JP2002340734A - Method and apparatus for testing motion simulation of test model - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for testing a motion simulation of a test model which can efficiently execute the simulation of this type within a predetermined time. SOLUTION: The method for testing the moving simulation of the test model comprises a step of deciding next testing position of the test model from test data at a present position (S1). The method further comprises the steps of calling a subroutine (S2), and calculating an air force to be applied to the test model at next testing position and a deflecting amount of a supporting unit at this position from the air force. The method also comprises the steps of calculating a predicted moving position to be predicted by considering the deflection of the supporting unit by temporarily likening the next testing position as a target position, deciding necessity or not of a correction of the target position in the case of moving the model by judging in terms of a difference between the next testing position and the predicted moving position, acquiring the target position as a response from the subroutine when necessity of the correction is eliminated (S3), moving the model to the next testing position (S4), measuring component forces in X-, Y- and Z-axis directions and moments around these axes (S5), and deciding a new next testing position from the measured results (S1).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a test method for simulating movement of a test model supported in a wind tunnel and a test apparatus for realizing the method.

[0002]

2. Description of the Related Art For the purpose of acquiring aerodynamic characteristics exerted on an actual machine moving in the air, a movement simulation test using a test model thereof is performed in a wind tunnel. FIG. 5 shows a conventional movement simulation test apparatus 100 installed in a wind tunnel. The test apparatus 100 is a columnar apparatus that forms a streamline in the direction of air flow (the direction of the arrow in the figure). The base 102 of the slave unit 104 is supported by an arm 103 extending substantially perpendicularly to the flow direction from the base end of the base unit sting 101.
4a is attached in a direction substantially the same as the flow direction. A substantially L-shaped arm 105 extending from the base portion 104a and bent substantially perpendicularly to the flow direction is attached to a distal end portion of the base portion 104a.
5 has a structure in which a test model 106 of a load of the base unit is supported on an end 104b of the child unit sting 104 attached to the end of the base unit 5 in substantially the same direction as the flow direction.
Therefore, in the conventional test apparatus 100, the child machine sting 1 is connected to the mother machine sting 101 via the arm 103 or the like.
Due to the mode in which the 04 is connected, the structure is such that the arm 103 and the like are placed in the wind tunnel, and it is difficult to secure a sufficient movable range of the test model 106. In addition, the mother device sting 101 and the child device sting 104, etc.
A motor and the like are mounted for enabling the mother machine model 102 and the test model 106 to move in the XYZ-axis directions and rotate around these axes.

On the other hand, in a movement simulation test using a test model 106 using a conventional test apparatus 100, FIG.
As shown in the flowchart, the test position of the test model 106 in the next step is designated (step S10).
0) After that, the test model 106 moves to the test position as a target (step S101), and after waiting for the test model 106 to settle (step S102), the component force in the XYZ axis direction and the moment around these axes are calculated. After measuring (Step S103), the amount of deflection at the test position is calculated from this (Step S104). When the actual position calculated from the amount of deflection is compared with the test position (Step S105),
If it is within the predetermined deviation amount, this position is determined as the test position in the next step (step S106), but if it is outside the predetermined deviation amount, it is appropriately corrected and set as the target position (step S107). ), A method in which steps S101 to S105 and S107 are repeated until the deviation is within a predetermined amount.

[0004]

However, in the conventional test apparatus, the structure in which the arm and the like are placed in the wind tunnel obstructs the flow of air in the wind tunnel, causing a decrease in fluid velocity and turbulence of the air flow. There were areas where it was difficult to achieve accurate simulations. In addition, since the space between the two stings is not sufficient, the moving range of the test model in the simulation is limited, and the usability is poor. Further, in the above-described processing method using the conventional test apparatus, the initially specified target position is different from the true target position actually reached due to the bending of the test apparatus due to aerodynamic force. The robot moves in accordance with the above-described processing routine until the movement is reached, and the amount of bending must be calculated each time the robot moves, making it difficult to complete the simulation within a predetermined time.

[0005] It is an object of the present invention to provide a test simulation test method of a test model which can efficiently perform this kind of simulation. The object of the present invention is
It is an object of the present invention to provide a test model movement simulation test device in which an airflow in a wind tunnel is rectified in a wide portion and an accurate simulation can be realized using a wide space.

[0006]

According to a first aspect of the present invention, there is provided a test simulation method for moving a test model, the test model being supported by a support device in a wind tunnel through which air flows. In a movement simulation test method for performing a simulation, a next test position of the test model is calculated from a test result at a current test position,
Setting a target position to be moved to the next test position, calculating an aerodynamic force applied to the test model at the target position, calculating an amount of bending of the support device due to the aerodynamic force, Calculate a predicted movement position predicted to reach when the test model moves with the target position as a target by adding the amount to the target position, and the predicted movement position and the next test position are within a predetermined distance. When this happens, the test model is moved with the target position as a target.According to the present test method, the test model is moved many times until it is determined to be the next test position as in the prior art. Since it is possible to move to the target position without the complexity of having to calculate the amount of deflection each time, this kind of simulation can be performed efficiently within a predetermined time.

A test model movement simulation test apparatus according to a second aspect of the present invention is a test model movement simulation test apparatus supported by a support device in a wind tunnel through which air flows, wherein the support device is provided with the wind tunnel. The cross section of the portion protruding into the inside has a substantially elliptical columnar structure having a major axis along the flow, and supports the test model on an extension axis of the major axis, inside the columnar structure and outside the wind tunnel. A moving mechanism for moving the test model,
According to such an apparatus, the usability is improved because the moving range of the test model is not limited, and an efficient simulation test can be realized because the flow of air in the wind tunnel is not hindered in a wide range.

Further, according to a third aspect of the present invention, there is provided a test simulation apparatus for moving a test model, wherein a ball screw mechanism or the like for moving the columnar structure in a direction perpendicular to a predetermined plane is provided in the columnar structure. A moving mechanism for moving the columnar structure in the plane outside the wind tunnel and below the columnar structure, such as a combination of a pair of orthogonal ball screw mechanisms. Is arranged.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a test simulation test apparatus for a test model according to the present invention and a movement simulation test method using the apparatus will be described with reference to FIGS. As shown in FIG. 1, the test apparatus A supports a mother machine support device 3 for supporting a mother machine model 2 in a wind tunnel (not shown) through which air flows, and a test model 4 independently of the mother machine support device 3. It has a child device support device 1. That is, the base unit supporting device 3 has a columnar structure having a streamlined cross section along the streamline of air (in the direction of the flow rate of the air fluid, the XX axis direction in the present embodiment). In the middle,
Base unit sting 3a protruding in the flow direction
The mother machine model 2 is supported via. Further, the child device supporting device 1 has a columnar structure in which a main body (a portion protruding into the wind tunnel) 1a has a flat cross section and a substantially elliptical shape, and its major axis is parallel to a streamline of air. On the upper part of the base 1a, the base 5a is arranged on the extension axis of the long axis, while in the present embodiment, the base 5a is bent from the base 5a into a substantially L shape.
A slave unit sting 5 that supports the test model 4 is attached to an end 5b that is parallel to a, and the slave unit support device 1 includes:
A configuration is adopted in which the test model 4 is supported independently of the parent machine support device 3 so that the moving range of the test model 4 is not limited.

In addition, in the handset supporting device 1, in addition to the above-described columnar structure of the main body 1a, the movement and the rotation of the test model 4 do not obstruct the flow of air in the wind tunnel. I have. That is, as shown in FIG. 2, the bottom plate 1b outside the wind tunnel (not shown) and on which the main body 1a is placed
A pair of ball screw mechanisms (moving mechanisms) 6 and 7 for moving the main body 1a, that is, the test model 4 in a predetermined plane formed by the XY axes (see FIG. 1) are disposed orthogonally below the main body 1a. Further, in the present embodiment, a yaw angle displacement rotation mechanism 8 for rotating the test model 4 around the Z axis (see FIG. 1) is provided on the ball screw mechanism 7, and the yaw angle displacement rotation mechanism is provided. The main body 1a is placed on the base 8 via the bottom plate 1b. As described above, the mechanisms 6 to 8 have a stacked configuration, but can be independently moved and rotated.

As shown in FIG. 2, in the child device supporting apparatus 1, a ball screw mechanism (moving mechanism) 9 is provided in the main body 1a, so that the test model 4 moves in the Z-axis direction. I have. For this reason, as shown in the figure, the main body 1a adopts a configuration in which the inner plate 1d slides with respect to the outer plate 1c fixed to the bottom plate 1b as the ball screw mechanism 9 advances and retreats. Further, in the present embodiment, as shown in FIG. 1, a pitch angle displacement rotation mechanism 10 for rotating around the Y axis is disposed above the main body 1a. Furthermore,
In the present embodiment, the roll angular displacement rotation mechanism 11 for rotating the test model 4 about the X axis is provided by the slave unit sting 5.
At the end 5b.

Next, a description will be given, with reference to the flowcharts of FIGS. However, in the subroutine of this flowchart, step S
25, a target position for reaching the predicted movement position when the difference between the next test position and the predicted movement position predicted in consideration of the bending of the support device 1 becomes equal to or smaller than a predetermined value. Processing is performed to determine the target position when the test model 4 moves. By the way, the movement command to the ball screw mechanisms 6, 7 and 9 for moving the test model 4 may be performed by the test apparatus A, or may be performed by, for example, a control device in a control room.

First, in step S1 of the main routine,
From the test data at the current position
Test position (X₀, Y₀, Z₀) Is determined. And
The subroutine is called in step S2,
Then, in step S21, the next test position (X₀, Y₀, Z
₀) Calculates the aerodynamic force applied to the test model 4 and
The amount of deflection of the support device 1 at the position from the aerodynamic force at 22
(ΔX₀, ΔY₀, ΔZ₀) Is calculated. And
In step S23, the next test position (X₀, Y ₀,
Z₀) Is temporarily assumed as the target position, and step S24 is assumed.
In the case where the support device 1 moves toward the target position,
It is predicted that the test model 4 will move further from the target position.
Predicted movement position (x₀, Y₀, Z₀) Is calculated.

In the next step S25, the next test position (X
₀, Y₀, Z₀) And the predicted movement position (x₀, Y₀, Z₀)
And the difference between the two is greater than a predetermined value.
If it is determined that the target
From the coordinate values of the position, the difference (X₀-X₀, Y₀-Y₀,
Z₀-Z₀) Minus the position (X₁, Y
₁, Z₁) As a new target position.
In step S27, a new target position (X₁, Y₁, Z₁Test with
The aerodynamic force applied to the model 4 is calculated, and in step S28,
The amount of bending of the support device 1 at the position (ΔX₁,
ΔY₁, ΔZ₁), And returns to step S24.
And the new predicted movement position (x₁, Y₁, Z ₁)
If the difference between the two is smaller than the predetermined value in the determination of step S25,
Steps S24 to S28 are repeated until it is determined. one
On the other hand, in step S25, the difference between the two is smaller than the predetermined value.
Is determined in step S29, (X_m, Y
_m, Z_m) Is determined as the target position,
In step S3 of the routine,
Obtained as an answer.

In step S3, the main routine acquires the target position for movement in response to the subroutine, and issues a movement command to the ball screw mechanisms 6, 7, and 9, thereby moving the test model 4 to the target position. (Step S4), and at the same time, the angular displacement rotation mechanisms 8, 10, 11 based on the amount of bending and the bending direction at the position.
Is issued. By the way, while driving the ball screw mechanisms 6, 7 and 9, etc., for example, the DC motor and the stepping motor are controlled in acceleration / deceleration,
Vibration countermeasures have been taken to speed up the stabilization at the moved position. Then, the test model 4 moves to the target position, and XYZ
The axial component force and the moments around these axes are measured (step S5), and a new next test position is determined in step S1 from the measurement result.

[0016]

According to the test model moving simulation test apparatus of the present invention, the usability is improved because the moving range of the test model is not restricted, and the flow of the air fluid in the wind tunnel is not hindered. According to the test model movement simulation test method of the present invention, the movement of the test model is predicted by calculating the deflection of the test apparatus before movement, and the predicted movement position is different from the next test position by a predetermined error. Since the movement is performed after matching within the range, it is possible to move to the next test position with one movement, and this kind of simulation can be efficiently performed within a predetermined time.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a simulation system including a test model movement simulation test apparatus according to an embodiment of the present invention.

FIG. 2 is a configuration diagram of a moving mechanism provided in the present test apparatus.

FIG. 3 is a flowchart of a main routine in a test model movement simulation test method according to the embodiment of the present invention.

FIG. 4 is a flowchart of a subroutine in a test model movement simulation test method according to the embodiment of the present invention.

FIG. 5 is a configuration diagram of a conventional movement simulation test device.

FIG. 6 is a flowchart of a conventional movement simulation test method.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 This test apparatus 1a Main body (The part protruded in the wind tunnel) 2 Base model 3 Base support 3a Base sting 4 Test model 5 Sub sting 5a Base (on the extended axis of a long axis) 5b End 6,7,9 Ball screw mechanism (moving mechanism)

Claims (3)

[Claims] 1. A movement simulation test method for performing a movement simulation by supporting a test model with a supporting device in a wind tunnel in which air flows, wherein a next test position of the test model is calculated from a test result at a current test position, Setting a target position to be moved to the next test position, calculating an aerodynamic force applied to the test model at the target position, calculating an amount of bending of the support device due to the aerodynamic force, Calculate a predicted movement position predicted to reach when the test model moves with the target position as a target by adding the amount to the target position, and the predicted movement position and the next test position are within a predetermined distance. And moving the test model with the target position as a target when the test model moves. 2. A movement simulation test device for a test model supported by a support device in a wind tunnel in which air flows, wherein the support device has a cross section of a portion protruding into the wind tunnel having a long axis along a flow. A columnar structure having a substantially elliptical shape, a support mechanism for supporting the test model on an extension axis of the long axis, and a moving mechanism for moving the test model inside the columnar structure and outside the wind tunnel. A test model movement simulation test apparatus characterized by the following. 3. The moving mechanism for moving the columnar structure in a direction perpendicular to a predetermined plane in the columnar structure. The moving mechanism is provided outside the wind tunnel and below the columnar structure. 3. The apparatus according to claim 2, further comprising a moving mechanism for moving the columnar structure in the plane.