The rotate speed of dc machine and bring to bear on at electric machinery the vo

The rotate speed of dc machine and bring to bear on at electric machinery the voltage size of two end is concerned, can use C8051F060 piece the rotate speed that the output of the DAC0 of converter of D ／ A inside controls the voltage of dc machine to dominate electric machinery thereby. Use simple scale adjuster algorithm here (add simply one, decrease one law) . The output system pattern of scale adjuster is:

In type: Y is the output of adjuster; E(t) is adjuster lose a person, it is deviation value commonly; Kp is coefficient of proportionality.

From type (2) can see, the output Y of adjuster and E(t) of input deviation value become direct ratio. Accordingly, want deviation E(t) to appear to arise only to it proportionate adjustment action, have adjust seasonable characteristic, this is a kind of the basiccest adjustment the rule. The size of scale adjustment action besides be concerned with deviation E(t) , basically depend on Kp of coefficient of proportionality, scale adjustment coefficient heals big, adjust action is stronger, dynamic character is bigger also. Conversely, coefficient of proportionality is smaller, adjust working is younger. To most inertial link, self-oscillation will be caused when Kp is too big. The main drawback of scale adjustment is existence static difference, to disturbing inertial link, self-oscillation will be caused when Kp is too big. Bigger to disturbing, inertial older also system, if use pure scale regulator be hard to trends of give attention to two or morethings and static character, need to use adjust the adjuster of PI(scale integral with more complex rule) or PID(scale, integral, differential adjuster) algorithmic.