Optimering av slutfasstyrning

• Main Author: Persson, Mathias
• Format: Others
• Language: Swedish
• Published: Linköpings universitet, Institutionen för systemteknik 2002
• Subjects: Reglerteknik; slutfasstyrning; optimering; proportional navigation; referensbana; bangenerering; missilstyrning; reglerteknik; Automatic control
• Online Access: http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-1416

Modern missiles must meet higher and higher demands. They should be autonomous, have long range and still have a big effect on the target. To maximize effect on target some missiles not only minimize miss distance, but also try to hit with a certain angle; often perpendicular to the surface of the target. In this thesis a method to guide the missile in the terminal phase of its mission where both point of impact as angle of impact are specified. The method consist of two parts. First a reference trajectory with best possible impact conditions, considering the performance of the missile, is computed. The second part consist of a guidance law which guide the missile along the reference trajectory to the target. Two laws were tested, Biased Proportional Navigation (BPN) and Modified Biased Proportional Navigation (MBPN). The method was implemented in an existing detailed simulation system. A big number of simulations were done to optimize the algorithms, and to evaluate performance. Performance was then compared to an already existing method for terminal guidance. The new method was better in terms of angle of impact but worse considering point of impact. One big advantage with the new method is that after calculation of the reference trajectory but before the actual flight (to target) it is possible to predict, with a high level of certainty, if the missile is going to hit the target or not.