What Is Autoregulation?

A mechanism that automatically maintains the production process running under specified conditions is called automatic adjustment, and its meaning and application range are very wide.

A mechanism that automatically maintains the production process running under specified conditions is called automatic adjustment, and its meaning and application range are very wide.

Chinese name

Automatic adjustment

Foreign name

Automatic adjustment

Meaning

Automatically maintain the production process under the specified conditions

Classification

Automatic combustion adjustment, etc.

Automatic adjustment furnace

The furnace and furnace automatic adjustment mainly includes: automatic combustion adjustment, automatic adjustment of feed water, automatic adjustment of steam temperature, automatic adjustment of transfer, automatic adjustment of blower fan, automatic adjustment of bypass system, etc.

Automatic adjustment

The method of prescribing feedback is also called auto-adjusting prescribing. formula:

X_ (n + 1) = {X_n + [A / (X ^ (k-1) -X_n] 1 / k}

"_" Indicates a subscript, and "^" indicates a superscript. For example, X ^ 2 means the square of x; X_1 means the first X.

For example, A = 5, k = 3, that is: 35 = X.

5 is between 1 ^ 3 and 2 ^ 3 (the third power of 1 = 1, the third power of 2 = 8)

X_0 can take 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2.0. For example, we take 2.0. According to the formula:

Step 1: X_1 = {2.0+ [5 / (2.0 ^ 2-2.0] 1/3 = 1.7.}. That is, 5/2 × 2 = 1.25, 1.25-2 = -0.75, 0.75 × 1/3 = 0.25 ,

2-0.25 = 1.75, take 2 digits, which is 1.7.

Step 2: X_2 = {1.7+ [5 / (1.7 ^ 2-1.7] 1/3 = 1.71} .. That is 5 / 1.7 × 1.7 = 1.73010, 1.73-1.7 = 0.03, 0.03 × 1/3 = 0.01,

1.7 + 0.01 = 1.71. Take 3 digits, take one more digit than before.

Step 3: X_3 = {1.71+ [5 / (1.71 ^ 2-1.71] 1/3 = 1.709}

Step 4: X_4 = {1.709+ [5 / (1.709 ^ 2-1.709] 1/3 = 1.7099}.

This method can be adjusted automatically. The values of the first and third steps are too large, but after the calculation, the output value will automatically decrease; in the second and fourth steps, the input value is too small and the output value will automatically increase. X_4 = 1.7099.

Of course, you can also take 1.1, 1.2, 1.3. . . Any of 1.8, 1.9.

... a must be greater than or equal to zero '', i.e. a is non-negative

Square root formula

X (n + 1) = Xn + (A / Xn Xn) 1/2. (N, n + 1 and are subscripts)

For example, A = 5:

5 is between the square of 2 and the square of 3; We can take the initial values of 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, and 2.9, and we'd better take the intermediate value of 2.5.

Step 1: 2.5+ (5 / 2.5-2.5) 1/2 = 2.2;

That is, 5 / 2.5 = 2, 2-2.5 = -0.5, -0.5 × 1/2 = -0.25, 2.5 + (-0.25) = 2.25, take the two-digit 2.2.

Step 2: 2.2+ (5 / 2.2-2.2) 1/2 = 2.23;

That is 5 / 2.2 = 2.27272, 2.27272-2.2 = -0.07272, -0.07272 × 1/2 = -0.03636, 2.2 + 0.03636 = 2.23. Take the 3-digit number 2.23.

The third step: 2.23+ (5 / 2.23-2.23) 1/2 = 2.236.

That is, 5 / 2.23 = 2.2421525, 2.2421525-2.23 = 0.0121525, 0.0121525 × 1/2 = 0.00607, 2.23 + 0.006 = 2.236., Take 4 digits.

Take one more digit for each step. This method is also called feedback square. Even if you enter a wrong value, it doesn't matter. The output value will be adjusted automatically, close to the exact value.

For example A = 200.

200 is between the square of 10 and the square of -20. The initial value can be 11, 12, 13, 14, 15, 16, 17, 18, 19. We go to 15.

15+ (200 / 15-15) 1/2 = 14. Taking 19 also gives 14. : 19+ (200 / 19-19) 1/2 = 14.

14+ (200 / 14-14) 1/2 = 14.1.

14.1+ (200 / 14.1-14.1) 1/2 = 14.14.

Calculating automatic adjustments can be used for shooting, intercepting missiles, taking off and landing aircraft, etc.

Automatic adjustment fuzzy automatic adjustment controller

The controller has the advantages of short adjustment time, good robustness and adaptability. The control of ginning machine is a system with severe time delay and non-linearity. It is suitable to use this kind of controller.

The principle of logistics control is as follows:

After the fuzzy controller compares the signal from the current sensor with a given value, it controls the single parameter factor through the automatic adjustment mechanism to adjust the parameters of the controller. The output of the controller is the input reference signal of the inverter, so that Output frequency, adjust the speed of the motor, change the seed cotton flow. Make the load of the gin and the main motor stable at the expected value.

This kind of automatic adjustment controller can also be adapted to other control systems with unclear mathematical models, multivariable coupling, and severe nonlinearity. ^[1]