Guidance and Control Systepi Research for Improved ,terminal M a Operations*

Severa l guidance and c o n t r o l system re sea rch and development a c t i v i t i e s aimed a t improving t h e ope ra t iona l c a p a b i l i t i e s of commercial a i r c r a f t i n t h e te rmina l area are descr ibed . The guidance and c o n t r o l systems have been designed t o improve t h e capac i ty and e f f i c i e n c y of te rmina l area opera t ions , enhance t h e approach and landing c a p a b i l i t y of a i r c r a f t i n adverse weather condi t ions , and reduce t h e impac t of a i r c r a f t n o i s e perceived on t h e ground. S p e c i f i c performance f e a t u r e s inc lude t h e a b i l i t y t o cap tu re and t r a c k s t e e p g l ides lopes , use s h o r t f i n a l approaches, perform f l a r e s wi th reduced longi tud i n a l touchdown d i spe r s ion and execute h igh speed runway r o l l o u t and t u r n o f f . Resul t s obtained from s imula t ion s t u d i e s o r f l i g h t tests are shown f o r each of t h e algori thms.