Dynamic Analysis on Rotor System Supported by Active Magnetic Bearings based on Sliding Mode Control

2018 ◽  
Author(s):  
Tingchen Du ◽  
Yanhua Sun ◽  
Haipeng Geng ◽  
Yibin Li ◽  
Hao Lv ◽  
...  
Keyword(s):  
Sliding Mode Control ◽  
Dynamic Analysis ◽  
Sliding Mode ◽  
Rotor System ◽  
Magnetic Bearings ◽  
Active Magnetic Bearings ◽  
Mode Control

Dynamic analysis and fractional-order adaptive sliding mode control for a novel fractional-order ferroresonance system

2017 ◽  
Vol 26 (8) ◽  
pp. 080503 ◽  
Author(s):  
Ningning Yang ◽  
Yuchao Han ◽  
Chaojun Wu ◽  
Rong Jia ◽  
Chongxin Liu
Keyword(s):  
Sliding Mode Control ◽  
Dynamic Analysis ◽  
Fractional Order ◽  
Sliding Mode ◽  
Adaptive Sliding Mode Control ◽  
Adaptive Sliding Mode ◽  
Mode Control

Dynamic Analysis and Sliding Mode Control of a Novel Extendable Modular Multi-DOFs Link

2012 ◽  
Author(s):  
Hak Yi ◽  
Je Hong Yoo ◽  
Reza Langari
Keyword(s):  
Sliding Mode Control ◽  
Dynamic Analysis ◽  
Sliding Mode ◽  
Free Motion ◽  
Modular Robot ◽  
Nonlinear Controller ◽  
Control Approach ◽  
Mode Control ◽  
Reachable Workspace ◽  
Simulation Results

In this paper, we have considered the new extendable modular multi-DOFs link to have a larger reachable workspace and more dexterous manipulability, as compared to a typical link. As a part of the extendable modular robot (EMR), our link is implemented to allow free motion when performing required tasks. In addition, this paper deals with a function of adjusting the link’s length (within 25% of the nominal length). Our investigation also focuses on the dynamics of a multi-DOFs link and the nonlinear controller for a given trajectory. The simulation results show the effectiveness of this control approach.

scholarly journals Sliding Mode Control of Magnetic Bearings: Comparison of Sensed and Self Sensing Performance

1999 ◽  
Author(s):  
S. Ueno ◽  
J. H. Lee ◽  
P. E. Allaire ◽  
Y. Okada
Keyword(s):  
Sliding Mode Control ◽  
Sliding Mode ◽  
Angular Displacement ◽  
State Space Model ◽  
Experimental Results ◽  
Magnetic Bearings ◽  
Small Scale ◽  
Linear Component ◽  
Mode Control ◽  
Physical Sensors

A sliding mode control algorithm has been designed for control of a balance beam on two symmetric magnetic bearings. A state space model of the system is developed and the controller is separated into a linear and non-linear component. A reaching condition to bring the system to the sliding surface is developed and a continuous function boundary layer approach is evaluated to avoid chattering. Previous works have discussed theoretical and experimental sliding mode control with physical sensors. This paper represents the first use of a simple envelope filter for sliding mode self sensing. The system simulation demonstrates arrival at the hyperplane surface within 0.003 sec and converges to the zero angular displacement value within 0.008 sec. Experimental results produced system convergence to zero angular displacement within approximately 0.35 sec both for the case when an eddy current position sensor was used and the case when system self sensing was employed. Some small scale chatter was observed in the experimental results with a peak to peak magnitude of approximately 3 times larger in the self-sensing case as compared to the case with a physical sensor.

Sliding Mode Control of a Rigid Rotor via Magnetic Bearings

1991 ◽  
Author(s):  
A. Sinha ◽  
K. L. Mease ◽  
K. W. Wang
Keyword(s):  
Sliding Mode Control ◽  
Sliding Mode ◽  
Magnetic Bearings ◽  
Control Law ◽  
Rigid Rotor ◽  
Coil Current ◽  
Analytical Technique ◽  
Mode Control ◽  
Transient Disturbances ◽  
External Forces

Abstract This paper deals with the sliding mode control of a rigid rotor supported by radial magnetic bearings. First, the control law is developed to be robust to external forces caused by the rotor unbalance and transient disturbances. This control law is then discretized for its implementation on a digital computer. Three methods are presented to determine the required coil current for each magnet. Next, an analytical technique has been developed to calculate the steady state amplitudes of the digital closed-loop system. Lastly, results from this analytical technique and numerical simulations are presented for the rotor operating at 30,000 rpm.

Nonlinear dynamic analysis and sliding mode control for a gyroscope system

2010 ◽  
Vol 66 (1-2) ◽  
pp. 53-65 ◽  
Author(s):  
Cheng-Chi Wang ◽  
Her-Terng Yau
Keyword(s):  
Sliding Mode Control ◽  
Dynamic Analysis ◽  
Nonlinear Dynamic ◽  
Sliding Mode ◽  
Nonlinear Dynamic Analysis ◽  
Mode Control ◽  
Gyroscope System
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