even at crosswind speeds of up to 20.7 m/s when the train was traveling at speeds of up to 600 km/h. However, it was noted that particular attention should be given to the riding comfort in the head car when the speed reaches 600 km/h. Moreover, the influence of the increase in train speed on the vibration frequency domain distribution of the three car bodies and the train’s riding comfort is greater than that of the increase in the crosswind speed. These findings may provide a valuable reference for the future engineering application of the HTS maglev train.

show abstract

“…Moreover, Wu et al (2021); Wu et al (2020a) found that the steady development of aerodynamic effects in the high-speed stage affects the stability of the time delay maglev systems with feedback control. Additionally, linear control may encounter difficulties with regard to track irregularity and vehicle-bridge coupling vibration (Li et al, 2020; Wang et al, 2020a). Maglev systems are altogether naturally non-linear.…”

Section: Introductionmentioning

confidence: 99%

Study of chattering suppression for the sliding mode controller of an electromagnetic levitation system

ZHANG

Zeng

et al. 2022

Journal of Vibration and Control

View full text Add to dashboard Cite

Due to the inherent non-linearity and open-loop instability of maglev systems, their high-quality control performance is critical in the development stage. Sliding mode control has great potential in the field of maglev vehicle control because of its superior control performance, robustness and interference resistance. In practical applications of sliding mode control, however, the limitations of the hardware physical properties and time delay of the control units of maglev systems can cause chattering, thereby significantly reducing the stability of maglev vehicles. In order to suppress chattering, a modified sliding mode controller that combines the exponential reaching law and continuous control laws is proposed in this study. A single-point levitation experimental platform and corresponding co-simulation model were built, and a parameter influence analysis of the modified sliding mode controller was conducted. This paper presents an adaptive correction method for the sliding mode control parameters based on the aforementioned chattering study. The actual levitation experiments were used to validate the control performance of the proposed controllers. Overall, the conducted research revealed that the modified controllers could effectively suppress chattering and possess excellent robustness.

show abstract

Dynamic Responses of HTS Maglev System Under Track Random Irregularity

Cited by 17 publications

References 28 publications

The effect of the modelling approaches in the assessment of comfort and curve negotiation performance of a small-scale maglev vehicle

The effect of the modelling approaches in the assessment of comfort and curve negotiation performance of a small-scale maglev vehicle

Study on the Dynamics Characteristics of HTS Maglev Train Considering the Aerodynamic Loads under Crosswinds

Study of chattering suppression for the sliding mode controller of an electromagnetic levitation system

Contact Info

Product

Resources

About