57,206 research outputs found
Forward Stochastic Reachability Analysis for Uncontrolled Linear Systems using Fourier Transforms
We propose a scalable method for forward stochastic reachability analysis for
uncontrolled linear systems with affine disturbance. Our method uses Fourier
transforms to efficiently compute the forward stochastic reach probability
measure (density) and the forward stochastic reach set. This method is
applicable to systems with bounded or unbounded disturbance sets. We also
examine the convexity properties of the forward stochastic reach set and its
probability density. Motivated by the problem of a robot attempting to capture
a stochastically moving, non-adversarial target, we demonstrate our method on
two simple examples. Where traditional approaches provide approximations, our
method provides exact analytical expressions for the densities and probability
of capture.Comment: V3: HSCC 2017 (camera-ready copy), DOI updated, minor changes | V2:
Review comments included | V1: 10 pages, 12 figure
Algorithmic Verification of Continuous and Hybrid Systems
We provide a tutorial introduction to reachability computation, a class of
computational techniques that exports verification technology toward continuous
and hybrid systems. For open under-determined systems, this technique can
sometimes replace an infinite number of simulations.Comment: In Proceedings INFINITY 2013, arXiv:1402.661
A Primal-Dual Method for Optimal Control and Trajectory Generation in High-Dimensional Systems
Presented is a method for efficient computation of the Hamilton-Jacobi (HJ)
equation for time-optimal control problems using the generalized Hopf formula.
Typically, numerical methods to solve the HJ equation rely on a discrete grid
of the solution space and exhibit exponential scaling with dimension. The
generalized Hopf formula avoids the use of grids and numerical gradients by
formulating an unconstrained convex optimization problem. The solution at each
point is completely independent, and allows a massively parallel implementation
if solutions at multiple points are desired. This work presents a primal-dual
method for efficient numeric solution and presents how the resulting optimal
trajectory can be generated directly from the solution of the Hopf formula,
without further optimization. Examples presented have execution times on the
order of milliseconds and experiments show computation scales approximately
polynomial in dimension with very small high-order coefficients.Comment: Updated references and funding sources. To appear in the proceedings
of the 2018 IEEE Conference on Control Technology and Application
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