Method and apparatus for an aircraft inner loop elevator control system

US4419732A · kind A · utility

Assignee

• The Boeing Company · US

Inventors

• Antonius A. Lambregts · Renton, US
• Rolf Hansen · Esbjerg, DK

Key dates

• Filing date: Sep 14, 1981
• Grant date: Dec 6, 1983
• Expiry date: Sep 14, 2001

Classification

• Technology area (CPC G): Physics
• CPC primary: G05D1/0676
• WIPO field: Control
• WIPO sector: Instruments

Abstract

An improved inner loop control is disclosed for use in an aircraft pitch axis control system. Signals representative of vertical acceleration and pitch rate are complementary filtered and summed to produce an "inner loop" damping signal which is combined with "outer loop" command signals to produce an elevator control signal. The improved approach provides higher outer loop control law gains and better system stability, resulting in higher control bandwidth and tighter command tracking, especially in turbulence.