Systematic design methods of robust and structured controllers for satellites

Falcoz, Alexandre; Pittet, Christelle; Bennani, Samir; Guignard, Anne; Bayart, Cedric; Frapard, B.

doi:10.1007/s12567-015-0099-8

Cited by 25 publications

(25 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These filters are designed in order to limit the undesired effects of the off diagonal elements, thus resulting in a less conservative solution. Typos on how to tune these weighting functions can be found in [8].…”

Section: Fig3 Closed Loop Interconnected Structure Of the μ-Synthesmentioning

confidence: 99%

“…The main idea for obtaining a solution with reduced order is to approximate the μ-function by its upper bounds which remains an optimally scaled maximum singular value: (7) where is the set of scaling matrices commuting with and belonging to the set (8) Thus the minimization problem in (5) is reformulated into (9) which can be solved using procedures from [9].…”

Section: Fig4 Closed Loop Interconnected Design For the Generalizedmentioning

confidence: 99%

“…The aim of this paper is to present a reduced order H ∞ design based on structured μ-Synthesis developed in [8] for the Heading Hold (HH) autopilot of the flying wing configuration Hirrus UAV. This UAV was designed and manufactured by a private Romanian company in collaboration with academics from Faculty of Aerospace Engineering of University "Politehnica" of Bucharest.…”

Section: Introductionmentioning

confidence: 99%

“…The third section provides some insight on the structured μ-Synthesis controllers, but more details can be found in [8]. Simulation results, for the Hirrus UAV, that include atmosphere turbulences are provided in section four as a comparison between three controllers: the full eight-order controller and its truncated fifth-order version obtained in [7] and the structured μ-Synthesis controller which is only second-order.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Autopilot Design Dor the Lateral-Directional Motion of an Uav

Ene¹,

Stoica²,

Parvu³

2017

AFASES 2017

View full text Add to dashboard Cite

Section: Fig3 Closed Loop Interconnected Structure Of the μ-Synthesmentioning

confidence: 99%

Section: Fig4 Closed Loop Interconnected Design For the Generalizedmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Autopilot Design Dor the Lateral-Directional Motion of an Uav

Ene¹,

Stoica²,

Parvu³

2017

AFASES 2017

View full text Add to dashboard Cite

“…This is because small planetary bodies are typically characterised by highly irregular and poorly known shapes, which render their physical environment extremely uncertain and variable. Moreover, due to the interplanetary distances involved, fully autonomous guidance and control algorithms are required to cope with communication delays and spacecraft subsystem degradation, as demonstrated by the European Rosetta mission …”

Section: Introductionmentioning

confidence: 99%

Synthesis and analysis of robust control compensators for Space descent & landing

Simplicio

Marcos

Joffre

et al. 2018

Intl J Robust & Nonlinear

View full text Add to dashboard Cite

Summary In this article, a complete modelling, synthesis, and analysis methodology of control compensators for descent and landing (D&L) on small planetary bodies is presented. These missions are scientifically very rewarding but technically extremely challenging due to the complex and poorly known environment around those bodies, which calls for the ability to manage competing robustness and performance requirements. While this issue is typically addressed via the redefinition of D&L guidance strategies, here, it is tackled through the augmentation with a simple yet robust control compensator. This compensator is designed using linear fractional transformation modelling to capture the interplay with uncertain gravity fields and the recently developed structured H∞ optimisation framework, which has been proved particularly suitable for industry‐oriented applications. The proposed approach is completely generic but uses the scenario of a landing on the Martian moon Phobos as an illustrative example. Different compensators are then verified and compared analytically via the structured singular value μ and through high‐fidelity Monte Carlo simulation.

show abstract

Legacy recovery and robust augmentation structured design for the VEGA launcher

Navarro-Tapia

Marcos

Simplicio

et al. 2019

Intl J Robust & Nonlinear

View full text Add to dashboard Cite

This paper presents a systematic robust control framework based on the structured  ∞ approach to address the synthesis of the atmospheric ascent-flight control system of a launch vehicle. To introduce this synthesis framework, the control problem is first formulated to recover the classically designed baseline rigid-body controller of the actual VEGA launcher VV05 mission. This legacy recovery builds the necessary background for a good understanding of the problem and increases confidence for its transfer to the Space industry. Subsequently, it is shown how to systematically augment the robustness of the design from the synthesis stage against wind turbulence perturbations and parametric uncertainty. The resulting controller is verified via classical stability margins and robust structured singular value analyses and finally validated using nonlinear, time-domain simulations in a Monte Carlo campaign. It is highlighted that this robust synthesis framework allows to obtain a controller with improved robust stability and global performance, and more importantly, it provides a more systematic methodology for design. 3364NAVARRO-TAPIA ET AL. approach in the last decade, resulting already in relevant Space-flown missions, 4,5 piloted flight tests, 6 and launch vehicle control design. [7][8][9][10] This synthesis approach allows to perform a methodological control tuning for a specified controller structure. Therefore, the design can be tailored to the current VEGA TVC architecture. This is quite important since this framework can be used then as a benchmark to explore the room for improvement with respect to the baseline controller. Furthermore, the structured  ∞ offers more design capabilities than classical techniques. These improvements include a direct trade-off between robustness and performance, reduction in tuning effort and cost prior to each mission flight, and the capability to directly include system uncertainties in the design.This paper continues the work of Simplício et al, 11 where a launcher uncertainty modeling and a systematic analysis of the VEGA baseline controller were presented. As a follow-up, the aim here is to provide a detailed understanding of how the launch vehicle control system design is formulated as a robust control framework and how this enables to augment the capabilities of the design. First, to increase confidence by the industry and facilitate the transfer of this technique, the structured  ∞ synthesis is used to recover the legacy behavior of the baseline controller (which was designed using a classical design approach). Note that this is not a simple reverse engineering of the baseline controller; rather, recovery is performed based on the analytical understanding of the launcher problem and systematic design weight tuning. The importance of this recovery is that an optimization-based approach is shown to recover exactly the baseline gains without using that information to initialize the control problem. Then, the level of complexity of the design interconnection is gradually ...

show abstract

Systematic design methods of robust and structured controllers for satellites

Cited by 25 publications

References 10 publications

Autopilot Design Dor the Lateral-Directional Motion of an Uav

Autopilot Design Dor the Lateral-Directional Motion of an Uav

Synthesis and analysis of robust control compensators for Space descent & landing

Legacy recovery and robust augmentation structured design for the VEGA launcher

Contact Info

Product

Resources

About