Claims
- 1. Method of indicating the nose wheel velocity of an aircraft to a pilot of the aircraft for controlling lateral acceleration limits of the aircraft including the steps of:
- providing a signal representative of left main gear wheel velocity;
- providing a signal representative of right main gear wheel velocity;
- computing a value representative of nose wheel velocity utilizing an equation derived from rigid body motion of said aircraft, wherein said equation is: ##EQU2## where V.sub.N is the synthesized nose wheel velocity, L is the length of the body between nose gear and main gear, V.sub.L is the velocity of said left main gear wheel, V.sub.R is the velocity of said right main gear wheel, said right main gear wheel symmetrically opposed to said left main gear wheel, and T is the track width between left and right main gear wheels;
- providing a signal proportional to the computed value representative of nose wheel velocity;
- utilizing such signal to drive a display indicating nose wheel velocity; and
- then, utilizing said computed nose wheel velocity for controlling the lateral acceleration limits of the aircraft.
- 2. A converter circuit for generating nose wheel speed signals from main landing wheel speed signals, said converter having:
- a first converter input terminal;
- a second converter input terminal;
- a converter output terminal;
- said first converter input terminal responsive to a signal V.sub.L representative of left main gear wheel velocity;
- said second converter input terminal responsive to a signal V.sub.R representative of right main gear wheel velocity;
- first means for providing a signal representative of K.sub.1 V.sub.L -K.sub.2 V.sub.R ; and,
- second means for providing a signal representative of K.sub.1 V.sub.R -K.sub.2 V.sub.L where K.sub.1 and K.sub.2 are fixed constants;
- a select largest circuit having an output terminal coupled to said converter output terminal, said select largest circuit selecting the largest of said signals representative of V.sub.L, V.sub.R, K.sub.1 V.sub.L -K.sub.2 V.sub.R, and K.sub.1 V.sub.R -K.sub.2 V.sub.L to provide said nose wheel signals.
- 3. The invention according to claim 2 wherein said fixed constants K.sub.1 and K.sub.2 equal about 1.8 and 1.1 respectively.
Parent Case Info
This application is a continuation-in-part of application Ser. No. 141,441 filed Apr. 18, 1980 now U.S. Pat. No. 4,322,809.
US Referenced Citations (8)
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
141441 |
Apr 1980 |
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