Getting error in fmincon with below code how to correct it
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% Constants
m = 1; % mass of the rocket (kg)
x_target = 10; % target displacement (m)
t_final = 10; % final time (s)
% Objective function: integral of thrust squared
objective = @(F) integral(@(t) F(t).^2, 0, t_final);
% Initial guess for thrust profile (constant thrust)
%F0 = @(t) 0.0; % Initial guess for thrust profile is a zero vector
F0 = 0.0;
% Constraints
nonlcon = @(F) rocket_constraints(F, t_final, m, x_target);
% Solve optimization problem
options = optimoptions('fmincon', 'Display', 'iter');
F_opt = fmincon(objective, F0, [], [], [], [], [], [], nonlcon, options);
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답변 (2개)
Matt J
2024년 2월 19일
편집: Matt J
2024년 2월 19일
You seem to be trying to minimize over a space of functionals, F. You cannot do that with fmincon. The objective must be a function of an unknown parameter vector in and the initial point x0 must be a vector in
댓글 수: 4
Walter Roberson
2024년 2월 19일
fmincon() passes a vector the length of F0 to the objective function.
Your objective function takes that vector and tries to run an integration, with the integration trying to index the vector.
Torsten
2024년 2월 19일
이동: Torsten
2024년 2월 19일
If you define F0 = 0, "fmincon" will use one scalar value as input F to "objective" and "nonlcon". Thus the use of F as a function handle or function doesn't make sense.
댓글 수: 3
Torsten
2024년 2월 19일
편집: Torsten
2024년 2월 19일
The inputs to "objective" and "nonlcon" must be vectors of parameters to be optimized, not functions or function handles.
So you will have to parametrize your function to be integrated and optimize these parameters.
If you don't know how to do that, I suggest you license TOMS software which focusses on solving optimal control problems with MATLAB:
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