In this work,the problem of designing a robust control algor ithm for a DC-DC buck power converter is investigated.The applied solution is based on a recenly proposed eror-based version of the active disturbance rejec...In this work,the problem of designing a robust control algor ithm for a DC-DC buck power converter is investigated.The applied solution is based on a recenly proposed eror-based version of the active disturbance rejection control(ADRC)scheme,in which the unknown higher-order lerms of the reference signal are treated as additional components of the system"total disturbance".The motivation here is to provide a prac tical following of a reference voltage trajectory for the buck converler in specific cases where neither the analytical form of the desired signal nor its future values are known a priori,hence cannot be directly used for control synthesis.In this work.the application of the error-based ADRC results in a prac-tically appealing control technique,with compact struc ture.simplified control rule,and intwitive tuning(inherited from the conventional output-based ADRC scheme).Theoretical.numerical,and experimental results are shown to validate the efficacy of the error-based ADRC in buck converter control,followed by a discussion about the revealed theoretical and practical limitations of this approach.展开更多
The paper addresses the problem of reconciling the modern control paradigm developed by R. Kalman in the sixties of the past century, and the centenary error-based design of the proportional, integrative and derivati...The paper addresses the problem of reconciling the modern control paradigm developed by R. Kalman in the sixties of the past century, and the centenary error-based design of the proportional, integrative and derivative （PID） controllers. This is done with the help of the error loop whose stability is proved to be necessary and sufficient for the close-loop plant stability. The error loop is built by cascading the uncertain plant-to-model discrepancies （causal, parametric, initial state, neglected dynamics）, which are driven by the design model output and by arbitrary bounded signals, with the control unit transfer functions. The embedded model control takes advantage of the error loop and its equations to design appropriate algorithms of the modern control theory （state predictor, control law, reference generator）, which guarantee the error loop stability and performance. A simulated multivariate case study shows modeling and control design steps and the coherence of the predicted and simulated performance.展开更多
Electro-optical tracking systems have been widely used in the cutting-edge domains of free space environment detection and communication owing to their exceptional performance.However,external disturbances often signi...Electro-optical tracking systems have been widely used in the cutting-edge domains of free space environment detection and communication owing to their exceptional performance.However,external disturbances often significantly impact the working accuracy of these systems.As their scope of application continues to broaden,increasingly complex operating conditions introduce more intricate environments and disturbances.This paper introduces a composite control structure of an enhanced error-based observer,rooted in the repetitive control strategy,tailored for two types of complex disturbances:periodic harmonic disturbance and narrow-band peak periodic disturbance.This structure not only ensures the system's stability,but also suppresses periodic disturbances across multiple frequencies,effectively addressing the challenge that current disturbance suppression methods face in mitigating complex periodic disturbances.Moreover,necessary proofs are provided and an experimental platform is established for the electro-optical system,demonstrating the efficacy and reliability of the proposed control methods under various conditions.展开更多
Structural vibrations in Tip-Tilt modes usually affect the closed-loop performance of astronomically optical telescopes.In this paper,the state of art control methods—proportional integral(PI)control,linear quadratic...Structural vibrations in Tip-Tilt modes usually affect the closed-loop performance of astronomically optical telescopes.In this paper,the state of art control methods—proportional integral(PI)control,linear quadratic Gaussian(LQG)control,disturbance feed forward(DFF)control,and disturbance observer control(DOBC)of Tip-Tilt mirror to reject vibrations are first reviewed,and then compared systematically and comprehensively.Some mathematical transformations allow PI,LQG,DFF,and DOBC to be described in a uniform framework of sensitivity function that expresses their advantages and disadvantages.In essence,feed forward control based-inverse model is the main idea of current techniques,which is dependent on accuracies of models in terms of Tip-Tilt mirror and vibrations.DOBC can relax dependences on accuracy model,and therefore this survey concentrates on concise tutorials of this method with clear descriptions of their features in the control area of disturbance rejections.Its applications in various conditions are reviewed with emphasis on the effectiveness.Finally,the open problems,challenges and research prospects of DOBC of Tip-Tilt mirror are discussed.展开更多
In this work,we investigate two specific linear ADRC structures,namely output-and error-based.The former is considered a“standard”version of ADRC,a title obtained primarily thanks to its simplicity and effectiveness...In this work,we investigate two specific linear ADRC structures,namely output-and error-based.The former is considered a“standard”version of ADRC,a title obtained primarily thanks to its simplicity and effectiveness,which have spurred its adoption across multiple industries.The latter is found to be especially appealing to practitioners as its feedback error-driven structure bares similarities to conventional control solutions,like PI and PID.In this paper,we describe newly found connections between the two considered ADRC structures,which allowed us to formally establish conditions for their equivalence.Furthermore,the conducted comprehensive performance comparison between output-and error-based ADRCs has facilitated the identification of specific modules within them,which can now be conveniently used as building blocks,thus aiding the control designers in customizing ADRC-based solutions and making them most suitable for their applications.展开更多
基金This work was supported by the Fundamental Research Funds for the Central Universities(No.21620335).
文摘In this work,the problem of designing a robust control algor ithm for a DC-DC buck power converter is investigated.The applied solution is based on a recenly proposed eror-based version of the active disturbance rejection control(ADRC)scheme,in which the unknown higher-order lerms of the reference signal are treated as additional components of the system"total disturbance".The motivation here is to provide a prac tical following of a reference voltage trajectory for the buck converler in specific cases where neither the analytical form of the desired signal nor its future values are known a priori,hence cannot be directly used for control synthesis.In this work.the application of the error-based ADRC results in a prac-tically appealing control technique,with compact struc ture.simplified control rule,and intwitive tuning(inherited from the conventional output-based ADRC scheme).Theoretical.numerical,and experimental results are shown to validate the efficacy of the error-based ADRC in buck converter control,followed by a discussion about the revealed theoretical and practical limitations of this approach.
文摘The paper addresses the problem of reconciling the modern control paradigm developed by R. Kalman in the sixties of the past century, and the centenary error-based design of the proportional, integrative and derivative （PID） controllers. This is done with the help of the error loop whose stability is proved to be necessary and sufficient for the close-loop plant stability. The error loop is built by cascading the uncertain plant-to-model discrepancies （causal, parametric, initial state, neglected dynamics）, which are driven by the design model output and by arbitrary bounded signals, with the control unit transfer functions. The embedded model control takes advantage of the error loop and its equations to design appropriate algorithms of the modern control theory （state predictor, control law, reference generator）, which guarantee the error loop stability and performance. A simulated multivariate case study shows modeling and control design steps and the coherence of the predicted and simulated performance.
文摘Electro-optical tracking systems have been widely used in the cutting-edge domains of free space environment detection and communication owing to their exceptional performance.However,external disturbances often significantly impact the working accuracy of these systems.As their scope of application continues to broaden,increasingly complex operating conditions introduce more intricate environments and disturbances.This paper introduces a composite control structure of an enhanced error-based observer,rooted in the repetitive control strategy,tailored for two types of complex disturbances:periodic harmonic disturbance and narrow-band peak periodic disturbance.This structure not only ensures the system's stability,but also suppresses periodic disturbances across multiple frequencies,effectively addressing the challenge that current disturbance suppression methods face in mitigating complex periodic disturbances.Moreover,necessary proofs are provided and an experimental platform is established for the electro-optical system,demonstrating the efficacy and reliability of the proposed control methods under various conditions.
文摘Structural vibrations in Tip-Tilt modes usually affect the closed-loop performance of astronomically optical telescopes.In this paper,the state of art control methods—proportional integral(PI)control,linear quadratic Gaussian(LQG)control,disturbance feed forward(DFF)control,and disturbance observer control(DOBC)of Tip-Tilt mirror to reject vibrations are first reviewed,and then compared systematically and comprehensively.Some mathematical transformations allow PI,LQG,DFF,and DOBC to be described in a uniform framework of sensitivity function that expresses their advantages and disadvantages.In essence,feed forward control based-inverse model is the main idea of current techniques,which is dependent on accuracies of models in terms of Tip-Tilt mirror and vibrations.DOBC can relax dependences on accuracy model,and therefore this survey concentrates on concise tutorials of this method with clear descriptions of their features in the control area of disturbance rejections.Its applications in various conditions are reviewed with emphasis on the effectiveness.Finally,the open problems,challenges and research prospects of DOBC of Tip-Tilt mirror are discussed.
基金The work of Dr.R.Madonski was supported by the Fundamental Research Funds for the Central Universities(Project No.21620335)The work of Dr.M.Stankovic was supported by the International Foreign Expert Project Fund of Jinan University(Project No.G2021199027L,coordinator:Dr.Hui Deng).
文摘In this work,we investigate two specific linear ADRC structures,namely output-and error-based.The former is considered a“standard”version of ADRC,a title obtained primarily thanks to its simplicity and effectiveness,which have spurred its adoption across multiple industries.The latter is found to be especially appealing to practitioners as its feedback error-driven structure bares similarities to conventional control solutions,like PI and PID.In this paper,we describe newly found connections between the two considered ADRC structures,which allowed us to formally establish conditions for their equivalence.Furthermore,the conducted comprehensive performance comparison between output-and error-based ADRCs has facilitated the identification of specific modules within them,which can now be conveniently used as building blocks,thus aiding the control designers in customizing ADRC-based solutions and making them most suitable for their applications.
