Title
Hamilton-Jacobi Deep Q-Learning for Deterministic Continuous-Time Systems with Lipschitz Continuous Controls
Abstract
In this paper, we propose Q-learning algorithms for continuous-time deterministic optimal control problems with Lipschitz continuous controls. A new class of Hamilton-Jacobi- Bellman (HJB) equations is derived from applying the dynamic programming principle to continuous-time Q-functions. Our method is based on a novel semi-discrete version of the HJB equation, which is proposed to design a Q-learning algorithm that uses data collected in discrete time without discretizing or approximating the system dynamics. We identify the conditions under which the Q-function estimated by this algorithm converges to the optimal Q-function. For practical implementation, we propose the Hamilton-Jacobi DQN, which extends the idea of deep Q-networks (DQN) to our continuous control setting. This approach does not require actor networks or numerical solutions to optimization problems for greedy actions since the HJB equation provides a simple characterization of optimal controls via ordinary differential equations. We empirically demonstrate the performance of our method through benchmark tasks and high-dimensional linear-quadratic problems.
Year
DOI
Venue
2021
v22/20-1235.html
JOURNAL OF MACHINE LEARNING RESEARCH
Keywords
DocType
Volume
Q-learning, Deep Q-networks, Continuous-time dynamical systems, Optimal control, Hamilton-Jacobi-Bellman equations
Journal
22
Issue
ISSN
Citations 
1
1532-4435
0
PageRank 
References 
Authors
0.34
0
3
Name
Order
Citations
PageRank
Jeongho Kim100.34
Jaeuk Shin200.34
Insoon Yang3359.17