Structured H-infinity Control Design for the VEGA Vehicle: Recovery of the Legacy Control Behaviour

Diego Navarro-Tapia, Andres Marcos, Samir Bennani, Christophe Roux

Research output: Contribution to conferenceConference Paperpeer-review

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This article addresses the design of the atmospheric ascent-flight control system of a launch vehicle using the structured H-infinity synthesis technique. The main goal is to provide a methodological robust control design framework and transfer it to industry. This article presents the first step towards this transfer, which consists of: first, providing guidelines to tune the weighting functions based directly on physical effects of the launch vehicle and system requirements; and second, to demonstrate that a baseline, classically-design controller can be recovered with this design framework. The latter is very important for an industrial transfer as it establishes a common point of reference. The system is used based on the actual VEGA VV05 mission data, and classical VEGA TVC structure. These data and structure are then used together with H-infinity metrics to guide the structured H-infinity design to recover the same controllers as the baseline along different design points. Finally, the fixed-order H-infinity controllers are gain-scheduled and validated using a non-linear high-fidelity simulator, which shows the perfect performance and robust recovery.
Original languageEnglish
Number of pages17
Publication statusPublished - 22 Sept 2017
EventInternational ESA conference on guidance, navigation & control systems - Salzburg, Austria
Duration: 29 May 20172 Jun 2017
Conference number: 10th


ConferenceInternational ESA conference on guidance, navigation & control systems
Abbreviated titleGNC 2017


  • robust control
  • Structured H-infinity synthesis


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