Energy-Efficient Incremental Control Allocation for Transition Flight via Quadratic Programming

Zhi-dong, LU; Li, Hangxu; He, Ruichen; Holzapfel, Florian

doi:10.1007/978-981-19-6613-2_478

Cited by 2 publications

(3 citation statements)

References 17 publications

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“…The incremental virtual control equals the error between commanded accelerations and estimated current accelerations from the Onboard Plant Model: Many algorithms have been designed for this purpose [12,30]. This paper adopts the simplest Moore-Penrose inverse method, considering control limits and rate limits.…”

Section: Incremental Nonlinear Dynamic Inversion Controllermentioning

confidence: 99%

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Multi-Phase Vertical Take-Off and Landing Trajectory Optimization with Feasible Initial Guesses

Lu,

Hong,

Holzapfel

2023

Aerospace

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The advancement of electric vertical take-off and landing (eVTOL) aircraft has expanded the horizon of urban air mobility. However, the challenge of generating precise vertical take-off and landing (VTOL) trajectories that comply with airworthiness requirements remains. This paper presents an approach for optimizing VTOL trajectories considering six degrees of freedom (6DOF) dynamics and operational constraints. Multi-phase optimal control problems are formulated to address specific constraints in various flight stages. The incremental nonlinear dynamic inversion (INDI) controller is employed to execute the flight mission in each phase. Controlled flight simulations yield dynamically feasible trajectories that serve as initial guesses for generating sub-optimal trajectories within individual phases. A feasible and sub-optimal initial guess for the holistic multi-phase problem is established by concatenating these single-phase trajectories. Focusing on a tilt-wing eVTOL aircraft, this paper computes VTOL trajectories leveraging the proposed initial guess generation procedure. These trajectories account for complex flight dynamics, align with various operation constraints, and minimize electric energy consumption.

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Section: Incremental Nonlinear Dynamic Inversion Controllermentioning

confidence: 99%

“…Chauhan et al [10] calculated the minimum energy take-off trajectory of a tilt-wing eVTOL using a 2DOF longitudinal model. Other similar studies also utilized simplified dynamic models [11,12]. Yet, only a handful of studies have undertaken trajectory optimization for VTOL aircraft based on 6DOF models [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Multi-Phase Vertical Take-Off and Landing Trajectory Optimization with Feasible Initial Guesses

Lu,

Hong,

Holzapfel

2023

Aerospace

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“…The effective integration of eVTOL aircraft into urban spaces necessitates advanced flight control systems (FCS), particularly in the actuation domain, that prioritize both safety and efficiency. This becomes especially vital when considering the intricacies involved in vertical takeoffs, in-flight stability, and landings in densely populated areas [4,5].…”

Section: Introductionmentioning

confidence: 99%

A Decentralized Voting and Monitoring Flight Control Actuation System for eVTOL Aircraft

He,

Holzapfel,

Bröcker

et al. 2024

Aerospace

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The emergence of eVTOL (electrical Vertical Takeoff and Landing) aircraft necessitates the development of safe and efficient systems to meet stringent certification and operational requirements. The primary state-of-the-art technology for flight control actuation in eVTOL aircraft is electro-mechanical actuators (EMAs), which heavily rely on multiple redundancies of critical components to achieve fault tolerance. However, challenges persist in terms of insufficient reliability, immaturity, and a lack of a measurable evaluation method. This research addresses these issues by elucidating the design requirements for EMAs in eVTOL aircraft and proposing a systematic design and evaluation approach for EMA architecture. A key enhancement involves the incorporation of decentralized voting and monitoring (VoDeMo) mechanisms within the Electronic Control Units (ECUs) to improve the overall safety of the EMA. The paper introduces an innovative triple-dual redundant architecture for aircraft control effectors, comprising three dissimilar lanes of ECUs and two similar redundant parallel channels of power electronics and motors. The design is synergistically supported by a comprehensive evaluation that incorporates quantifiable Model-Based Safety Assessment (MBSA), utilizing both physical simulation and logical safety models. Hardware-In-the-Loop (HIL) tests are conducted on a constructed prototype to validate the proposed architecture.

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Energy-Efficient Incremental Control Allocation for Transition Flight via Quadratic Programming

Cited by 2 publications

References 17 publications

Multi-Phase Vertical Take-Off and Landing Trajectory Optimization with Feasible Initial Guesses

Multi-Phase Vertical Take-Off and Landing Trajectory Optimization with Feasible Initial Guesses

A Decentralized Voting and Monitoring Flight Control Actuation System for eVTOL Aircraft

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