Accession Number : AD0751813

Title :   On a Brachistochrone of Victorr Erma,

Corporate Author : RAND CORP SANTA MONICA CALIF

Personal Author(s) : Saunders,Kenneth V.

Report Date : JUL 1972

Pagination or Media Count : 20

Abstract : The following variation of a classical brachistochrone is considered: the particle must start and end at the same elevation with horizontal velocities, and must never fly-off the curve of its own inertia. First, it is shown that the problem can be reduced to that of finding brachistochrones that start horizontally and go to a specified vertical line, the corresponding particles constrained to never fly-off of their own inertia. This problem is then formulated as an optimal control problem with a state-dependent inequality constraint on the control. It is then shown that, strictly speaking, the problem has no solution but that interesting local extrema can be found. Graphs of these extrema are given and the resulting times are compared with those for the corresponding classical brachistochrone. (Author)

Descriptors :   (*CALCULUS OF VARIATIONS, PARTICLE TRAJECTORIES), CONTROL SYSTEMS, GRAVITY, FALLING BODIES, INERTIA, PARTIAL DIFFERENTIAL EQUATIONS, NUMERICAL INTEGRATION

Subject Categories : Numerical Mathematics
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE