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answerhappygod
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USE MATLAB!!
USE MATLAB!!
The elastic force on the landing gear after touchdown may exhibit a nonlinear stiffening behavior as a function of aircraft vertical displacement. In this case, the SDOF equation of motion for vertical displacement of the aircraft may be expressed as my¨+cy˙+Fs(y)=mg with y defined positive downward. Fs(y) is a nonlinear spring force. Use a numerical integration technique such as the Euler's method or the RK4 method ('ode45' in MATLAB) to determine vertical displacement of an aircraft with the following characteristics: Aircraft weight: 2,100 lb Damping constant: 200 lb-s/in. Sink velocity at touchdown: 15ft/sec Spring force: Fs(y)=Ky(1+0.25y^2 ), where K=725lb/ in and y^=0 if ∣y∣ (measured in inches) is less than 3 inches; otherwise, y^=∣y∣−3.
The elastic force on the landing gear after touchdown may exhibit a nonlinear stiffening behavior as a function of aircraft vertical displacement. In this case, the SDOF equation of motion for vertical displacement of the aircraft may be expressed as my¨+cy˙+Fs(y)=mg with y defined positive downward. Fs(y) is a nonlinear spring force. Use a numerical integration technique such as the Euler's method or the RK4 method ('ode45' in MATLAB) to determine vertical displacement of an aircraft with the following characteristics: Aircraft weight: 2,100 lb Damping constant: 200 lb-s/in. Sink velocity at touchdown: 15ft/sec Spring force: Fs(y)=Ky(1+0.25y^2 ), where K=725lb/ in and y^=0 if ∣y∣ (measured in inches) is less than 3 inches; otherwise, y^=∣y∣−3.
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