realtime systems, control loop.

ND · science forum beginner Joined: 12 Apr 2006 Posts: 5

can someone rewrite the programm using intergal algo. method. to reduce
the error to almost zero. the programm is for the fan to start auto.
and cool the processor when the temp. gets to the set point or to
maintian a steady state. ( i have a graph temp against time
)

if (MV < SP)
{
cs = gain * ((MV - SP) + iterm * (integral));
}
else
{
cs = gain2 * ((MV - SP) + iterm * (integral));
}

if (cs > 1)
{
pwm_max = 0 ;
t = cs ;
if (t > 100) t = 100 ;
fan_max = t ;
}
else if (cs < 1)
{
t = -cs ;
if (t > 100) t = 100 ;
pwm_max = t ;
fan_max = 0 ;
}
else
{
fan_max = pwm_max = 0;
}
sprintf(buffer2,"MV = %2.1f I= %2.1f SP = %2.1f HEATER = %d FAN =
%d",MV,integral*iterm,SP,pwm_max,fan_max);
moveto(100,50);
outtext(buffer2);
smooth[smooth_pnt++] = yscale(MV) ;
smooth_pnt &= 0x3 ;
posit = (int)((smooth[0] + smooth[1] + smooth[2] + smooth[3])/4) ;

AntiSPAM_g9u5dd43@yahoo.c · science forum beginner Joined: 18 Feb 2006 Posts: 6

On 12 Apr 2006 12:44:07 -0700, "ND" <imondc@hotmail.com> wrote:

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