Accession Number : ADA190435

Title :   Advanced Guidance Algorithms for Homing Missiles with Bearings-Only Measurements.

Descriptive Note : Final technical rept.,

Corporate Author : TEXAS UNIV AT AUSTIN DEPT OF AEROSPACE ENGINEERING AND ENGINEERING MECHANICS

Personal Author(s) : Speyer, Jason L ; Hull, David G

PDF Url : ADA190435

Report Date : Nov 1987

Pagination or Media Count : 87

Abstract : Homing missile guidance is formulated as an optimal stochastic control problem where the special nonlinear structure of the missile-target engagement is exploited. Since this stochastic control problem assumes a nested information pattern, the filter structure can be developed independently of the guidance scheme. However, the guidance scheme is dependent on and affects filter performance. Significant progress is being made on both the estimation problem and the guidance problem. Investigation of the nonlinear estimators especially tailored to the homing missile problem has produced not only a good deal of insight but responsive and mechanizable schemes. Although these schemes are applicable to active sensors, our emphasis has been on the more difficult passive sensor case where only angles are available. Recently-developed schemes based on coordinate transformations and on a assumed probability density function perform well, but the modified-gain extended Kalman filter has been used as the basis of a stochastic adaptive flight control scheme. Two important current efforts in missile guidance with bearings-only information are in development of the guidance schemes that enhance an information measure by trajectory modulation and in target acceleration detection.

Descriptors :   *HOMING, ACCELERATION, ALGORITHMS, ANGLES, COORDINATES, DETECTORS, ESTIMATES, FILTERS, GUIDANCE, GUIDED MISSILES, HOMING DEVICES, MODULATION, NONLINEAR SYSTEMS, OPTIMIZATION, PASSIVE SYSTEMS, PATTERNS, PROBABILITY DENSITY FUNCTIONS, PROBLEM SOLVING, STOCHASTIC CONTROL, TARGET DETECTION, GUIDED MISSILE TRAJECTORIES, TRANSFORMATIONS(MATHEMATICS), BEARING(DIRECTION), GUIDED MISSILE TARGETS, KALMAN FILTERING, TARGET ANGLE, ADAPTIVE CONTROL SYSTEMS

Subject Categories : Air Navigation and Guidance
      Guided Missile Traj, Accuracy and Ballistics

Distribution Statement : APPROVED FOR PUBLIC RELEASE