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Accession Number:

AD0831091

Title:

Direct Lift Control for the Lams B-52

Author(s):

• Nelsen, Gary L.
• Lorenzetti, Robert C.

Author Organization(s):

• AIR FORCE INSTITUTE OF TECHNOLOGY WRIGHT-PATTERSON AFB OH

Report Date:

1968-06-01

Abstract:

A DLC (Direct Lift Control) system was designed for the LAMS B-52 test aircraft using optimization theory. Spoilers, symmetric ailerons, and elevator respond to normal longitudinal column movements, achieving incremental rates of climb up to 500 fpm from trim without pitching the aircraft. DLC reduces normal acceleration 50%, both in and out of turbulence, and improves airspeed control in precision maneuvering tasks: Approach and landing, in-flight refueling, and terrain following. The closed-loop DLC controller, consisting of fixed-gain normal acceleration, pitch angle, and pitch rate feedbacks to the three control surface servos, was demonstrated by a piloted six degree of freedom analog simulation.

Document Type:

Conference:

Journal:

Pages:

303

File Size:

28.04MB

Contracts:

Grants:

Descriptors:

Identifiers:

• B 52 AIRCRAFT
• CLOSED LOOP SYSTEMS
• CONTROL
• CONTROL SYSTEMS
• DIRECT LIFT CONTROL
• DLC(DIRECT LIFT CONTROL)
• FLY BY WIRE
• LOAD ALLEVIATION AND MODE STABILIZATION

SubjectCategory:

• Aviation Technology
• Aviation Technology

Communities of Interest:

• Weapons Technologies

Distribution Statement:

Approved For Public Release

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