Asymptotically stable adaptive load torque observer for precision position control of BLDC motor

1998 ◽  
Vol 145 (4) ◽  
pp. 383 ◽  
Author(s):  
J.S. Ko
Keyword(s):  
Position Control ◽  
Asymptotically Stable ◽  
Bldc Motor ◽  
Load Torque ◽  
Torque Observer ◽  
Load Torque Observer

scholarly journals Nonlinear Position Control Using Differential Flatness Concept with Load Torque Observer for Electro Hydraulic Actuators with Sinusoidal Load Torque

Mathematics ◽  
2020 ◽  
Vol 8 (9) ◽  
pp. 1484
Author(s):  
Sangmin Suh ◽  
Wonhee Kim
Keyword(s):  
Position Control ◽  
Differential Flatness ◽  
Load Torque ◽  
Outer Loop ◽  
Load Pressure ◽  
Hydraulic Actuators ◽  
Position Controller ◽  
Sinusoidal Load ◽  
Torque Observer ◽  
Load Torque Observer

We propose a nonlinear position control using a differential flatness concept with a load torque observer to compensate for the sinusoidal load torque in electro-hydraulic actuators (EHAs) EHAs. In an EHA with a rotational joint, the load torque is a sinusoidal disturbance, whose magnitude can be estimated via a load torque observer. In the proposed load torque observer, the load torque can be estimated without requiring its maximum frequency to be known. The position controller tracks position and comprises an inner-loop load pressure controller and an outer-loop position controller. The former tracks the desired pressure via near input–output linearization. The desired pressure is developed using the differential flatness of the mechanical system in the EHA. The feedback plus feedforward outer-loop position controller is designed to track the desired position and to compensate for the load torque. The stability of the closed-loop system is mathematically proven using the input-to-state stability property.

MRAC load torque observer for position control of a brushless DC motor

1996 ◽  
Vol 80 (2) ◽  
pp. 201-209 ◽  
Author(s):  
JONG SUN KO ◽  
YOUNG SEOK JUNG ◽  
MYUNG JOONG YOUN
Keyword(s):  
Position Control ◽  
Dc Motor ◽  
Brushless Dc Motor ◽  
Load Torque ◽  
Brushless Dc ◽  
Torque Observer ◽  
Load Torque Observer
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