Accession Number : AD0827381

Title :   CANCELLATION PULSES TO SUPPRESS LIGHTLY DAMPED SYSTEMS,

Corporate Author : NAVAL ORDNANCE TEST STATION CHINA LAKE CA

Personal Author(s) : Tuman, C.

Report Date : JUN 1967

Pagination or Media Count : 42

Abstract : Servomechanisms with lightly damped resonant elements are difficult to stabilize, using the continuous-error signal of conventional theory. The use of sampled data error signals simplifies this problem, when the 'posicast' method of driving the system is applied. The posicast method is one in which the drive force is applied in two increments; the second force cancels the oscillations generated by the first force, which results in a constant output free of any oscillations. This paper proves that the application of drive forces according to the posicast method, in a general nth order lightly damped system, will result in a constant output free of any oscillations. The number of increments of force required to produce such performance may be as great as 2n. (Author)

Descriptors :   (*SERVOMECHANISMS, STABILIZATION), THEORY, DAMPING, OSCILLATION, CONTROL, FORCE(MECHANICS), ACCELERATION, RESONANCE, THESES, SAMPLING, INTEGRAL TRANSFORMS.

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE