华北电力大学过程计算机控制课设DDC串级回路PID闭环

,oy+20,"30"); outtextxy(ox+50*7-7,oy+20,"35"); outtextxy(ox+50*8-7,oy+20,"40"); outtextxy(ox+50*9-7,oy+20,"45"); outtextxy(ox+50*10-7,oy+20,"50"); outtextxy(ox-10,oy-50*1,"1"); outtextxy(ox-10,oy-50*2,"2"); outtextxy(ox-10,oy-50*3,"3"); outtextxy(ox-10,oy-50*4,"4"); outtextxy(ox-10,oy-50*5,"5"); outtextxy(ox-10,oy-50*6,"6"); outtextxy(ox-10,oy-50*7,"7"); outtextxy(ox-10,oy-50*8,"8"); /* 坐标轴刻度标识*/ settextstyle(SMALL_FONT,HORIZ_DIR,5); /* 坐标轴标示字体方向大小*/ outtextxy(xtext1x,xtext1y,"Time"); outtextxy(xtext2x,xtext2y,"t\/s"); settextstyle(SMALL_FONT,VERT_DIR,5); outtextxy(ytext1x,ytext1y,"The output (Response)"); outtextxy(ytext2x,ytext2y,"U(t)\/V"); }} main() { float kp,ti,td,tf,e[3]={0},ee[3]={0},u[6]={0},au1=0; int r=1,k=1; Initial_Sys(); DrawAxis(); while(k<100) { u[0]=lxpid(1,3.0,10,e,u[1]);