A New Pole-Placement Method for Excitation Control Design to Damp SSR of a Nonidentical Two-Machine System

This paper presents a nonlinear cascaded control design that has been developed to (1) improve the self-sensing speed control performance of an interior permanent magnet synchronous motor (IPMSM) drive by reducing its speed and torque ripples and its phase current harmonic distortion and (2) attain the maximum torque while utilizing the minimum drive current. The nonlinear cascaded control system consists of two nonlinear controls for the speed and current control loop. A fuzzy logic controller (FLC) is employed for the outer speed control loop to regulate the rotor shaft speed. Model predictive current control (MPCC) is utilized for the inner current control loop to regulate the drive phase currents. The nonlinear equation for the dq reference current is derived to implement the maximum torque per armature (MTPA) control to achieve the maximum torque while using the minimum current values. The model reference adaptive system (MRAS) was employed for the speed self-sensing mechanism. The self-sensing speed control performance of the IPMSM motor drive was compared with that of the traditional cascaded control schemes. The stability of the sensorless mechanism was studied using the pole placement method. The proposed nonlinear cascaded control was verified based on the simulation results. The robustness of the control design was ensured under various loads and in a wide speed range. The dynamic performance of the motor drive is improved while circumventing the need to tune the proportional-integral (PI) controller. The self-sensing speed control performance of the IPMSM drive was enhanced significantly by the designed cascaded control model.

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Control of Pole-Climbing Robot Orientation using Self-Tuning Method

International Journal of Power Electronics and Drive Systems (IJPEDS) ◽

10.11591/ijpeds.v9.i3.pp1029-1037 ◽

2018 ◽

Vol 9 (3) ◽

pp. 1029

Author(s):

Muhammad Aziz Muslim ◽

Goegoes Dwi Nusantoro ◽

Rini Nur Hasanah ◽

Mokhammad Hasyim Asy’ari

Keyword(s):

Pole Placement ◽

Original Position ◽

Main Task ◽

Climbing Robot ◽

Positive Direction ◽

Rotary Encoder ◽

Tuning Method ◽

Placement Method ◽

Angle Change ◽

Self Tuning

This paper describes the method to control a hybrid robot whose main task is to climb a pole to place an object on the top of the pole. The hybrid pole-climbing robot considered in this paper uses 2 Planetary PG36 DC-motors as actuators and an external rotary encoder sensor to provide a feedback on the change in robot orientation during the climbing movement. The orientation control of the pole-climbing robot using self-tuning method has been realized by identifying the transfer function of the actuator system under consideration, being followed with the calculation of control parameters using the self-tuning pole-placement method, and furthermore being implemented on the external rotary encoder sensor. Self-tuning pole-placement method has been explored to control the parameters q0, q1, q2, and p1 of the controller. The experiments were done on a movement path in a form of a cylindrical pole. The first experiment was done based one the change in rotation angle of the rotary sensor with the angle values greater than 50˚ in the positive direction, whereas the second experiment was done with the angle values greater than -50˚ in the negative direction. The experiment results show that the control of the robot under consideration could maintain its original position at the time of angle change disturbance and that the robot could climb in a straight direction within the specified tolerance of orientation angle change.

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The usage of Lambert W function for identification and speed control of a DC motor

Facta universitatis - series Electronics and Energetics ◽

10.2298/fuee1904581g ◽

2019 ◽

Vol 32 (4) ◽

pp. 581-600

Author(s):

Radmila Gerov ◽

Zoran Jovanovic

Keyword(s):

Closed Loop ◽

Dc Motor ◽

Pole Placement ◽

Step Response ◽

Lambert W Function ◽

Placement Method ◽

Speed Regulation ◽

Measured Speed ◽

Proportional Controller ◽

Integral Gain

The paper proposes a new method of identifying the linear model of a DC motor. The parameter estimation is based on the closed-loop step response of the DC motor under a proportional controller. For the application of the method, a deliberate delay of the measured speed was introduced. The paper considers the speed regulation of the direct current motor with negligible inductance by applying 1-DOF and 2-DOF, proportional integral retarded controllers. The proportional and integral gain of the PI retarded controllers was received by using a pole placement method on the identified model. The Lambert W function was applied for the identification and in designing the controller with the purpose of finding the rightmost poles of the closed-loop as well as the boundary conditions for selecting the gain of the PI controller. The robustness of the calculated controllers was considered under the effect of an disturbance, uncertainty in each of the DC motor parameters as well as perturbations in time delay.

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Control design for time-delay systems based on quasi-direct pole placement

Journal of Process Control ◽

10.1016/j.jprocont.2009.11.004 ◽

2010 ◽

Vol 20 (3) ◽

pp. 337-343 ◽

Cited By ~ 44

Author(s):

Wim Michiels ◽

Tomáš Vyhlídal ◽

Pavel Zítek

Keyword(s):

Time Delay ◽

Control Design ◽

Pole Placement ◽

Delay Systems ◽

Time Delay Systems

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H∞Excitation Control Design for Stochastic Power Systems with Input Delay Based on Nonlinear Hamiltonian System Theory

Mathematical Problems in Engineering ◽

10.1155/2015/947815 ◽

2015 ◽

Vol 2015 ◽

pp. 1-12 ◽

Cited By ~ 3

Author(s):

Weiwei Sun ◽

Lianghong Peng ◽

Ying Zhang ◽

Huaidan Jia

Keyword(s):

System Theory ◽

Time Delay ◽

Hamiltonian System ◽

Power Systems ◽

Control Design ◽

Area Measurement ◽

Random Fluctuation ◽

Control Law ◽

Excitation Control ◽

Nonlinear Hamiltonian System

This paper presentsH∞excitation control design problem for power systems with input time delay and disturbances by using nonlinear Hamiltonian system theory. The impact of time delays introduced by remote signal transmission and processing in wide-area measurement system (WAMS) is well considered. Meanwhile, the systems under investigation are disturbed by random fluctuation. First, under prefeedback technique, the power systems are described as a nonlinear Hamiltonian system. Then theH∞excitation controller of generators connected to distant power systems with time delay and stochasticity is designed. Based on Lyapunov functional method, some sufficient conditions are proposed to guarantee the rationality and validity of the proposed control law. The closed-loop systems under the control law are asymptotically stable in mean square independent of the time delay. And we through a simulation of a two-machine power system prove the effectiveness of the results proposed in this paper.

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FEEDBACK SYNCHRONIZATION USING POLE-PLACEMENT CONTROL

International Journal of Bifurcation and Chaos ◽

10.1142/s0218127400001675 ◽

2000 ◽

Vol 10 (11) ◽

pp. 2611-2617 ◽

Cited By ~ 2

Author(s):

ROBERTO TONELLI ◽

YING-CHENG LAI ◽

CELSO GREBOGI

Keyword(s):

Chaotic Systems ◽

Pole Placement ◽

Active Area ◽

High Dimensions ◽

Mutual Synchronization ◽

Numerical Examples ◽

Placement Method ◽

Pole Placement Control

Synchronization in chaotic systems has become an active area of research since the pioneering work of Pecora and Carroll. Most existing works, however, rely on a passive approach: A coupling between chaotic systems is necessary for their mutual synchronization. We describe here a feedback approach for synchronizing chaotic systems that is applicable in high dimensions. We show how two chaotic systems can be synchronized by applying small feedback perturbations to one of them. We detail our strategy to design the control based on the pole-placement method, and give numerical examples.

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