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Title: Lax-Oleinik-Type Formulas and Efficient Algorithms for Certain High-Dimensional Optimal Control Problems

Journal Article · · Communications on Applied Mathematics and Computation
 [1]; ORCiD logo [2];  [3]
  1. Brown University, Providence, RI (United States); Brown University
  2. Brown University, Providence, RI (United States)
  3. University of California, Los Angeles, CA (United States)

Two of the main challenges in optimal control are solving problems with state-dependent running costs and developing efficient numerical solvers that are computationally tractable in high dimension. In this paper, we provide analytical solutions to certain optimal control problems whose running cost depends on the state variable and with constraints on the control. We also provide Lax-Oleinik-type representation formulas for the corresponding Hamilton-Jacobi partial differential equations with state-dependent Hamiltonians. Additionally, we present an efficient, grid-free numerical solver based on our representation formulas, which is shown to scale linearly with the state dimension, and thus, to overcome the curse of dimensionality. Using existing optimization methods and the min-plus technique, we extend our numerical solvers to address more general classes of convex and nonconvex initial costs. We demonstrate the capabilities of our numerical solvers using implementations on a central processing unit (CPU) and a field-programmable gate array (FPGA). In several cases, our FPGA implementation obtains over a 10 times speedup compared to the CPU, which demonstrates the promising performance boosts FPGAs can achieve. Furthermore, our numerical results show that our solvers have the potential to serve as a building block for solving broader classes of high-dimensional optimal control problems in real-time.

Research Organization:
Brown University, Providence, RI (United States)
Sponsoring Organization:
USDOE Office of Science (SC); Air Force Office of Scientific Research (AFOSR)
Grant/Contract Number:
SC0023191
OSTI ID:
2441158
Journal Information:
Communications on Applied Mathematics and Computation, Journal Name: Communications on Applied Mathematics and Computation Journal Issue: 2 Vol. 6; ISSN 2096-6385
Publisher:
Springer NatureCopyright Statement
Country of Publication:
United States
Language:
English

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