Speed Tracking and Synchronization of a Dual-Motor System via Second Order Sliding Mode Control

Abstract

Dual-motor systems have been widely used in industrial applications, and speed synchronization of the motors can always be deteriorated by system parameter uncertainties and load torque perturbations. In this paper, a new robust control strategy for the dual-motor systems is developed by incorporating second order sliding mode control (2-SMC) techniques. The strategy is to design chatting-free control laws to stabilize speed tracking of each motor while synchronizing their velocity. In the proposed scheme, firstly, speed controller for a single motor is designed to eliminate the effects of system parameter variations and load torque perturbations. Secondly, a cross-coupled architecture based synchronous controller is designed to reduce speed error of the motors caused by characteristic inconsistency and unbalanced load torque. Stability of the closed loop system is analyzed by Lyapunov theory; it is proven that both speed tracking errors and synchronous error can converge to zero. Finally, experiments are performed to examine the effectiveness of the developed controllers. Experimental results will show the good performance of the proposed control scheme.

A New Synchronization Technique of a Three-Phase Grid Tied Inverter for Photovoltaic Applications

“…The Phase Lock Loop (PLL) is a control system designed to generate the reference output signals related to the input signals for each phase. There are different types of PLL methods in the world of electronic and communication system [1][2][3][4][5][6][7][16][17][18][19][20][21][22][23][24][25][26]. These PLL control systems are designed according to variable frequency and signal phase detector in feedback signals loop, PLL filtering technique, and PLL prefiltering technique.…”

“…The purpose of a synchronization method is to generate the reference signal for a pulse width modulation (PWM). There are many synchronization methods to synchronize to the reference signal of three-phase inverter connected to grid [2][3][4][5], like PLL using a local oscillator comparison and sine wave tables [6,7]. This paper focuses on using a new synchronization method to set up the three-phase reference signals of measuring current depending on line-to line or phase voltage of grid without a phase or frequency generation.…”

Speed Synchronous Control of Multiple Permanent Magnet Synchronous Motors Based on an Improved Cross-Coupling Structure

“…With the development of modern industry, the synchronous control of multi-motors has been widely used in robotics, electric vehicles, steel rolling, papermaking, and other fields [1][2][3][4][5][6][7][8]. Shortening the start-up time and improving the synchronization performance of multi-motors are of both theoretical and practical significance for enhancing the control accuracy and stability of the system [9][10][11][12][13][14][15].…”

Optimal Design and Hybrid Control for the Electro-Hydraulic Dual-Shaking Table System

“…[12][13][14]. Recently, SMC has attracted much attention due to strong robustness, fast dynamic response and simplicity of design and implementation [15][16][17]. The SMC is introduced to the synchronization control of multiple robotic manipulators in [15].…”

“…The SMC is introduced to the synchronization control of multiple robotic manipulators in [15]. Chen [16] developed a robust control strategy for the dual-motor system by incorporating a second order SMC. In [17], a sliding mode synchronization controller was designed for the fixture clamp equipment.…”