A Model-Based Unmatched Disturbance Rejection Control Approach for Speed Regulation of a Converter-Driven DC Motor Using Output-Feedback

Abstract

The speed regulation problem with only speed measurement is investigated in this paper for a permanent magnet direct current (DC) motor driven by a buck converter. By lumping all unknown matched/unmatched disturbances and uncertainties together, the traditional active disturbance rejection control (ADRC) approach provides an intuitive solution for the problem under consideration. However, for such a higher-order disturbed system, the increase of poles for the extended state observer (ESO) therein will lead to drastically growth of observer gains, which causes severe noise amplification. This paper aims to propose a new model-based disturbance rejection controller for the converter-driven DC motor system using output-feedback. Instead of estimating lumped disturbances directly, a new observer is constructed to estimate the desired steady state of control signal as well as errors between the real states and their desired steadystate responses. Thereafter, a controller with only speed measurement is proposed by utilizing the estimates. The performance of the proposed method is tested through experiments on dSPACE. It is further shown via numerical calculations and experimental results that the poles of the observer within the proposed control approach can be largely increased without significantly increasing magnitude of the observer gains.

Invariant manifold based nonsingular terminal sliding mode control for systems with multi-source disturbances via output-feedback

“…The following theorem shows the main result of this paper. Theorem 1: For multi-source disturbance nonlinear system (1), under Assumption 1, if the nonsingular TSM controller is designed as (11) with the sliding manifold (10), where the estimations are obtained from the observer given by ( 8), then the output voltage v 0 of the motor can reach the reference signal v ref in a finite time.…”

“…Sliding mode control (SMC) has been widely used in many control systems because of the advantages of good robustness, fast response, adaptability to nonlinear systems, and low model requirements [1][2][3][4][5]. However, in the actual system, such as spacecraft system [6,7], DC-DC converter system [8][9][10] and so on, there will be mismatched disturbances. People usually choose full state measurement to achieve various control methods, but due to the cost and installation limitations, it is difficult to achieve in reality.…”

Robust Flatness-Based Tracking Control for a “Full-Bridge Buck Inverter–DC Motor” System

“…Meanwhile, Sira-Ramírez and Oliver-Salazar in [5] studied the concepts of active disturbance rejection control and differential flatness in two combinations of the Buck converter with DC motors. Moreover, in recent years, several active disturbance rejection control schemes have been developed for governing Buck converter-driven motor systems, e.g., [6][7][8][9][10][11], while the study of controls based on differential flatness enabling solving the trajectory tracking task have been proposed in [12][13][14]. On the other hand, the applications of zero average dynamics of fixed point induction control techniques to control the speed of a permanent magnet DC motor with a Buck converter were detailed by Hoyos et al, in [15][16][17][18].…”

Extended electrical equivalent circuit for modelling compound DC motors

“…Ene et al (2021) presented a smart solar photovoltaic DC grid powered separately excited DC motor. Zhang et al (2022) investigated speed regulation problem for a permanent magnet DC motor. Silva-Ortigoza et al (2023) designed a tracking control for the angular speed of the DC/DC boost converter-fed DC motor.…”

“…In the existing studies (Osman et al , 2022; Mach et al , 2012; Tapia et al , 2014; Sweidan et al , 2020; Soressi, 2012; Ene et al , 2021; Zhang et al , 2022; Silva-Ortigoza et al , 2023; Villarreal-Cervantes et al , 2021; Wang et al , 2021; Silva-Ortigoza et al , 2021), only the electrical equivalent circuit including the armature and excitation circuit is given for the DC motor model. The mechanical part required to complete the machine model is expressed only with mechanical equations.…”