WO2012091634A1

WO2012091634A1 - Control system with increased response rate

Info

Publication number: WO2012091634A1
Application number: PCT/RU2011/001028
Authority: WO
Inventors: Александр Игоревич НОВИКОВ
Original assignee: Novikov Alexander Igorevich
Priority date: 2010-12-30
Filing date: 2011-12-27
Publication date: 2012-07-05
Also published as: RU2010154480A

Abstract

The invention relates to the field of control and is suitable for use in conjunction with PID(PI) controllers or in manual control without a controller. The proposed invention increases the response rate of the system in the event of a change in a set action (task), thus reducing the time of the transition process tn.n. (see figure 3). This technical result is achieved in that in the event of a change in a task, the proposed system provides, over a certain time, a value (corrected task) that is different from the required value in order to arrive rapidly at the required value. The corrected task can be either greater or less than the required value or can contain a sequence of values that are either greater or less than the required value.

Description

Management and regulation system

with high speed

Technical field

The invention relates to the field of process and parameter control and can be used both for automatic / automated control systems and for manual control.

State of the art

Known systems with manual control, as well as control systems based on PI, PID, and other types of controllers, which do not achieve maximum speed and do not fully realize the potential of existing equipment.

The disadvantage of these systems is that for the most part they are built according to linear laws.

Studies of patent documentation indicate the absence of analogues of the proposed system and the need to improve existing management and regulation systems.

Disclosure of invention

The objective of the invention is to increase the speed of the control or regulation system.

This is achieved by the fact that instead of the required Set task, the system or one (or several) of its subsystems for some initial time is given the adjusted Set task (Fig. 1-3), which is different from the required one.

The implementation of the invention

Technically, the device performing the task correction can be executed in the form of a computer program, controller, or completely absent (in the case of manual calculation).

At the same time, the modernization of the existing system is carried out without replacing equipment, but only by changing the laws of regulation. Examples:

The invention is not limited to the examples considered, which are provided only to explain the principle of operation.

Example 1

1st order aperiodic link (model)

The transfer function of the aperiodic link of the 1st order has the form:

W (p) = 1 / (Tr + 1)

where T = 10 is the time constant.

The calculation of the aperiodic link of the 1st order (Fig. 1) is made according to the formula:

H [n] = H [n-l] exp (-l / T) + Set [n-l] (l-exp (-l / T)) (1) where H [n] is the current value of the parameter;

H [p-1] - the previous value of the parameter;

Set [n-1] - previous value of the task;

T = 10 - time constant;

exp (-1 / T) - e ^ 2.7 in degree -1 / T.

Obtained to build a graph (Fig. 1), the data are given in table. one.

A system with increased speed is built similarly to (1), so we distinguish that the new adjusted task Set 'is used as a task:

H '[n] = H' [n-l] -exp (-l / T) + Sef [n-l] - (l-exp (-l / T)) (2) where H '[n] is the current value of the parameter;

H '[p-1] - the previous value of the parameter;

Set '[n-1] - previous value of the adjusted job;

T = 10 - time constant;

exp (-1 / T) - e ^ 2.7 in degree -1 / T.

The time during which the maximum value (100%) is set in the system is calculated for the aperiodic link of the 1st order according to the formula:

t = -T lnn ((100-Set) / (100-Ho))

where Set = 60 - a new task for the system;

But = 20 is the initial value of the parameter;

T = 10 - time constant;

100 - the maximum possible value of the task for the considered example. Substituting, we obtain t ~ 6.93, which means the need to set the value of the corrected set 'Set to 100 for six measures (see Table 1) and a value slightly less (97.13) during the seventh measure.

At the same time, the transition process t _n . _n . ' for the second system H ', obtained as a reaction to the "variable" task Set', is significantly less than the transition time t „.n. for the first system H, obtained as a reaction to the “constant” task Set equal to 60.

Example 2

2nd-order aperiodic link with delay and perturbation (model)

The transfer function has the form:

W (p) = e ^mp / ((T _lP + l) (T ₂ p + l)) + W p)

where Ti = 5 and T ₂ = 5 - time constants;

τ = 10 — delay;

W _f (p) is the perturbation.

The calculation of the aperiodic link of the 2nd order is made according to the formula:

Η [η] = Η [η-1] · (ΕΧΡ (-1 / Τ1) + ΕΧΡ (-1 / Τ2)) - Η [η-2] · ΕΧΡ (-1 / Τ1) · ΕΧΡ (-1 / Τ2) +

+ Set [n-2] - (1 -EXP (- 1 / T1)) · (1 -EXP (- 1 / T2))

H '[n] = Η' [η-1] · (ΕΧΡ (-1 / Τ1) + ΕΧΡ (-1 / Τ2)) - Η '[η-2] · ΕΧΡ (-1 / Τ1) · ΕΧΡ ( -1 / Τ2) +

+ Sef [n-2] - (1 -EXP (- 1 / T1)) · (1 -EXP (- 1 / T2))

where H [n], H '[n] - the current value of the parameter;

H [p-1], p-1], H [p-2], H '[p-2] - the previous value of the parameter;

Set [n-2], Set '[n-2] - previous values of the task and the adjusted task; T _! = 5 and T ₂ = 5 - time constants;

exp (-1 / T) - e ~ 2.7 to the power of -1 / T.

Given the perturbation and delay, we have:

n] = Η [η- τ] + f [n]

H ' _f [n] = Η' [η- τ] + fin]

where f [n] is a perturbation (a random number in the range from -1 to +1

τ = 10 — delay;

Obtained to build a graph (Fig. 2), the data are given in table. 2.

At the same time, the transition process t _n . _n . ' for the second system, H _f ', obtained as a reaction to the "variable" job Set', is significantly less than the transition time t „.„. for the first system, H _f , obtained as a reaction to the “constant” task Set equal to 60. Example 3

Temperature in the oven (real object)

A schedule of observations of a real object is shown in FIG. 3.

Observation data for plotting (Fig. 3) are given in table. 3.

In this case, the value of the adjusted Set 'task is set equal to 90 ° C for a time of two minutes, and after equal to 20 ° C for a time of three minutes with further installation at the required level (60 ° C).

Experiments conducted on a real object confirm the simulation results. The graph (Fig. 3) shows a significant reduction in the transition process (t _n . _N. '<T _n . _N. ) -

Brief Description of Charts

In FIG. 1 - Model of the aperiodic link of the 1st order;

In FIG. 2 - Model of the aperiodic link of the 2nd order with delay and disturbance;

In FIG. 3 - Experimental observation data for a real object. The temperature in the oven.

Chart Positions

1 - Set - Set value (task);

2 - T, N or N / - Adjustable (controlled) parameter;

3 - Set '- The task entered for the speedy achievement of the required value of the adjustable (controlled) parameter in a system with increased speed;

4 - T ', H' or NU- Change in an adjustable (controlled) parameter in a system with increased speed.

Short description of tables

Table 1 - Values for plotting (Fig. 1) an aperiodic link of the 1st order;

Table 2 - Values for constructing a graph (Fig. 2) of the aperiodic link of the 2nd order with delay and disturbance;

Table 3 - Values for constructing a graph (Fig. 3) of experimental observation data for a real object. Table 1

table 2

Table 3

Claims

Claim

A system or subsystem of control or regulation or a regulator, characterized in that the driving influence (task) is changed modulo larger than the required one, with alternating values greater than the required driving influence and smaller than the required driving action or without it, followed by setting the target action to the desired value.