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NASA NTRS · 20220009734

Parameterized Differential Dynamic Programming RSS Presentation

Alex Oshin·Matthew D. Houghton·Michael J. Acheson·Irene M. Gregory·Evangelos A. Theodorou
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Differential Dynamic ProgrammingParameterized Differential Dynamic ProgrammingUrban Air Mobility Vehicles

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Alex Oshin, Matthew D. Houghton, Michael J. Acheson, Irene M. Gregory, Evangelos A. Theodorou. Parameterized Differential Dynamic Programming RSS Presentation. https://ntrs.nasa.gov/citations/20220009734

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Path Planning: Differential Dynamic Programming and Model Predictive Path Integral Control on VTOL Aircraft

This paper explores two optimal control approaches, widely used in robotics, to establish their viability as real-time trajectory planners for vehicle configurations envisioned for the emerging aviation sector of Urban Air Mobility (UAM). Differential Dynamic Programming (DDP) enables planning over highly nonlinear dynamics using second-order approximations along a nominal trajectory, and displays quadratic convergence to a local solution. Model Predictive Path Integral (MPPI) is a stochastic sampling-based algorithm that can optimize for general cost criteria, including potentially highly nonlinear formulations, and supports parallel computation through the use of modern GPU hardware. In this work, DDP and MPPI were implemented using model predictive control (MPC), and the results indicate they are able to successfully transition the aircraft over different flight envelopes and generate trajectories unique to UAM vehicles.

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