Path: StraightLine/ConstantAccel
% Computes power and thrust, constant accel, as a function of specific power. Assumes constant acceleration to the midpoint then constant deceleration. This is for constant exhaust velocity. The power and thrust are the maximum value which occurs at the beginning of the trajectory, when the mass is highest. As fuel mass is consumed the power and thrust drop accordingly. This function automatically limits results to sigma's that will work. Type ThrustElectric for a demo. -------------------------------------------------------------------------- Form: ThrustElectric; % demo to 10 AU [thrust, sigma, mE, mF, power, dV] = ThrustElectric( tM, d, uE, sigma, f, eta, mP ) -------------------------------------------------------------------------- ------ Inputs ------ tM (1,1) Mission time (sec) d (1,1) Distance (km) uE (1,1) Exhaust velocity (km/s) sigma (1,:) Specific power (W/kg) f (1,1) Structural fraction (kg/kg fuel) eta (1,1) Engine efficiency mP (1,1) Mass of spacecraft not including fuel, fuel tankage or engine ------- Outputs ------- thrust (1,:) Maximum thrust (N) sigma (1,:) Specific power (W/kg) mE (1,:) Engine mass (kg) mF (1,:) Fuel mass (kg) vMax (1,1) Maximum velocity power (1,:) Engine power (W) dV (1,1) Delta V (km/s) -------------------------------------------------------------------------- See also MassFuelElectricConstantUE --------------------------------------------------------------------------
Common: Database/Constant Common: Graphics/Plot2D
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