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// A Texbook on POWER SYSTEM ENGINEERING
// A.Chakrabarti, M.L.Soni, P.V.Gupta, U.S.Bhatnagar
// DHANPAT RAI & Co.
// SECOND EDITION
// PART IV : UTILIZATION AND TRACTION
// CHAPTER 5: ELECTRIC TRACTION-SPEED TIME CURVES AND MECHANICS OF TRAIN MOVEMENT
// EXAMPLE : 5.4 :
// Page number 779
clear ; clc ; close ; // Clear the work space and console
// Given data
D = 2.0 // Distance between 2 stations(km)
V_a = 40.0 // Average speed(kmph)
V_1 = 60.0 // Maximum speed limitation(kph)
alpha = 2.0 // Acceleration(km phps)
beta_c = 0.15 // Coasting retardation(km phps)
beta = 3.0 // Braking retardation(km phps)
// Calculations
t_1 = V_1/alpha // Time for acceleration(sec)
T = 3600*D/V_a // Actual time of run(sec)
V_2 = (T-t_1-(V_1/beta_c))*beta*beta_c/(beta_c-beta) // Speed at the end of coasting period(kmph)
t_2 = (V_1-V_2)/beta_c // Coasting period(sec)
t_3 = V_2/beta // Braking period(sec)
// Results
disp("PART IV - EXAMPLE : 5.4 : SOLUTION :-")
printf("\nDuration of acceleration, t_1 = %.f sec", t_1)
printf("\nDuration of coasting, t_2 = %.f sec", t_2)
printf("\nDuration of braking, t_3 = %.f sec", t_3)
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