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Keliang Zhou - One of the best experts on this subject based on the ideXlab platform.

  • Universal Fractional-Order Design of Linear Phase Lead Compensation Multirate Repetitive Control for PWM Inverters
    IEEE Transactions on Industrial Electronics, 2017
    Co-Authors: Zhichao Liu, Bin Zhang, Keliang Zhou
    Abstract:

    Repetitive control (RC) with linear Phase Lead compensation provides a simple but very effective control solution for any periodic signal with a known period. Multirate repetitive control (MRC) with a downsampling rate can reduce the need of memory size and computational cost, and then Leads to a more feasible design of the plug-in RC systems in practical applications. However, with fixed sampling rate, both MRC and its linear Phase Lead compensator are sensitive to the ratio of the sampling frequency to the frequency of interested periodic signals: 1) MRC might fails to exactly compensate the periodic signal in the case of a fractional ratio; 2) linear Phase Lead compensation might fail to enable MRC to achieve satisfactory performance in the case of a low ratio. In this paper, a universal fractional-order design of linear Phase Lead compensation MRC is proposed to tackle periodic signals with high accuracy, fast dynamic response, good robustness, and cost-effective implementation regardless of the frequency ratio, which offers a unified framework for housing various RC schemes in extensive engineering application. An application example of programmable ac power supply is explored to comprehensively testify the effectiveness of the proposed control scheme.

  • Fractional-order Phase Lead compensation for multi-rate repetitive control on three-Phase PWM DC/AC inverter
    2016 IEEE Applied Power Electronics Conference and Exposition (APEC), 2016
    Co-Authors: Zhichao Liu, Bin Zhang, Keliang Zhou
    Abstract:

    For constant voltage constant frequency pulse-width modulation (PWM) inverter system, repetitive control (RC) can achieve zero steady-state tracking error for any periodic signal. Multi-rate repetitive control (MRC), which is featured by a fast system sampling rate and a reduced RC rate, is able to lower CPU computation load while achieving low tracking error and fast convergence speed. To accurately compensate the Phase lag of MRC, this paper proposes a fractional-order Phase Lead compensation solution to further improve the tracking performance. Implemented with a Lagrange polynomial, the fractional-order Phase Lead compensator has more accurate and flexible Phase Lead compensation than traditional Phase Lead compensator. Experimental results are provided to show the effectiveness of the proposed fractional-order Phase Lead compensation.

  • Performance improvement of repetitive controlled PWM inverters: A Phase-Lead compensation solution
    International Journal of Circuit Theory and Applications, 2008
    Co-Authors: Bin Zhang, Keliang Zhou, Yigang Wang, Danwei Wang
    Abstract:

    The compensation of the Phase lag plays an important role in the improvement of convergence rate, tracking accuracy, and robustness of repetitive controller. However, it is often difficult to compensate the system Phase lag exactly due to variation of the load and unknown disturbances. An alternative way is to provide a simple but effective Phase compensation to compensate the Phase lag in a frequency band that contains the major tracking error components. With this motivation, a repetitive control scheme with a linear Phase-Lead compensator is proposed and applied to the control of constant-voltage constant-frequency pulse-width modulated DC–AC inverters. Detailed analysis of Phase compensation on system stability is provided, and conditions for the design of Phase compensation are derived. The experimental results under different loads and load changes show that the proposed scheme can achieve high tracking accuracy, low total harmonic distortion, and fast dynamic response. Copyright © 2008 John Wiley & Sons, Ltd.

  • linear Phase Lead compensation repetitive control of a cvcf pwm inverter
    IEEE Transactions on Industrial Electronics, 2008
    Co-Authors: Bin Zhang, Keliang Zhou, Danwei Wang, Yigang Wang
    Abstract:

    This paper presents a simple and efficient linear Phase Lead compensation repetitive control scheme for engineers to develop high-performance power converter systems. The linear Phase Lead compensation helps a repetitive controller to achieve faster convergence rate, higher tracking accuracy, and wider stability region. In the proposed scheme, the Phase Lead compensation repetitive controller is plugged into generic state-feedback-controlled converter systems. Its comprehensive synthesis, which involves principle, analysis, design, modeling, implementation, and experiments, is systematically and completely presented in great detail. A complete series of experiments is successfully carried out to verify the solution.

  • high performance repetitive control of pwm dc ac converters with real time Phase Lead fir filter
    IEEE Transactions on Circuits and Systems Ii-express Briefs, 2006
    Co-Authors: Keliang Zhou, Danwei Wang, Bin Zhang, Jingcheng Wang
    Abstract:

    The significance of Phase-Lead compensation is revealed for repetitive control systems in terms of tracking accuracy and transient. A real-time noncausal Phase-Lead FIR filter is proposed to improve the performance of add-on repetitive controlled constant-voltage constant-frequency PWM dc-ac converters. The experiment results show that nearly perfect tracking, low total harmonics distortion, and satisfactory transient are achieved in the proposed repetitive-controlled PWM converter under both linear load and rectifier load

Danwei Wang - One of the best experts on this subject based on the ideXlab platform.

  • Performance improvement of repetitive controlled PWM inverters: A Phase-Lead compensation solution
    International Journal of Circuit Theory and Applications, 2008
    Co-Authors: Bin Zhang, Keliang Zhou, Yigang Wang, Danwei Wang
    Abstract:

    The compensation of the Phase lag plays an important role in the improvement of convergence rate, tracking accuracy, and robustness of repetitive controller. However, it is often difficult to compensate the system Phase lag exactly due to variation of the load and unknown disturbances. An alternative way is to provide a simple but effective Phase compensation to compensate the Phase lag in a frequency band that contains the major tracking error components. With this motivation, a repetitive control scheme with a linear Phase-Lead compensator is proposed and applied to the control of constant-voltage constant-frequency pulse-width modulated DC–AC inverters. Detailed analysis of Phase compensation on system stability is provided, and conditions for the design of Phase compensation are derived. The experimental results under different loads and load changes show that the proposed scheme can achieve high tracking accuracy, low total harmonic distortion, and fast dynamic response. Copyright © 2008 John Wiley & Sons, Ltd.

  • linear Phase Lead compensation repetitive control of a cvcf pwm inverter
    IEEE Transactions on Industrial Electronics, 2008
    Co-Authors: Bin Zhang, Keliang Zhou, Danwei Wang, Yigang Wang
    Abstract:

    This paper presents a simple and efficient linear Phase Lead compensation repetitive control scheme for engineers to develop high-performance power converter systems. The linear Phase Lead compensation helps a repetitive controller to achieve faster convergence rate, higher tracking accuracy, and wider stability region. In the proposed scheme, the Phase Lead compensation repetitive controller is plugged into generic state-feedback-controlled converter systems. Its comprehensive synthesis, which involves principle, analysis, design, modeling, implementation, and experiments, is systematically and completely presented in great detail. A complete series of experiments is successfully carried out to verify the solution.

  • high performance repetitive control of pwm dc ac converters with real time Phase Lead fir filter
    IEEE Transactions on Circuits and Systems Ii-express Briefs, 2006
    Co-Authors: Keliang Zhou, Danwei Wang, Bin Zhang, Jingcheng Wang
    Abstract:

    The significance of Phase-Lead compensation is revealed for repetitive control systems in terms of tracking accuracy and transient. A real-time noncausal Phase-Lead FIR filter is proposed to improve the performance of add-on repetitive controlled constant-voltage constant-frequency PWM dc-ac converters. The experiment results show that nearly perfect tracking, low total harmonics distortion, and satisfactory transient are achieved in the proposed repetitive-controlled PWM converter under both linear load and rectifier load

  • Robust repetitive control with linear Phase Lead
    2006 American Control Conference, 2006
    Co-Authors: Yigang Wang, Bin Zhang, Danwei Wang, Keliang Zhou
    Abstract:

    In this paper, the robustness stability and performance of robust repetitive control scheme is analyzed and synthesized by the structured singular value theory. A linear Phase Lead is introduced to improve the performance of robust repetitive control system. It compensates the Phase lag of feedback control system and widens the cutoff frequency of Q filter. The periodic disturbance rejection performance of system is improved. Experiment results of a PWM converter system are presented to demonstrate the efficiency of the proposed approach.

  • Odd-harmonic repetitive controlled CVCF PWM inverter with Phase Lead compensation
    Conference Record of the 2004 IEEE Industry Applications Conference 2004. 39th IAS Annual Meeting., 2004
    Co-Authors: Keliang Zhou, Danwei Wang, Yong-qiang Ye
    Abstract:

    In this paper, an odd-harmonic repetitive control scheme with Phase Lead compensation is proposed for CVCF PWM converters. The proposed repetitive controller that combines an odd-harmonic periodic generator with a poles-zeros-cancellation Phase Lead filter occupies less data memory that a conventional repetitive controller does. And it offers faster monotonic convergence of the tracking error; and yields nearly exact tracking accuracy (very low THD and tracking error RMS). Analysis and design of such an odd-harmonic repetitive control system are completely discussed. Simulation results of a single-Phase PWM inverter with proposed repetitive controller are illustrated to validate the proposed approach.

K P Louganski - One of the best experts on this subject based on the ideXlab platform.

  • current Phase Lead compensation in single Phase pfc boost converters with a reduced switching frequency to line frequency ratio
    IEEE Transactions on Power Electronics, 2007
    Co-Authors: K P Louganski
    Abstract:

    Traditional design of the current loop controller in a single-Phase power factor correction boost converter is not suitable for applications with higher line frequencies (up to 800 Hz) because of the zero-crossing distortion and high harmonic content due to the current Phase Lead effect. Increasing the control bandwidth and switching frequency in order to avoid this effect would reduce converter efficiency and is objectionable. The paper presents the Leading-Phase admittance cancellation (LPAC) technique, which improves the current-shaping control structure and eliminates the current Phase Lead without increasing the bandwidth requirement. The LPAC method extends the allowable line frequency range from 1/150 to 1/5 of the current loop bandwidth. The LPAC method is load-invariant and superior to other previously proposed methods. The LPAC network can be added to existing designs, which would require only two passive components in the simplest case

  • current Phase Lead compensation in single Phase pfc boost converters with a reduced switching frequency to line frequency ratio
    Applied Power Electronics Conference, 2006
    Co-Authors: K P Louganski
    Abstract:

    Traditional design of the current loop controller in a single-Phase PFC boost converter is not suitable for applications with higher line frequencies (up to 800 Hz) because of the zero-crossing distortion and high harmonic content due to the current Phase Lead effect. Increasing the control bandwidth and switching frequency in order to avoid this effect would reduce converter efficiency and is objectionable. The paper presents the Leading-Phase admittance cancellation (LPAC) technique, which improves the current-shaping control structure and eliminates the current Phase Lead without increasing the bandwidth requirement. The LPAC method extends the allowable line frequency range from 1/150 to 1/5 of the current loop bandwidth. The LPAC method is load-invariant and superior to other previously proposed methods. The LPAC network can be added to existing designs, which would require only two passive components in the simplest case.

Bin Zhang - One of the best experts on this subject based on the ideXlab platform.

  • Universal Fractional-Order Design of Linear Phase Lead Compensation Multirate Repetitive Control for PWM Inverters
    IEEE Transactions on Industrial Electronics, 2017
    Co-Authors: Zhichao Liu, Bin Zhang, Keliang Zhou
    Abstract:

    Repetitive control (RC) with linear Phase Lead compensation provides a simple but very effective control solution for any periodic signal with a known period. Multirate repetitive control (MRC) with a downsampling rate can reduce the need of memory size and computational cost, and then Leads to a more feasible design of the plug-in RC systems in practical applications. However, with fixed sampling rate, both MRC and its linear Phase Lead compensator are sensitive to the ratio of the sampling frequency to the frequency of interested periodic signals: 1) MRC might fails to exactly compensate the periodic signal in the case of a fractional ratio; 2) linear Phase Lead compensation might fail to enable MRC to achieve satisfactory performance in the case of a low ratio. In this paper, a universal fractional-order design of linear Phase Lead compensation MRC is proposed to tackle periodic signals with high accuracy, fast dynamic response, good robustness, and cost-effective implementation regardless of the frequency ratio, which offers a unified framework for housing various RC schemes in extensive engineering application. An application example of programmable ac power supply is explored to comprehensively testify the effectiveness of the proposed control scheme.

  • Fractional-order Phase Lead compensation for multi-rate repetitive control on three-Phase PWM DC/AC inverter
    2016 IEEE Applied Power Electronics Conference and Exposition (APEC), 2016
    Co-Authors: Zhichao Liu, Bin Zhang, Keliang Zhou
    Abstract:

    For constant voltage constant frequency pulse-width modulation (PWM) inverter system, repetitive control (RC) can achieve zero steady-state tracking error for any periodic signal. Multi-rate repetitive control (MRC), which is featured by a fast system sampling rate and a reduced RC rate, is able to lower CPU computation load while achieving low tracking error and fast convergence speed. To accurately compensate the Phase lag of MRC, this paper proposes a fractional-order Phase Lead compensation solution to further improve the tracking performance. Implemented with a Lagrange polynomial, the fractional-order Phase Lead compensator has more accurate and flexible Phase Lead compensation than traditional Phase Lead compensator. Experimental results are provided to show the effectiveness of the proposed fractional-order Phase Lead compensation.

  • Performance improvement of repetitive controlled PWM inverters: A Phase-Lead compensation solution
    International Journal of Circuit Theory and Applications, 2008
    Co-Authors: Bin Zhang, Keliang Zhou, Yigang Wang, Danwei Wang
    Abstract:

    The compensation of the Phase lag plays an important role in the improvement of convergence rate, tracking accuracy, and robustness of repetitive controller. However, it is often difficult to compensate the system Phase lag exactly due to variation of the load and unknown disturbances. An alternative way is to provide a simple but effective Phase compensation to compensate the Phase lag in a frequency band that contains the major tracking error components. With this motivation, a repetitive control scheme with a linear Phase-Lead compensator is proposed and applied to the control of constant-voltage constant-frequency pulse-width modulated DC–AC inverters. Detailed analysis of Phase compensation on system stability is provided, and conditions for the design of Phase compensation are derived. The experimental results under different loads and load changes show that the proposed scheme can achieve high tracking accuracy, low total harmonic distortion, and fast dynamic response. Copyright © 2008 John Wiley & Sons, Ltd.

  • linear Phase Lead compensation repetitive control of a cvcf pwm inverter
    IEEE Transactions on Industrial Electronics, 2008
    Co-Authors: Bin Zhang, Keliang Zhou, Danwei Wang, Yigang Wang
    Abstract:

    This paper presents a simple and efficient linear Phase Lead compensation repetitive control scheme for engineers to develop high-performance power converter systems. The linear Phase Lead compensation helps a repetitive controller to achieve faster convergence rate, higher tracking accuracy, and wider stability region. In the proposed scheme, the Phase Lead compensation repetitive controller is plugged into generic state-feedback-controlled converter systems. Its comprehensive synthesis, which involves principle, analysis, design, modeling, implementation, and experiments, is systematically and completely presented in great detail. A complete series of experiments is successfully carried out to verify the solution.

  • high performance repetitive control of pwm dc ac converters with real time Phase Lead fir filter
    IEEE Transactions on Circuits and Systems Ii-express Briefs, 2006
    Co-Authors: Keliang Zhou, Danwei Wang, Bin Zhang, Jingcheng Wang
    Abstract:

    The significance of Phase-Lead compensation is revealed for repetitive control systems in terms of tracking accuracy and transient. A real-time noncausal Phase-Lead FIR filter is proposed to improve the performance of add-on repetitive controlled constant-voltage constant-frequency PWM dc-ac converters. The experiment results show that nearly perfect tracking, low total harmonics distortion, and satisfactory transient are achieved in the proposed repetitive-controlled PWM converter under both linear load and rectifier load

Youyi Wang - One of the best experts on this subject based on the ideXlab platform.

  • Robust track‐following control of hard disk drives using improved integral sliding mode combined with Phase Lead peak filter
    International Journal of Adaptive Control and Signal Processing, 2008
    Co-Authors: Lihua Xie, Youyi Wang
    Abstract:

    An integral-type sliding mode control (SMC) scheme with application to track-following control in hard disk drives (HDDs) is investigated in this paper. With the proposed technique, the dynamics of the sliding mode is analytically obtained without any reaching Phase by using the integral sliding surface. To reconstruct estimates of the system states for use in a full information SMC law, an asymptotic observer is also employed and the fulfillment of sliding condition, including the case when estimated states are used, is also verified. In addition, the proposed control scheme integrated with a Phase Lead peak filter (PLPF) is also investigated for better rejection of disturbance of narrow-band type at mid-frequency ranges. Simulation studies on the design of a track-following controller in HDDs are conducted to illustrate its feasibility and effectiveness. The simulation results also demonstrate that the proposed scheme provides better performance than the conventional sliding mode and proportional–integral–derivative control methods. Copyright © 2007 John Wiley & Sons, Ltd.

  • ICARCV - Phase Lead Reset Control Design with an Application to HDD Servo Systems
    2006 9th International Conference on Control Automation Robotics and Vision, 2006
    Co-Authors: Guoxiao Guo, Youyi Wang
    Abstract:

    This paper investigates a time-dependent Phase Lead reset control (PLRC) scheme which resets the sub-set of states of the systems at a predefined time. A Phase Lead reset compensator that has a flat gain characteristic is proposed to be used together with the common feedback control design to enlarge the servo bandwidth by increasing the Phase stability margin. We also propose to have a reset time slightly earlier than the instants of input zero-crossing in the usual reset control to solve the impulsive effect in the control signal that Leads to control signal saturation. Sinusoidal describing function analysis of the proposed control scheme shows that it can relax the Bode's gain-Phase constraint. The application of the proposed PLRC to the Hard Disk Drive (HDD) servo system shows that the performance improvement. Our results also show that the large sharp peaks in the control voltage which may Lead to track following controller saturation is also avoided.

  • Phase Lead peak filter method to high TPI servo track writer with microactuators
    2006 American Control Conference, 2006
    Co-Authors: Jinchuan Zheng, Guoxiao Guo, Youyi Wang, Jingliang Zhang, Branislav Hredzak
    Abstract:

    A servo track writing (STW) platform with dual piezoelectric (PZT) microactuator is proposed for higher track density hard disk drives (HDDs). We mainly deal with the servo control issues to achieve high track density. Vibration and noise analysis based on the measured position error signal (PES) indicates that the PES is significantly disturbed by narrow-band vibrations. Hence, we propose a general second-order Phase Lead peak filter (PLPF) that is applicable to reject narrow-band disturbances at all frequency ranges. The filter zero is designed to minimally degrade the closed-loop system stability and obtain a smooth sensitivity curve around the disturbance frequency. A feedback controller is employed to stabilize the servo loop and then a PLPF is embedded to further suppress the specific vibrations. The readback position errors are evaluated and 6.4 nm 3/spl sigma/ value of the true PES NRRO is achieved, corresponding to 395k track-per-inch (TPI) track density.