Using hooke-jeeves method with ode45

2016 1 21
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更新时间：2016 1 21
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Hello, I got an ode45 function and I really need to reverse kinematics. I cant transform the formulas so natural way is to do it by optimalization. Ive heard that Hooke-Jeeves should be helpful but to be honest I cant really combain it ;/ Can anyone tell me if it is possible to do it and if yes help me with reasonable sources? I would be very thankful.

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Jan
Jan 2016-1-21
The question has only a weak connection to Matlab. Perhaps somebody has an idea, but the problem is off-topic.
Jakub
Jakub 2016-1-21
Why is that? Im coding it all in matlab and I guess ode45 is matlab only function?

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Star Strider
Star Strider 2016-1-21

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See if the File Exchange contribution Unconstrained optimization using Hooke & Jeeves does what you want.

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Jakub
Jakub 2016-1-21
It looks cool. Can anyone help me with it tho?
[t,x]=ode45(@discfltEOM,tspan,x0,options,CoefUsed);
&x0 are input parameters in a vector
%Hooke-Jeeves
% Sx : objective function
% guess : initial point
% par : parameters needed to function
% ip : (0): no plot (default), (>0) plot figure ip with pause, (<0) plot figure ip
% Lb, Ub : lower and upper bound vectors to plot (default = guess*(1+/-2))
% problem : (-1): minimum (default), (1): maximum
% tol : tolerance (default = 1e-4)
% mxit : maximum number of stages (default = 50*(1+4*~(ip>0)))
% stp : stepsize vector for the independent variables (default = max(0.01*abs(guess+~guess),0.1))
% amp : stepsize enlargement factor (1,oo) (default = 1.5)
% red : stepsize reduction factor (0,1) (default = 0.5)
% xopt : optimal point
% Opt : optimal value of Sx
% Nav : number of objective function evaluations
[xopt,Opt,Nav]=hkjeeves(Sx,guess,ip,Lb,Ub,problem,tol,mxit,stp,amp,red,par1, par2,...)
I dont really know who to combain those fuctions ;/ Yeah I realize Im newbie with MatLab.
Star Strider
Star Strider 2016-1-21
Kinematics are not in my areas of expertise. I just found it on the File Exchange for you.

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Jakub
Jakub
2016-1-21

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Star Strider
Star Strider
2016-1-21

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