scholarly journals Dynamic Coordinated Control Based on Sliding Mode Controller During Mode Switching With ICE Starting for an HEV

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 60428-60443 ◽  
Author(s):  
Aiyun Gao ◽  
Zhumu Fu ◽  
Fazhan Tao
Keyword(s):  
Sliding Mode ◽  
Coordinated Control ◽  
Mode Switching ◽  
Sliding Mode Controller

scholarly journals Consistent Total Traction Torque-Oriented Coordinated Control of Multimotors with Input Saturation for Heavy-Haul Locomotives

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Changfan Zhang ◽  
Qian Zhang ◽  
Jing He ◽  
Jianhua Liu ◽  
Xingxing Yang ◽  
...  
Keyword(s):  
Sliding Mode ◽  
Characteristic Curve ◽  
Input Saturation ◽  
Coordinated Control ◽  
Mode Switching ◽  
Control Input ◽  
Saturation Problem ◽  
Parameter Perturbations ◽  
Heavy Haul ◽  
Traction Characteristic

In the coordinated control of multiple motors for heavy-haul locomotives, the input value for a motor often exceeds its maximum allowable input value, resulting in the saturation problem. A traction total-amount coordinated tracking control (TACTC) strategy is proposed to address the input saturation of heavy-haul locomotives driven by multiple motors. This strategy reduces control input and suppresses input saturation. First, a multimotor traction model with uncertain parameter perturbations and external disturbances was established. Next, a sliding-mode disturbance observer (SMDO) was designed to reduce the sliding-mode switching gain, thereby decreasing the control input. An auxiliary anti-windup (AW) system was used to weaken the effect of input saturation on tracking performance. Then, the observed value and auxiliary state were fed back to the sliding-mode controller to design a TACTC protocol and ensure that the total amount of traction torque follows the desired traction characteristic curve. Finally, the Matlab/Simulink simulation and RT-Lab semiphysical experiment results show that the proposed strategy can effectively suppress the input saturation problem of multimotor coordinated control.

scholarly journals A Novel Sensorless Approach for Speed and Displacement Control of Bearingless Switched Reluctance Motor

2020 ◽  
Vol 10 (12) ◽  
pp. 4070
Author(s):  
Pulivarthi Nageswara Rao ◽  
Nallapaneni Manoj Kumar ◽  
Sanjeevikumar Padmanaban ◽  
M. S. P. Subathra ◽  
Aneesh A. Chand
Keyword(s):  
Sliding Mode ◽  
Tracking Error ◽  
Switched Reluctance Motor ◽  
Mode Switching ◽  
Stable Operation ◽  
Sliding Mode Controller ◽  
Switched Reluctance ◽  
Error Functions ◽  
Reluctance Motor ◽  
Dynamic Sliding Mode

The bearingless concept is a plausible alternative to the magnetic bearing drives. It provides numerous advantages like minimal maintenance, low cost, compactness and no requirement of high-performance power amplifiers. Controlling the rotor position and its displacements under parameter variations during acceleration and deceleration phases was not effective with the use of conventional controllers like proportional–integral–derivative (PID) and fuzzy-type controllers. Hence, to get the robust and stable operation of a bearingless switched reluctance motor (BSRM), a new robust dynamic sliding mode controller has been proposed in this paper, along with a sensorless operation using a sliding ode observer. The rotor displacement tracking error functions and speed tracking error functions are used in the designing of both proposed methods of the sliding mode switching functions. To get a healthy and stable operation of the BSRM, the proposed controller’s tasks are divided into three steps. As a first step, the displaced rotor in any one of the four quadrants in the air gap has to pull back to the centre position successfully. The second step is to run the motor at a rated speed by exciting torque phase currents, and finally, the third step is to maintain the stable and robust operation of the BSRM even under the application of different loads and changes of the motor parameters. Simulation studies were conducted and analysed under different testing conditions. The suspension forces, rotor displacements, are robust and stable, and the rotor is pulled back quickly to the centre position due to the proposed controller’s actions. The improved performance characteristics of the dynamic sliding mode controller (DSMC)-based sliding mode observer (SMO) was compared with the conventional sliding mode controller (SMC)-based SMO.

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