Robust linear quadratic Gaussian control for flexible structures

Blelloch, Paul; Mingori, D. L.

doi:10.2514/3.20518

Cited by 10 publications

(3 citation statements)

References 13 publications

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“…III, experimental results have demonstrated the effectiveness of INDI-QP-V in GLA, MLA, and simultaneous GLA and MLA tasks. In the literature, the LQG control is one of the most popular methods for load alleviation [10,13,30,35]. Therefore, the proposed INDI-QP-V control will be compared with LQG control.…”

Section: Comparisons With Linear Quadratic Gaussian Controlmentioning

confidence: 99%

Seamless Active Morphing Wing Simultaneous Gust and Maneuver Load Alleviation

Wang

Mkhoyan

et al. 2021

Journal of Guidance, Control, and Dynamics

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This paper deals with the simultaneous gust and maneuver load alleviation problem of a seamless active morphing wing. The incremental nonlinear dynamic inversion with quadratic programming control allocation and virtual shape functions (denoted as INDI-QP-V) is proposed to fulfill this goal. The designed control allocator provides an optimal solution while satisfying actuator position constraints, rate constraints, and relative position constraints. Virtual shape functions ensure the smoothness of the morphing wing at every moment. In the presence of model uncertainties, external disturbances, and control allocation errors, the closed-loop stability is guaranteed in the Lyapunov sense. Wind tunnel tests demonstrate that INDI-QP-V can make the seamless wing morph actively to resist "1-cos" gusts and modify the spanwise lift distribution at the same time. The wing root shear force and bending moment have been alleviated by more than 44% despite unexpected actuator fault and nonlinear backlash. Moreover, during the experiment, all the input constraints were satisfied, the wing shape was smooth all the time, and the control law was executed in real time. Furthermore, as compared with the linear quadratic Gaussian control, the hardware implementation of INDI-QP-V is easier; the robust performance of INDI-QP-V is also superior.

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Section: Comparisons With Linear Quadratic Gaussian Controlmentioning

confidence: 99%

Seamless Active Morphing Wing Simultaneous Gust and Maneuver Load Alleviation

Wang

Mkhoyan

et al. 2021

Journal of Guidance, Control, and Dynamics

View full text Add to dashboard Cite

show abstract

“…III, experimental results have demonstrated the effectiveness of INDI-QP-V in GLA, MLA and simultaneous GLA and MLA tasks. In the literature, the Linear Quadratic Gaussian (LQG) control is one of the most popular methods for load alleviation [10,13,28,32]. Therefore, the proposed INDI-QP-V control will be compared to LQG control.…”

Section: Comparisons With Linear Quadratic Gaussian Controlmentioning

confidence: 99%

Seamless Active Morphing Wing Simultaneous Gust and Maneuver Load Alleviation

Wang

Mkhoyan

et al. 2020

Preprint

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This paper deals with the simultaneous gust and maneuver load alleviation problem of a seamless active morphing wing. The incremental nonlinear dynamic inversion with quadratic programming control allocation and virtual shape functions (denoted as INDI-QP-V) is proposed to fulfill this goal. The designed control allocator provides an optimal solution while satisfying actuator position constraints, rate constraints, and relative position constraints. Virtual shape functions ensure the smoothness of the morphing wing at every moment. In the presence of model uncertainties, external disturbances, and control allocation errors, the closed-loop stability is guaranteed in the Lyapunov sense. Wind tunnel tests demonstrate that INDI-QP-V can make the seamless wing morph actively to resist "1-cos" gusts and modify the spanwise lift distribution at the same time. The wing root shear force and bending moment have been alleviated by more than 44 % despite unexpected actuator fault and nonlinear backlash. Moreover, during the experiment, all the input constraints were satisfied, the wing shape was smooth all the time, and the control law was executed in real time. Furthermore, as compared to the linear quadratic Gaussian (LQG) control, the hardware implementation of INDI-QP-V is easier; the robust performance of INDI-QP-V is also superior.

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“…De-sensitizing techniques usually take an already proven unrobust method such as LQG and de-sensitize it to variations in parameters. For example, Blelloch and Mingori [80] modify the state and noise weighting matrices in the LQG compensator design to account for structured parametric uncertainty, thus reducing optimality. [81] add sensitivity states which penalize the variation of the performance objective with respect to parameter variations.…”

Section: Controller Synthesismentioning

confidence: 99%

Uncertainty modeling for structural control analysis and synthesis

Campbell

Crawley

1996

37th Structure, Structural Dynamics and Materials Conference

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First and foremost, I would like to express my sincere appreciation to Ed for his guidance and support both as my advisor and close friend. In the very unique environment of MIT, it has been very helpful to have your wholehearted support. I would also like to thank my doctoral committee for their help during my doctoral career, especially my advisor on the MACE project Dave Miller, who seemed to know when a jump start was needed. I would like to express my gratitude to the people of SERC and the MACE team, especially Simon and Roger for their technical and thoughtful discussions. And finally I would like to give a special thanks and dedication of this work to my family: Mom, Dad, Jen, Jeff, and the newest member, my best friend and love, Diana. Your support over the years has been unwavering, and it has allowed me to finish my PhD with some form of sanity still in tact. Thank you for being there every day.

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Robust linear quadratic Gaussian control for flexible structures

Cited by 10 publications

References 13 publications

Seamless Active Morphing Wing Simultaneous Gust and Maneuver Load Alleviation

Seamless Active Morphing Wing Simultaneous Gust and Maneuver Load Alleviation

Seamless Active Morphing Wing Simultaneous Gust and Maneuver Load Alleviation

Uncertainty modeling for structural control analysis and synthesis

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