zonghemoxingcrack.m

内燃机转子仿真

clear all;
clc;
close all;
format long;
a1=pi/16;
a2=pi/4;
h=0.001;
t=3;
w=1000;
bt=rem(t,h);
bbt=t-bt;
n1=bbt/h;
    k=0;
for i=1:n1
    t(:,i)=(i-1)*h;


    oo=w*t(:,i)/60;
   
    if oo<=2*k*pi+0.5*pi-a1&oo>=2*k*pi

        ff(:,i)=0;
    elseif oo<=2*k*pi+0.5*pi+a2&oo>2*k*pi+0.5*pi-a2

        ff(:,i)=0.5*(1+cos((0.5*(oo-0.5*pi+a2)/a2)*pi));
    elseif oo<=2*k*pi+3*pi/2-a1&oo>2*k*pi+0.5*pi+a2

        ff(:,i)=0;
    elseif oo<=2*k*pi+3*pi/2+a1&oo>2*k*pi+3*pi/2-a1

        ff(:,i)=0.5*(1-cos((0.5*(oo-3*pi/2+a1)/a1)*pi));
    %elseif oo>2*k*pi+3*pi/2+a&oo<=2*pi+2*k*pi
    elseif 2*k*pi+3*pi/2+a2<oo<=2*pi+2*k*pi
        ff(:,i)=0;
    end
     if oo>=2*(k+1)*pi
        k=k+1;
    end
end
plot(t(:),ff(:));