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An actuator system to control multiple surfaces in a morphing wing
Linköping University, Department of Management and Engineering, Fluid and Mechatronic Systems. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0001-5644-803X
Linköping University, Department of Management and Engineering, Fluid and Mechatronic Systems. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0001-5892-6410
Linköping University, Department of Management and Engineering, Fluid and Mechatronic Systems. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0002-7480-1922
Linköping University, Department of Management and Engineering, Fluid and Mechatronic Systems. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0002-2315-0680
2023 (English)Conference paper, Published paper (Other academic)
Abstract [en]

New technologies and innovations to reduce carbon dioxide emissions in the aeronautics industry are essential. The morphing wing concept is an excellent method to increase aircraft performance and reduce fuel consumption and may now become re-applied using a new actuation technology. Nevertheless, for the moment, several showstoppers inhibit the commercial introduction of morphing systems. A morphing wing design's structural skeleton, actuator and sensor network are characterized by an extensive and multi-branched network of actuators and sensors and many mechanical and electrical components that reduce reliability, availability, flight safety and maintainability. It also dramatically impacts weight, volume, complexity and costs. Therefore, less complex and more robust solutions are desired for the morphing wing technology to become a realistic alternative for the aeronautics industry.  Future morphing wing systems in aircraft can be improved significantly by utilizing a new type of hydraulic linear actuator invention, the Hydraulic Infinite Linear Actuator with Multiple Rods (HILA MR). A single HILA MR actuator has the potential to replace the whole actuator and sensor network in a morphing wing, enabling substantial rationalization in several ways and facilitating certification and commercial introduction.  Furthermore, compared to conventional actuating technologies, a HILA MR architecture allows for controlling the morphing structure using reduced mass and volume, enabling a power consumption reduction. With HILA MR, the mechanical actuation of the control surfaces may be embedded into the aircraft's fuselage in a bio-mimicking fashion similar to the human hand, where the muscles that control the fingers of the hand are located in the forearm. Light Dyneema fibre cables with high tensile strength are used to distribute actuator motions in the fuselage to the control surface, similar to how they are used in cable robots. In addition, the location of the actuator facilitates a slender wing design.  The HILA MR technology enables a novel way to generate and distribute linear mechanical movement for flight control and wing morphing. It mimics the characteristics of hydraulic servo cylinders, but the piston actuates several multiple rods in a switching fashion, using clamping elements. The HILA technology acts according to a timing-controlled shifting of operating modes between continuous and discrete incremental actuator positioning steps. Each rod actuates one part of the wings morphing mechanical structure. The application of this technology in aviation is also characterized by the following: a reduced number of servo valves, well-known clamping technology used for both stepping and locking functionality, a reduced number of position feedback sensors and a local hydraulic system in the fuselage or situated in the wing box with a small oil reservoir volume.  This paper aims to evaluate different aspects and design issues of the HILA MR system in a morphing wing application (actuator, sensor, control system and structural skeleton) and compare the technology against present electromechanical solutions. In addition, a simplified morphing wing system simulation model based on HILA MR is presented. Results from initial simulations show that the concept is attainable and will have the required response timings. 

Place, publisher, year, edition, pages
2023. p. 8-
National Category
Mechanical Engineering
Identifiers
URN: urn:nbn:se:liu:diva-211643OAI: oai:DiVA.org:liu-211643DiVA, id: diva2:1936931
Conference
Recent Advances in Aerospace Actuation Systems and Components, September 25-27, 2023, Toulouse, France
Available from: 2025-02-12 Created: 2025-02-12 Last updated: 2025-02-26

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Landberg, MagnusSethson, MagnusBraun, RobertKrus, Petter

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