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Precision stop method for D-series high-speed trains

An EMU and precise technology, applied in the direction of instruments, adaptive control, control/regulation systems, etc., can solve problems such as input time lag

Inactive Publication Date: 2018-03-20
HUNAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at some problems existing in the existing automatic parking algorithm, the present invention proposes an EMU inversion sliding mode precise parking algorithm with input time lag, aiming at solving the input time lag, accuracy and comfort during the EMU parking process sexual problems

Method used

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  • Precision stop method for D-series high-speed trains
  • Precision stop method for D-series high-speed trains
  • Precision stop method for D-series high-speed trains

Examples

Experimental program
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Effect test

Embodiment 1

[0146] The precise parking algorithm is to establish a suitable braking mathematical model, design a tracking controller with high control precision and good robustness, and realize precise tracking of the target braking curve. The higher the tracking accuracy of the target braking curve, the higher the parking accuracy . In addition, the resistance from the air and lines during the braking process is an uncertain disturbance, which affects the parking accuracy and comfort. The anti-interference ability of the algorithm can ensure the comfort and accuracy of parking.

[0147] The inversion sliding mode precise parking algorithm method for EMUs with input and input time lags comprises the following steps:

[0148] The first step. The establishment of the mathematical model of the brake system with hysteresis at input time is to obtain the operation object of the later algorithm. In the simulation, we need to use the mathematical model as the application object of the algorithm...

Embodiment 2

[0272] The operation and braking of the EMU is a complex time-delay nonlinear system, but the modeling mechanism for different types of EMUs in the experiment is the same, the difference is the running resistance and the different belts of the braking device. come parameter differences.

[0273] In the following, select the running resistance formula, input the system equation with the delay time as τ=1.2s and the system response time as T=0.4s:

[0274]d(t)=w(t)+2.09+0.039v+0.000675v 2

[0275] w(t) is the additional resistance added to the line during the parking process. The simulated line environment of this braking example is: when the braking reaches 1300 meters, add a ramp with a slope of 0.28, a turn with a radius of 600 meters, and a tunnel with a length of 10 meters. These three lines add resistance. The specific expressions and parameter settings are as follows:

[0276]

[0277] In the formula, θ is the thousandth fraction of the road slope, take θ=28; R is ...

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Abstract

The invention discloses a precision stop method for D-series high-speed trains, and aims at solving the problem concerning input delay, precision and comfort during the stop of D-series high-speed trains. The method includes a delay-free transformation method of a delay system, a back-stepping sliding mode variable structure controller design method, and a disturbance expansion observer design method. The delay-free transformation method is an equivalent change method, is simple to operate, and does not change the accuracy of the model. A back-stepping sliding mode variable structure controller integrates the advantages of a back-stepping design method and a sliding mode variable structure method, and has the advantages of high tracking accuracy, fast error convergence, strong robustness,and the like. By introducing a disturbance expansion observer, the anti-interference ability in the braking process is improved, and the complexity of back-stepping process controller design is reduced. Finally, the simulation and experimental results show that the problem of input delay is well solved, high stop precision can be obtained, and the stationarity and comfort in the braking process are ensured.

Description

technical field [0001] The patent of the present invention belongs to the technical field of high-speed railway braking, and in particular relates to a precise parking method for EMUs. Background technique [0002] High-speed rail is a major industry that can change the political and economic structure of the world since China's reform and opening up, and it is a major symbol of China's march towards a world power. With its vigorous development, the operating speed of high-speed railway is getting higher and higher, and the operating conditions are more complex and changeable, which puts forward higher requirements for the operating performance and control methods of EMUs. The braking system is one of the most critical systems of the EMU. The braking performance is directly related to the accuracy, comfort and safety of the EMU parking. Therefore, the braking process of the EMU is modeled and its parking algorithm research is particularly important. [0003] Traditional EM...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 张昌凡杨步充何静史来诚刘光伟何云国左新甜张辉
Owner HUNAN UNIV OF TECH
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