www.pudn.com > youhua.zip > Main_Opt.m, change:2013-08-19,size:1344b


clc 
clear 
global para 
global df1 df2 df Df dr1 dr2 dr Dr Lsf Lsr  Af1 Af2 sf Sf  V0f Ar1 Ar2 sr Sr V0r 
%% 
%系统参数 
Fr=1053400;      %单个悬架满载受力1.0534e6 N 
r = 1.401;        %气体的绝热系数,静刚度时取1,动刚度时双原子气体取1.4 
Ff=749545;   %单个悬架满载受力7.49545e5 N 
rou=890;  %油液密度 
Kf=2*4900*1000; %前轮刚度 
Kr=4*4900*1000; %后轮刚度 
g=9.8; 
L=6650/1000; 
Ljf=500/1000;  
Lf=L*Fr/(Ff+Fr);  
Lr=L*Ff/(Ff+Fr);  
M=600*1000;  
mf=M/3-2*Ff/g-2*8*1000;  
mr=2*M/3-2*Fr/g-4*8*1000; 
J=2*Fr*Lr^2/g+2*Ff*Lf^2/g;  
Ms=51;  
Ks=450;  
Cs=75;  
n=2;  
Cd=0.62;  
 
tstart=0; 
tend=20; 
tstep=0.01; 
tspan=[tstart tend]; 
t=[0:0.01:20]; 
x=wgn(2001,1,20); 
simin=[t',x]; 
tt=zeros(2001,1); 
t1=0:0.01:0.99; 
x1=zeros(100,1); 
t2=1:0.01:1.13; 
x2=0.4-80.*abs(t2-1.065)./13; 
t3=1.14:0.01:20; 
x3=zeros(1887,1); 
x=[x1; x2';x3]; 
tt=[t1'; t2';t3'];  
simin1=[tt,x]; 
para=[Fr,r,Ff,rou,Kf,Kr,g,L,Ljf,Lf,Lr,M,mf,mr,J,Ms,Ks,Cs,n,Cd,tspan]; 
 
tic 
lb=[5/1000,5/1000,320/1000,420/1000,5/1000,5/1000,220/1000,320/1000,50/1000,20/1000]; 
ub=[15/1000,15/1000,380/1000,480/1000,15/1000,15/1000,280/1000,380/1000,150/1000,40/1000]; 
options=gaoptimset('populationSize',20,'Generations',100,'CrossoverFraction',0.8); 
options=gaoptimset(options,'HybridFcn',@fminsearch); 
[dv,f,exitflag]=ga(@Objection,10,[],[],[],[],lb,ub,[],options) 
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