JPH0688768A - Controlling method for driving test device - Google Patents

Abstract

PURPOSE:To contrive highly accurate high-speed control for an electric motor so as to stabilize the testing environment, shorten the testing time for specimen, and improve the maintainability. CONSTITUTION:After the rpm of an electric motor 6 is counted by a counter circuit 10, the result is sent to a host computer 1 and the host computer 1 sends a speed reference value 2 and a speed feedback value 11 to a sequencer 3. The sequencer 3 sends to an analog thyristor 5 a speed reference value 4 based on a deviation amount between the speed reference value and the speed feedback value 11 and controls the electric motor 6 to rotate at a specified rpm.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control system of a drive test device used for test-driving a test object such as an automobile automatic transmission.

[0002]

2. Description of the Related Art FIG. 5 is a block diagram of a conventional drive test apparatus. In FIG. 5, 6 is an electric motor for driving a test object such as an automatic transmission, 5 is an analog thyristor as a drive means for driving the electric motor 3, 3 is a sequencer as drive management means for driving and managing the analog thyristor 5, and 1 is a supply It is a high-order computer as a production management means for controlling the sequencer 3 for each model of the sample 7 and performing production management with the operation pattern and the standard value preset for each model. 2 is a speed reference value given from the host computer 1 to the sequencer 3, and 4 is the sequencer 3 to the analog thyristor 5.
8 is a speed feedback signal (set speed) given to the speed feedback signal from the electric motor 6.

FIG. 6 is a block diagram of the sequencer 3,
In FIG. 6, reference numeral 9 is a limiter circuit for limiting the speed reference value 2 and outputting the speed reference value 4.

FIG. 7 is a diagram for explaining an operation pattern and a standard value in a test of an automobile automatic transmission. In FIG. 7, the horizontal axis represents time and the vertical axis represents the rotation speed n of the electric motor 4. In step n, the transmission gear ratio is the third speed, and in steps n + 1, n + 2, n + 3 and n + 4, the transmission gear ratio is the fourth speed.
As shown by 1. The standard value has a standard value upper limit 72 and a standard value lower limit 74 as shown in FIG. 7, and when the data (reference standard value) indicated by line 73 is larger than the standard value lower limit 74 and smaller than the standard value upper limit 72, The auto transmission being tested is a good product. As described above, what elements (data) of the automatic transmission are extracted as a result of driving the automatic transmission with the electric motor 6 are, for example, a gear ratio, various hydraulic pressures (line pressure, cooler pressure, etc.),
Extract the drag torque in the neutral range.
In an actual automobile, if the vehicle starts when the accelerator is fully depressed in the neutral range, the auto transmission is defective. This device measures this phenomenon by torque.

Next, the operation of this conventional example will be described.
The applicable operation pattern and standard value for the auto transmission (test object 7) in which test operation is performed are downloaded from the host computer 1 to the sequencer 3, and the sequencer 3 which receives this downloads the speed reference value 4, acceleration rate, deceleration rate, etc. Is output to the analog thyristor 5 that drives the electric motor 6. On the analog thyristor 5 side, the speed feedback signal 8 from the electric motor 6 is monitored based on the speed reference value 4 received from the sequencer 3 and control is performed so as to reach the set speed. Especially, the drag torque measurement at the neutral position of the auto transmission is
It is indispensable for the inspection items, and it is essential that the rotation of the electric motor 6 is fast and stable according to the set value, and the speed control system adjustment of the drive system analog thyristor 5 corresponds to it.

[0006]

Since the conventional drive test apparatus is constructed as described above, when the speed feedback signal of the electric motor does not reach the set speed, fine adjustment in the speed control system of the analog thyristor of the drive system is performed. However, there is a problem that it takes a lot of time for fine adjustment and it is not stable due to the temperature drift of the analog thyristor. In addition, we tried automatic gain correction with a host computer, but the execution step time was very short and the set speed was reached, but the cycle time was long, and automatic gain correction is a disturbance factor unless speed feedback is stable and online. Therefore, this also has a problem that the cycle time becomes long.

The present invention has been made in order to solve the above problems, and obtains a control system for a drive test apparatus capable of stabilizing the test environment (improving the quality of the specimen) and improving the maintainability. With the goal.

[0008]

In the control system of the drive test apparatus according to the present invention, a rotation speed counting means (counter circuit 10) for counting the rotation speed of the electric motor 6 is provided, and the drive management means (sequencer 3) is provided. The counted number of revolutions is set as a speed feedback value 11, and a driving means (an analog thyristor) is used so that the number of revolutions of the electric motor 6 becomes a set number of revolutions by a deviation amount 13 between the speed feedback value 11 and a preset speed reference value 2. 5) is controlled.

[0009]

The driving means (analog thyristor 5) controls the electric motor 6 by the deviation amount 13 between the speed feedback value 11 and the speed reference value 2. As a result, the rotation speed of the electric motor 6 is controlled to reach the set rotation speed.

[0010]

【Example】

Example 1. FIG. 1 is a configuration block diagram of a drive test apparatus according to an embodiment of the present invention. In FIG. 1, components corresponding to those shown in FIG. 5 are designated by the same reference numerals, and their description will be omitted. In FIG. 1, reference numeral 10 is a counter circuit as a rotation speed counting means for counting the rotation speed of the electric motor 6. Reference numeral 11 is a speed feedback value which is output from the counter circuit 10 to the sequencer 3 after being processed by the host computer 1 and processed.

FIG. 2 is a block diagram showing the configuration of the sequencer 3. In FIG. 2, reference numeral 12 is a subtracter for obtaining a deviation amount between the speed reference value 2 and the speed feedback value 11, 1
3 is the deviation amount output from the subtractor 12, and 14 is the subtractor 1
A limiter circuit that limits the deviation amount 13 from 2, a contact signal 15 that is output when the deviation amount 13 reaches the limit value,
16 is a buffer memory for storing the deviation amount 13, 17 is a next test piece operation contact signal, 18 is a buffer memory output value, 1
Reference numeral 9 is a coefficient, and 20 is an arithmetic unit for outputting a velocity reference value (learning control reference value) 4.

FIG. 3 is a graph showing the relationship between the speed reference value 4 and the rotation speed of the electric motor 6. Control system accuracy is 100
If%, the speed reference value = rotation speed, but due to various conditions such as temperature drift, speed reference value> rotation speed,
In some cases, the speed reference value is smaller than the number of revolutions, and the deviation is corrected to the speed reference value to maintain the relation of the velocity reference value = the number of revolutions. A block diagram of the sequencer 3 for controlling the speed reference value and the rotational speed to be equal to each other is shown in FIG. 4 for reference.

Next, the operation of this embodiment will be described.
The host computer 1 gives the speed reference value 2 and the speed feedback value 11 to the sequencer 3 as digital signals. In the sequencer 3, the deviation amount 13 between the speed reference value 2 and the speed feedback value 11 is passed through the limiter circuit 14 to the buffer memory 1
Store in 6. At this time, in the limiter circuit 14, if the deviation amount 13 reaches the limit value, the limiter-on setting signal 1 is set so that the previously learned speed reference value 4 is adopted.
The analog thyristor 5 is controlled by 5. The fact that the deviation amount 13 reaches the limit value is because the control system is abnormal, and further correction thereof has an adverse effect on the control itself. Therefore, if the deviation amount 13 reaches the limit value, no further correction is performed, and thus the previously learned speed reference value 4 is adopted. However, some kind of display means that the deviation amount 13 depends on the limit value is necessary.

In the computer 20, the next test piece operation contact signal 1
The buffer memory value 18 of the buffer memory 16 according to 7
Is input, the speed reference value 2 × (coefficient 19−buffer memory value 18) ÷ coefficient 19 is calculated, and the learned speed reference value 4 is output to the analog thyristor 5. With this learning speed reference value 4, the analog thyristor 5 drives the electric motor 6 to test-drive the test piece 7. The number of rotations of the electric motor 6 is counted by the counter circuit 10 and given to the host computer 1, and the host computer 1 gives the speed reference value 2 and the speed feedback value 11 to the sequencer 3. By such feedback, the electric motor 6 is controlled to reach the set rotation speed.

According to the above embodiment, the test environment can be stabilized by constantly giving the actual rotation of the electric motor close to the learning speed reference value to the test piece. Further, since it is not necessary to repeat the fine adjustment with the potentiation of the drive system (analog thyristor) many times, the adjustment time can be shortened (the test time can be shortened) and the maintainability can be improved.

Example 2. Although the drive test device for the automobile automatic transmission has been described in the above-mentioned first embodiment, the same effect can be obtained also for the drive test device for a paper machine, a steel rolling line or the like which requires high-accuracy speed control by using an analog thyristor. Play.

[0017]

As described above, according to the present invention, the rotation speed counting means for counting the rotation speed of the electric motor is provided, and the rotation speed counted by the rotation speed counting means is used as the speed feedback value to obtain the speed feedback value. Since the rotation speed of the electric motor is controlled to be the set rotation speed by the deviation amount from the preset speed reference value, the speed reference value from the drive management means to the drive means can be learning-controlled, and The test environment can be stabilized (the quality of the test piece can be improved), the test time can be shortened, and the maintainability can be improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a drive test apparatus according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a sequencer in FIG.

FIG. 3 is a diagram showing a relationship between a reference rotation speed and an electric motor rotation speed in this embodiment.

FIG. 4 is a block diagram of a sequencer in this embodiment.

FIG. 5 is a block diagram showing a configuration of a conventional drive test apparatus.

6 is a block diagram showing a configuration of a sequencer in FIG.

FIG. 7 is a diagram for explaining an operation pattern and a standard value for an auto transmission test.

[Explanation of symbols]

 1 High-order computer (production control means) 3 Sequencer (drive control means) 5 Analog thyristor (drive means) 6 Electric motor 7 Specimen 10 Counter circuit (rotation speed counting means)

Claims (1)

[Claims] 1. An electric motor for driving a test piece, a drive means for driving the electric motor, a drive management means for driving and managing the drive means, and a model for controlling the drive management means for each model of the test piece in advance. In a drive test apparatus having a production control means for performing production control with an operation pattern and a standard value set for each, a rotation speed counting means for counting the rotation speed of the electric motor is provided, and is counted by the rotation speed counting means. The control of the drive test device is characterized in that the rotational speed of the electric motor is controlled to a set rotational speed based on a deviation amount between the speed feedback value and a preset speed reference value. method.