scholarly journals Research on Siding Mode Controller of High-Speed Maglev Train Under Aerodynamic Load

2021 ◽  
Author(s):  
Meng-juan Liu ◽  
Han Wu ◽  
Xiao-Hui Zeng ◽  
Bo Yin ◽  
Zhan-zhou Hao
Keyword(s):  
High Speed ◽  
Vibration Suppression ◽  
Sliding Mode ◽  
Impact Load ◽  
External Disturbance ◽  
Aerodynamic Load ◽  
Suspension Stability ◽  
Maglev Train ◽  
Suspension Control ◽  
Dynamic Simulation Model

Abstract The high-speed maglev train will be subjected to extremely obvious aerodynamic load during operation, it will also be subjected to instantaneous aerodynamic impact load in the case of passing, which will bring extreme challenges to the suspension stability and safe operation of the train. It is necessary to consider the influence of aerodynamic load and shock wave in the design of suspension control algorithm. Traditional proportion integration differentiation (PID) control cannot follow the change of vehicle parameters or external disturbance, which is easy to cause suspension fluctuation and instability. In order to improve the suspension stability and vibration suppression of high-speed maglev train under aerodynamic load and impact, a controller based on sliding mode technique is designed in this paper, and in this controller, the deformation of the primary suspension is introduced to replace the aerodynamic load on the electromagnet. In order to verify the control performance of the designed controller, the dynamic simulation model of train with three vehicles is established, and the dynamic response of the train under the condition of passing in open air is calculated. Compared with the PID controller, it is verified that the sliding mode control (SMC) method proposed in this paper can effectively restrain the electromagnet fluctuation of the train under aerodynamic load.

636 A High-Speed and High-Precision Position Control for Vibration Suppression Using Sliding Mode Compensator

2009 ◽  
Vol 2009 (0) ◽  
pp. _636-1_-_636-4_
Author(s):  
Takashi FUJIMOTO ◽  
Takeshi NAKAHARA ◽  
Kazuhiro Tsuruta ◽  
Feng ying CAO
Keyword(s):  
High Precision ◽  
High Speed ◽  
Position Control ◽  
Vibration Suppression ◽  
Sliding Mode

Design and Implementation of a Rocket Launcher with Improved High Speed & Accuracy

2012 ◽  
Vol 466-467 ◽  
pp. 1334-1338 ◽  
Author(s):  
De Ying Li
Keyword(s):  
Sliding Mode Control ◽  
High Speed ◽  
Position Control ◽  
Control Method ◽  
Sliding Mode ◽  
External Disturbance ◽  
Strong Impact ◽  
Internal Mode ◽  
Mode Control ◽  
Speed Accuracy

Aiming at high speed and accuracy position control, this paper introduces design of an optimal internal mode control and sliding mode control for rocket launcher servo systems which have large varied moment of inertia, strong impact moment and load moment. Internal mode control designed by LQR theory can satisfy system requirement of the position loop in PMSM system. Sliding mode control can restrain effects that caused by model parameter perturbation and external disturbance and realize high performance position control. Simulation results show that the control method is simple and has better performances compared with PID controller.

scholarly journals Sliding Mode Control with PD Sliding Surface for High-Speed Railway Pantograph-Catenary Contact Force under Strong Stochastic Wind Field

2017 ◽  
Vol 2017 ◽  
pp. 1-16 ◽  
Author(s):  
Yang Song ◽  
Zhigang Liu ◽  
Huajiang Ouyang ◽  
Hongrui Wang ◽  
Xiaobing Lu
Keyword(s):  
Contact Force ◽  
Wind Field ◽  
High Speed ◽  
Sliding Mode ◽  
External Disturbance ◽  
Mechanical Impedance ◽  
Sliding Surface ◽  
High Speed Railway ◽  
Switching Law ◽  
Catenary System

As is well known, the external disturbance (especially the stochastic wind load) has nonnegligible effect on the operation of pantograph-catenary system, which may cause the strong fluctuation in contact force as well as the increased occurrence of contact loss. In order to improve the current collection quality of a high-speed railway pantograph-catenary system under a strong stochastic wind field, a sliding mode controller with a proportional-derivative (PD) sliding surface for a high-speed active pantograph is proposed. The nonlinear finite element procedure is employed to establish the catenary model. The fluctuating wind speeds along catenary are simulated using empirical spectrums. The buffeting forces exerted on contact and messenger wires are derived to construct the stochastic wind field along the catenary. A PD sliding surface is properly determined to guarantee that the mechanical impedance of pantograph head at the dominant frequencies of contact force decreases when the sliding surface approaches zero. Through several numerical simulations with different wind velocities and wind angles, the control performance of two popular control laws (proportional switching law and constant switching law) is evaluated.

The Cruise and Active Suspension Control for High Speed Train

2006 ◽  
Author(s):  
Chih-Jer Lin ◽  
Wan-Quan Xu
Keyword(s):  
High Speed ◽  
High Efficiency ◽  
Sliding Mode ◽  
Active Suspension ◽  
Complete Analysis ◽  
High Speed Train ◽  
Cruise Control ◽  
Train Control ◽  
Suspension Control ◽  
Train System

This paper presents a complete analysis of the cruise control and the active suspension control for the high speed train (HST). For a train system, the system are designed to being safe and reliable with high efficiency and fault tolerance; however, users require faster, more stable and more comfort transportation. To make sure the safety at such high speed, automatic train control (ATC) is needed and used for the modern HST to guarantee the safety and monitor the cruise status. For HST, the conventional (passive) suspension techniques have reached the limit of its optimization and development; therefore, the active suspension system is necessary for HST to obtain better comfort. In this paper, the extended sliding mode control is studied and applied to the cruise and active suspension of the HST.

Vibration Control of Nonlinear Rotating Beam Using Piezoelectric Actuator and Sliding Mode Approach

2006 ◽  
Author(s):  
X. Xue ◽  
J. Tang
Keyword(s):  
Vibration Control ◽  
Piezoelectric Actuator ◽  
Vibration Suppression ◽  
Control Method ◽  
Sliding Mode ◽  
External Disturbance ◽  
Rotating Beam ◽  
System States ◽  
Euler Bernoulli Beam ◽  
Beam Transverse Vibration

In this research, we develop a general methodology for the vibration control of nonlinear rotating beam. The dynamic model of a rotating Euler-Bernoulli beam integrated with piezoelectric actuator is formulated. An integral sliding mode control design is proposed for the vibration suppression of the system with nonlinear coupling effects between the hub rotation and the beam transverse vibration. The sliding surface is constructed using part of the system states, and the rotating hub dynamics is treated as the internal dynamics of the system under the condition that the states of the zero dynamics are bounded. The robust stability of the proposed controller is also guaranteed. A series of simulation studies demonstrate that the proposed control method can effectively suppress the beam vibrations induced by the hub rotation and the external disturbance.

scholarly journals Aerodynamic Analysis of Pressure Wave of High-Speed Maglev Vehicle Crossing: Modeling and Calculation

Energies ◽  
2019 ◽  
Vol 12 (19) ◽  
pp. 3770
Author(s):  
Gao ◽  
Ni ◽  
Lin ◽  
Luo ◽  
Ji
Keyword(s):  
Pressure Wave ◽  
High Speed ◽  
Calculation Model ◽  
The Body ◽  
Aerodynamic Load ◽  
Maglev Train ◽  
Aerodynamic Analysis ◽  
Simulation Techniques ◽  
Maglev Vehicle ◽  
Full Speed

When two maglev trains travel in opposite directions on two adjacent tracks, train crossingis inevitable. Especially when both trains run at full speed, the pressure wave formed by each otherwill have a significant impact on the structure of the vehicle. Therefore, it is important to understandthe pressure distribution on the body surface during the crossing to mitigate impact of the pressurewave. In this work, numerical simulation techniques are employed to reveal the nature of pressurewave during train crossing. Firstly, the aerodynamic load calculation model and the pressure wavecalculation model are established, based on the turbulence model and flow field control equation.Secondly, the governing equations are discretized together with determined correspondingboundary conditions, which leads to an effective numerical analysis method. Finally, thecorresponding aerodynamic analysis is carried out for the high-speed maglev test vehicle runningat speed 500 km/h on the open-air line. The simulation results reveal that the spot which sustainsthe most pressure fluctuation is at the widest part of the vehicle during the train crossing. This formsvaluable insights on the aerodynamic nature of high-speed maglev train and provides necessaryinputs to the structural design of the vehicle.

Research on intelligent vibration suppression control of high-speed lightweight Delta robot

2021 ◽  
pp. 107754632110248
Author(s):  
Kunming Zheng
Keyword(s):  
High Speed ◽  
Vibration Suppression ◽  
Control Method ◽  
Sliding Mode ◽  
Parallel Robot ◽  
Residual Vibration ◽  
Terminal Sliding Mode ◽  
Position Accuracy ◽  
Operation Stability ◽  
Delta Robot

Lightweight Delta robot is typical high-speed and high-precision industrial parallel robot. However, under high-speed condition, because of the lightweight components, it will inevitably lead to the vibration of Delta robot, which reduces the position accuracy and positioning efficiency. To solve this problem comprehensively, this article considers the process vibration and residual vibration of Delta robot, and the intelligent shaping vibration suppression control system is designed by using trajectory planning method of improved trapezoidal mode, shaping control method, and fast terminal sliding mode controller, and the detailed experimental analysis is carried out. The experimental results show that the proposed intelligent shaping vibration suppression control method can well suppress the process vibration and residual vibration of Delta robot, which can effectively improve the operation stability, work efficiency, and position accuracy of Delta robot.

Sign in / Sign up

Export Citation Format

Share Document