Inversed Model-Based Disturbance Observer Base on Adaptive Fast Convergent Sliding Mode Control and Fixed-Time State Observer for Slotless Self-Bearing Motor

Nguyen, Quang Dich; Giap, Van Nam; Huang, Shyh‐Chour

doi:10.3390/sym14061206

Cited by 10 publications

(5 citation statements)

References 35 publications

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“…The basic concept of LMI can be found in [1]. The proposed disturbance observer in this paper is based on the background of the inversed model-based in previous papers [32][33][34][35]. The proposed disturbance observer can overcome the illnesses of previous papers [36][37][38] with the requirement of the boundary of the rst derivative disturbance value.…”

Section: Introductionmentioning

confidence: 99%

An Optimal Homogenous Stability-Based Disturbance Observer and Sliding Mode Control for Secure Communication System

Nguyen

Pham²,

Thanh

et al. 2023

IEEE Access

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To prevent the loss of data or distortion of the real sent data in the secure communication, the disturbance and uncertainty rejection is very important technique. Especially, the secure communication of the chaotic system, where the master and slave systems are used to encrypt and decrypt the signal. These systems are should be a chaotic. The chaotic system is unpredictable and unstable. The security is obtained if the master and slave systems are synchronizing. Therefore, this paper proposes a new disturbance observer (DO) for estimating attacked signals on public channels and uncertain values of the secure communication system (SCS). First, a new condition of the reaching law was proposed via a homogenous stability condition, which was used to construct the disturbance observer and synchronization controller. Second, the proposed stability is applied to design a new DO for estimating the attacked signals on the public channels and the variations of the parameters of all master and slave systems (MSSs). Third, the MSSs were synchronized by the sliding mode control (SMC) with the same reaching law with the proposed DO. The calculations of controller and observer designs were based on the Takagi-Sugeno fuzzy (TSF) system, where the MSSs were taken into account as the fuzzy system. However, the TSF was used for calculation only. The original chaotic of MSSs were used to keep the characteristics of the chaos phenomenon. Final, the mathematically proven was provided to show the corrections of the proposed methods. To show the superior powers of the proposed method, the simulation of MATLAB software and experiment of local network via the internet router were used to conduct the logical analysis. The tested disturbances and uncertainties were mostly compensated by the proposed DO.

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Section: Introductionmentioning

confidence: 99%

An Optimal Homogenous Stability-Based Disturbance Observer and Sliding Mode Control for Secure Communication System

Nguyen

Pham²,

Thanh

et al. 2023

IEEE Access

Self Cite

View full text Add to dashboard Cite

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“…The applications of TSF in control systems can be found in [21], [22], [23], and [24]. The basic concept of DO in this paper is originally based on the concepts of observer in [25], [26], and [27]. The DO in this paper is no need the condition of disturbance source such as [28].…”

Section: Introductionmentioning

confidence: 99%

Disturbance Observer Based on Sliding Mode Control for Secure Communication of Chaotic Circuits

et al. 2023

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To prevent the distortion of the data transmission, the disturbance compensation method is highly required in the communication system. Therefore, the variations of parameters on both master and slave of secure communication and attacked signals all should be compensated to remain the sent data as its after decrypting. However, to reject these unwanted signals, the time varying disturbance rejection technique is requested. The time varying disturbance observer (DO) is able to reject both low and high frequency disturbances. Furthermore, the template of the sources of the disturbances are free. To meet the goal of robust control, first, the Liu chaotic system is used to represent the master and slave systems (MSSs). Second, the disturbance observer was proposed on the side of slave system together with the controller, which used to reject the parameters variations and disturbances on the public channels. Third, the sliding mode control was proposed to synchronize the slave and master systems. Final, the mathematical stability is provided based on the Lyapunov condition. Furthermore, to show the power and effectiveness of the given theory, the circuit realization was used to conduct the theoretical analysis. The sent and received messages were mostly identical, which is used to confirm that the proposed theory on the secure communication of chaotic circuits is good both in synchronization and disturbance rejection also.

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“…With the development of the control methods, many advanced control methods can be applied to the control system of the bearingless motor. By establishing the model inverse system, the dynamic decoupling performance of the suspension and rotation control of the bearingless motor can be effectively realized [14]. The internal model control (IMC) can be combined with the inverse system method to optimize the decoupling effect of the PID controller in the traditional inverse system control strategy [15].…”

Section: Introductionmentioning

confidence: 99%

Suspension Flux Internal Model Control of Single-Winding Bearingless Flux-Switching Permanent Magnet Motor

Chen,

Yu,

Yang

et al. 2023

Actuators

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A suspension flux internal model control method is proposed to address the problem of the strong coupling of a single-winding bearingless flux-switching permanent magnet motor leading to a significant ripple of the rotor radial displacement. Firstly, based on air-gap magnetic field modulation theory, the stator flux equation considering rotor dynamic eccentricity is established to reveal the relationship between the eccentric rotor and the magnetic field. Secondly, according to the dynamic characteristics of the motor and the variation law of the air-gap magnetic field, the suspension-plane flux is substituted into the rotor dynamic model, and the suspension flux-dynamics internal model and corresponding output are constructed, respectively. Finally, a complete control strategy is established, and the rotor is stably suspended by PWM control. The simulation and experimental results show that the proposed method has better steady-state and dynamic performance than traditional PID control, and the maximum radial displacement ripples of the rotor are reduced by 53% and 50% in steady-state and dynamic operation.

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Inversed Model-Based Disturbance Observer Base on Adaptive Fast Convergent Sliding Mode Control and Fixed-Time State Observer for Slotless Self-Bearing Motor

Cited by 10 publications

References 35 publications

An Optimal Homogenous Stability-Based Disturbance Observer and Sliding Mode Control for Secure Communication System

An Optimal Homogenous Stability-Based Disturbance Observer and Sliding Mode Control for Secure Communication System

Disturbance Observer Based on Sliding Mode Control for Secure Communication of Chaotic Circuits

Suspension Flux Internal Model Control of Single-Winding Bearingless Flux-Switching Permanent Magnet Motor

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