Accession Number : ADP001091

Title :   Closed-Form Control Algorithm for Continuous-Time Disturbance-Utilizing Control Including Autopilot Lag,

Corporate Author : COMPUTER SCIENCES CORP HUNTSVILLE AL

Personal Author(s) : Bosley,Jerry ; Kendrick,Wayne

Report Date : OCT 1982

Pagination or Media Count : 8

Abstract : Missile dynamic time lag is a major factor contributing to excessive terminal miss distances resulting from short range intercept trajectories. The objective of this paper is to describe a linear closed loop guidance law which compensates for this lag. Disturbance-Utilizing Control (DUC) theory 1 is applied to the terminal homing missile intercept problem as described in 2 except that the plant model is extended to include the missile dynamics, represented as a single time lag. The final form of the guidance law is identical with the result of Cottrell 3, and extends the results of 5 which discusses the relations between DUC and some well known guidance laws. The results described in this paper are applicable to problems in which the external disturbances have waveform structure (e.g. target maneuvers or wind gusts). Further work is under way to derive controllers which can drive the missile to the target in the face of both waveform and noise-type disturbances. (Author)

Descriptors :   *Control theory, *Weapon systems, *Symposia, *Guided missile warheads, *Terminal homing, Intercept trajectories, Time lag theory, Miss distance, Closed loop systems, Automatic pilots

Distribution Statement : APPROVED FOR PUBLIC RELEASE