KR101117856B1 - Error correction method of actuator of air conditioning system for a car - Google Patents

Abstract

The present invention relates to an actuator error correction method for controlling the opening and closing of various doors of an air conditioner for a vehicle, by correcting an error generated by the inertia of the motor of the actuator by learning, the actual stop position of the actuator is accurate target It is an object of the present invention to provide a method for correcting an actuator error of an air conditioner for a vehicle in which various doors connected to the actuator can be accurately rotated to a desired position.

In order to achieve the above object, the present invention provides a method for compensating an actuator error of an automotive air conditioner, comprising the steps of: a) receiving a target feedback potential value (target F / B Volt, m); b) receiving a current feedback potential value (current F / B Volt, n); c) determining whether the target feedback potential value m is equal to the current feedback potential value n; d) If the target feedback potential value m and the current feedback potential value n are not the same, the actuator is driven toward the target feedback potential value m to drive the target feedback potential value m and the current feedback potential. Matching the value n; e) If the target feedback potential value m and the current feedback potential value n are the same, an error between the position feedback potential value n 'and the target feedback potential value m of the actuator after stopping the actuator Detecting and storing; and f) shutting off the power to the actuator in advance of the target feedback potential value (m) by the error when driving the actuator using the detected and stored errors.

Air Conditioners, Doors, Actuators, Control, Error, Learning, Calibration

Description

ERROR CORRECTION METHOD OF ACTUATOR OF AIR CONDITIONING SYSTEM FOR A CAR}

1 is a schematic configuration diagram of a conventional actuator.

2 is a control flowchart of a conventional actuator.

3 is a conceptual diagram showing the actual stop position of the actuator when the current feedback potential value is lower than the target feedback potential value and when the current feedback potential value is higher than the target feedback potential value.

4 is a control flowchart relating to error correction of an actuator according to the present invention.

<Explanation of symbols for the main parts of the drawings>

1 ... Actuator

1a ... Carbon Resistance

1b ... Motor

2.Automatic Temperature Controller (ATC)

m ... Target feedback potential value (target F / B Volt)

n ... current feedback potential value (current F / B Volt)

n '... position feedback potential value                 

r ... Reference potential value (Ref)

g ... Ground potential value (Sensor Gnd)

N ... number of target feedback potential values

 The present invention relates to an actuator error correction method for controlling the opening and closing of various doors of the air conditioner for automobiles, and more particularly, by correcting the error generated by the inertia of the motor of the actuator by learning, The present invention relates to a method for compensating an actuator error of an air conditioner for a vehicle in which an actual stop position of an actuator reaches a correct target position, so that various doors connected to the actuator can be accurately rotated to a desired position.

In general, an automobile air conditioner is a heat exchanger by selectively passing heat or internal air introduced into a vehicle interior by a blower unit having a blower fan to an evaporator through which a refrigerant flows or a heater through which cooling water in a vehicle engine flows. It is an apparatus for cooling and heating a vehicle interior by distributing in various directions of the vehicle interior in a cold or warm state through vents connected to each part of the interior.

In the air conditioning case of the vehicle air conditioner, the bet is rotated between the air inlet connected to the flow passage of the bet of the vehicle and the air inlet connected to the flow passage of the outside air of the vehicle to selectively introduce the bet or the outside air. Internal and external air switching doors are provided to selectively open and close the inlet and the outside air inlet, and are also rotatably installed between the evaporator and the heater core so as to adjust the temperature of the inside or outside air according to the opening degree. Equipped with. Furthermore, each vent is provided with a mode door for selectively controlling the amount of cold / hot air flowing according to the opening degree of the temporal door to be discharged into the cabin for each blowing mode.

The various doors described above are connected to a link mechanism consisting of a link arm and a lever installed at an outer side of the air conditioning case and hingedly connected to the respective door shafts, and the link mechanisms interlock with each other by a driving means such as an actuator. While adjusting the air inlet direction, temperature and discharge direction.

Although there are various kinds of actuators, a feedback actuator (F / B actuator) using a potential meter is commonly used.

1 shows a schematic configuration diagram of such an actuator.

As shown in FIG. 1, the feedback actuator includes a carbon resistor 1a and a motor 1b and is connected to an automatic temperature controller 2.

One end of the carbon resistor 1a has a reference potential value, for example, reference potential values Ref and r of +5 mA, and the other end of the carbon resistor 1 a is grounded, whereby a ground potential value of 0 mA ( Sensor Gnd, g), and a central portion of the carbon resistor 1a is connected to the controller 2 and has a target feedback potential value (target F / B Volt, m) set by the controller 2.                         

The motor 1b indicates the position of the current motor as a current feedback potential value (current F / B Volt, n), and the controller 2 is based on the current feedback potential value n to present the current actuator motor 1b. ) Position is detected.

The controller (2) is located on the front of the vehicle interior, and on the panel (panel) of the controller, by controlling the temp door to adjust the temperature of the air blown into the vehicle interior (not shown); A mode change switch (not shown) for adjusting a blowing mode of air blown into the vehicle interior is provided by adjusting the mode door.

When the driver adjusts the temperature control switch or the mode change switch to a desired position, a target position is input to the controller 2 in the form of a target feedback potential value m, and a central portion of the carbon resistor 1a is the target. It has a feedback potential value m.

Moreover, the said controller 2 detects the position of the present actuator 1 by detecting the present feedback potential value n of the said motor 1b.

If the target feedback potential value m and the current feedback potential value n are different, the controller 2 matches the two potential values m and n by driving the motor 1b. Therefore, opening and closing of various doors connected to the actuator 1 is controlled.

FIG. 2 shows a control flowchart of the actuator 1 described above.

First, when the driver adjusts the temperature control switch (not shown) or the mode changeover switch (not shown) on the panel of the controller 2 located in front of the vehicle interior to a desired position, the controller 2 has a target position. It is input in the form of a feedback potential value (target F / B Volt, m), and the center portion of the carbon resistor 1a has the target feedback potential value m (S1).

At this time, the controller 2 detects the position of the current actuator 1 in the form of a current feedback potential value (current F / B Volt, n) (S2).

Next, the target feedback potential value m is compared with the current feedback potential value n (S3). When the two potential values m and n are different, the motor 1b of the actuator is determined. The motor is driven by rotation (0V-> reference potential value) or reverse rotation (reference potential-> 0V) (S4).

As described above, while driving the motor 1b of the actuator, the changing current feedback potential value n is input again (S2) and compared with the target feedback potential value m (S3).

If the two potential values m and n coincide with each other, the doors connected to the actuator 1 are stopped by turning off the power supply for driving the motor 1b of the actuator and stopping the motor 1b. It is controlled to be rotated to (S5).

However, the conventional feedback actuator 1 as described above is operated by a DC motor, so that even if the power supply of the motor 1b is cut off, it is operated to some extent by inertia, and thus the motor 1b is actually used. Has a problem in that the position at which is stopped has a predetermined difference (a) from when the power is cut off.

3 shows the actual stop position of the actuator 1 when the current feedback potential value is lower than the target feedback potential value and when the current feedback potential value is higher than the target feedback potential value when the power supply of the motor 1b is cut off. will be.                         

As shown in FIG. 3, the conventional feedback actuator generates an error between the target position and the actual stop position of the actuator, and therefore, the actual stop position of the actuator with respect to the same target position is obtained when the actuator is rotated forward. There was a problem that the difference as much as the error (a) and the error (b) in the case of reverse rotation.

In particular, in the case of the actuator of the temporal door which controls the temperature of the air blown into the interior of the vehicle, even if the same target temperature is set, the actual blowing temperature is different according to the operation of the actuator. There was a problem that is not made.

In addition, the error generated when the motor 1b is operated by inertia after the power of the motor 1b is turned off is not always kept constant, but the torque and speed of the motor 1b, Since it depends on the driving angle of the actuator 1 and the like, there is a problem that cannot be compensated constantly.

The present invention has been made to solve the above problems, by correcting the error caused by the inertia of the motor of the actuator by learning, so that the actual stop position of the actuator to reach the correct target position, connected to the actuator It is an object of the present invention to provide a method for correcting an actuator error of an air conditioner for a vehicle that allows various doors to be accurately rotated at a desired position.

In order to achieve the above object, the present invention provides a method for compensating an actuator error of an air conditioner for a vehicle. Receiving an input; b) receiving a current feedback potential value (current F / B Volt, n); c) determining whether the target feedback potential value m is equal to the current feedback potential value n; d) driving the actuator when the target feedback potential value m and the current feedback potential value n are not the same; e) When the target feedback potential value m and the current feedback potential value n are the same, after stopping the actuator 1, the position feedback potential value n 'of the actuator and the target feedback potential value m Detecting and storing an error of; and f) shutting off the power to the actuator in advance of the target feedback potential value (m) by the error when driving the actuator using the detected and stored errors.

Furthermore, the present invention further includes repeating steps a) to e) for each target feedback potential value m between the ground potential values Sensor Gnd and g and the reference potential values Ref and r. It further comprises a step.

In particular, the step e) preferably further includes the step of detecting and storing the error a when the actuator is rotated forward and the error b when the actuator is rotated reversely.

Hereinafter, an embodiment of the present invention will be described in detail with reference to FIG. 4.

The same code | symbol is used about the same structure as the prior art, and repeated description is abbreviate | omitted.                     

4 is a control flowchart of error correction of an actuator according to the present invention.

The error correction of the actuator according to the present invention shown in FIG. 4 is performed in advance before controlling the actuator as shown in FIG. 2.

First, when power is initially supplied, the controller ATC (Automatic Temperature Controller) 2 selects 0 as the first target feedback potential value (target F / B Volt, m) (S10).

Then, the controller 2 detects the position of the current actuator 1 in the form of the current feedback potential value (current F / B Volt, n) (S20).

Next, it is determined whether the target feedback potential value m = 0 and the current feedback potential value n are the same (S30).

As a result of the determination in step S30, when the target feedback potential value m and the current feedback potential value n are not the same, i) driving the actuator 1 to the target feedback potential value m side; (S40), ii) Re-enter the current feedback potential value that changes according to the drive of the actuator 1 (S20), i) Return to the step S30, and return the target feedback potential value and the current feedback that has been input again. Determine whether the potential value is the same.

As a result of the determination in step S30, when the target feedback potential value m and the current feedback potential value n are the same, i) by cutting off the power supplied to the motor 1b of the actuator 1, If the operation of the actuator 1 is stopped (S50), and ii) the actuator 1 stops after continuing operation somewhat by inertia, the position feedback potential value n 'as the actual stop position of the actuator 1 is stopped. ) Is input (S60), i) actual stop of the current actuator from the target feedback potential value m as a target position, the difference between the target feedback potential value m and the re-input feedback potential value n as a target position. The error is detected and stored as an error indicating the degree of deviation of the position feedback potential value n 'as the position (S70).

That is, the error is detected by the relation between the error = target feedback potential value m and the current feedback potential value n.

Here, in step S70, the error a when the actuator is rotated forward and the error b when the actuator is rotated reversely are respectively detected and stored (see FIG. 3).

Next, it is determined whether the target feedback potential value m is equal to the reference potential values Ref and r (S80).

If the target feedback potential value m and the reference potential value r are not equal as a result of the determination in the step S80, i) the ground potential values Sensor Gnd and g and the reference potential values Ref and r The reference potential value r is divided by the value N-1 minus 1 from the number N of target feedback potential values m present between and (r / N-1), and (r / N The sum of the value of -1) and the target feedback potential value m is input again as a new target feedback potential value m = m + r / N-1 (S90), and ii) the step S30. Returning to, it is determined whether the new target feedback potential value m is equal to the current feedback potential value n.

As a result of the determination in step S80, when the target feedback potential value m and the reference potential value r are the same, all of the error correction processes of the actuator 1 as described above are completed (S100).

For example, the existing target feedback potential value is 0 kV (m = 0 kV), the reference potential value is 5 kV (r = 5 kV), and the ground potential value g = 0 kV and the reference potential value r = 5 kV. When the number of target feedback potential values of m is 5 (N = 5),

New target feedback potential value (m) = existing target feedback potential value (m = 0) + reference potential value (r = 5Ｖ) ÷ number of target feedback potential values minus 1 (N-1 = 4) The new target feedback potential value (m = 5/4 kHz) is determined.

Therefore, in the initial step S10, 0 Ｖ was selected as the first target feedback potential value (m = 0 Ｖ), but after the process from step S10 to step S90, the new target feedback potential value is 5/4 Ｖ. The value increases by, and the process from step S10 to step S90 is repeated for the new target feedback potential value m = 5/4 kHz.

As a result, when the new target feedback potential value m becomes equal to the reference potential value r (m = 5 ms, r = 5 ms), the error correction process of the actuator as described above is completed.

According to the error correction process of the actuator according to the present invention as described above, for example, the initial target feedback potential value (m) is 0Ｖ, the reference potential value (r) is 5Ｖ, the ground potential value (g) and the reference When the number N of target feedback potential values between the potential values r is five, the controller 2 exists between the ground potential value g = 0 kV and the reference potential value r = 5 kV. For each target feedback potential value (m = 0, 5/4, 10/4, 15/4, 5 kHz), the errors present can be detected and stored, respectively.                     

Therefore, in the subsequent adjustment of opening and closing of the various doors by actually controlling the actuator 1, in consideration of the respective errors with respect to the respective target feedback potential values m, the error of the actuator motor 1b in advance as much as the error. By shutting off the power, the actual stop position of the actuator can be reached to the correct target position, so that the various doors connected to the actuator 1 can be rotated exactly at a desired position.

According to the present invention having the above-described configuration, by controlling the actuator of the vehicle air conditioner, the error generated by the inertia of the actuator motor is learned and stored in advance before controlling the opening / closing of the door, and when the actuator is controlled later, By correcting and controlling the error, the actual stop position of the actuator can be reached to the correct target position, so that various doors connected to the actuator can be accurately rotated at a desired position.

Therefore, accurate control of the vehicle interior temperature and comfort of the vehicle interior can be maintained by accurate control of the temper door, and accurate control of the blowing mode is possible by accurate control of various blower switching doors, and the door for switching the inside and outside air. Precise control of the effect of preventing the reduction of the efficiency of the air conditioning system by the introduction of unwanted outside air.

Claims (3)

In the actuator error correction method of the automotive air conditioner, When driving engine of vehicle a) receiving a target feedback potential value (target F / B Volt, m); b) receiving a current feedback potential value (current F / B Volt, n); c) determining whether the target feedback potential value m is equal to the current feedback potential value n; d) driving the actuator when the target feedback potential value m and the current feedback potential value n are not the same; e) When the target feedback potential value m and the current feedback potential value n are the same, after stopping the actuator 1, the position feedback potential value n 'of the actuator and the target feedback potential value m Detecting and storing an error of; f) disconnecting power to the actuator in advance of the target feedback potential value m when the actuator is driven by using the detected and stored errors; Actuator error correction method of a vehicle air conditioner comprising a. The method of claim 1, g) repeating steps a) to e) for each target feedback potential value m between the ground potential value Sensor Gnd, g and the reference potential value Ref, r. Actuator error correction method of a vehicle air conditioner characterized in that. The method of claim 1, The step e) further includes the steps of detecting and storing the error a when the actuator is rotated forward and the error b when the actuator is reversely rotated, respectively. Actuator error correction method of harmonics.

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