Mathematical Model Optimization of Electromagnetic Suspension System Based on Additional Constraints

In a rail vehicle, fatigue fracture causes a significant number of failures in the coil spring of the suspension system. In this work, the origin of these failures is examined by studying the rail wheel–track interaction, the modal analysis of the coil springs and the stresses induced during operation. The spring is tested experimentally, and a mathematical model is developed to show its force vs. displacement characteristics. A vertical 10-degree-of-freedom (DOF) mathematical model of a full-scale railway vehicle is developed, showing the motions of the car body, bogies and wheelsets, which are then combined with a track. The springs show internal resonances at nearly 50–60 Hz, where significant stresses are induced in them. From the stress result, the weakest position in the innerspring is identified and a few guidelines are proposed for the reduction of vibration and stress in rail vehicles.

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Predictive Control of an Electromagnetic Suspension System via Modified Locally Linear Model Tree with Merging Ability

2006 IEEE Conference on Cybernetics and Intelligent Systems ◽

10.1109/iccis.2006.252301 ◽

2006 ◽

Cited By ~ 1

Author(s):

Atiye Jamab ◽

Iman Mohammadzaman

Keyword(s):

Linear Model ◽

Predictive Control ◽

Suspension System ◽

Electromagnetic Suspension ◽

Model Tree ◽

Locally Linear Model Tree ◽

Locally Linear

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Fixed-point DSP implementation of nonlinear controller for large gap electromagnetic suspension system

Control Engineering Practice ◽

10.1016/j.conengprac.2009.04.014 ◽

2009 ◽

Vol 17 (10) ◽

pp. 1148-1156 ◽

Cited By ~ 5

Author(s):

Paulo H. da Rocha ◽

Henrique C. Ferreira ◽

Michael C. Porsch ◽

Roberto M. Sales

Keyword(s):

Fixed Point ◽

Suspension System ◽

Nonlinear Controller ◽

Electromagnetic Suspension ◽

Dsp Implementation

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Test Analysis of a Six-Wheel Hydraulic Active Suspension Control System

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.591-593.1710 ◽

2012 ◽

Vol 591-593 ◽

pp. 1710-1714

Author(s):

Wei Chen ◽

Zhi Yao ◽

Qing Bo Zhao ◽

Tong Jian Wang

Keyword(s):

Mathematical Model ◽

Control System ◽

Active Suspension ◽

Hydraulic Cylinder ◽

Suspension System ◽

Quantitative Feedback Theory ◽

Test Analysis ◽

Suspension Control ◽

System Robustness ◽

Road Performance

In order to make the active hydraulic suspension system to adaptive the ground. Taking the asymmetric valve controlled hydraulic cylinder as actuators, a six wheels hydraulic active suspension was designed. It is difficult to analysis of the six wheels system. So this paper established the single wheel’s mathematical model to instead analysis of the whole system, designed QFT (Quantitative Feedback Theory) controller which can be a solution to the system robustness, researched the hydraulic active suspension system. The results show that it is good for tracking performance of the hydraulic cylinder which taking the asymmetric valve controlled as actuators, system responses timely and the controller can meet the controlling requirements. This hydraulic active suspension system can improve off-road performance of engineering vehicles.

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Research and Improvement of the Hydraulic Suspension System for a Heavy Hydraulic Transport Vehicle

Applied Sciences ◽

10.3390/app10155220 ◽

2020 ◽

Vol 10 (15) ◽

pp. 5220 ◽

Cited By ~ 1

Author(s):

Jianjun Wang ◽

Jingyi Zhao ◽

Wenlei Li ◽

Xing Jia ◽

Peng Wei

Keyword(s):

Mathematical Model ◽

Nonlinear System ◽

Ride Comfort ◽

Impact Force ◽

Suspension System ◽

Experimental Results ◽

Hydraulic Transport ◽

Transport Vehicle ◽

Set Up ◽

The Impact

In order to ensure the ride comfort of a hydraulic transport vehicle in transportation, it is important to account for the effects of the suspension system. In this paper, an improved hydraulic suspension system based on a reasonable setting of the accumulator was proposed for a heavy hydraulic transport vehicle. The hydraulic transport vehicle was a multi-degree nonlinear system, and the establishment of an appropriate vehicle dynamical model was the basis for the improvement of the hydraulic suspension system. The hydraulic suspension system was analyzed, and a mathematical model of the hydraulic suspension system with accumulator established and then analyzed. The results revealed that installing the appropriate accumulator can absorb the impact pressure on the vehicle, while a hydraulic suspension system with an accumulator can be designed. Further, it was proved that a reasonable setting for the accumulator can reduce the impact force on the transport vehicle through simulation, and the optimal accumulator parameters can be obtained. Finally, an experiment in the field was set up and carried out, and the experimental results presented to prove the viability of the proposed method.

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