JPH0236331A - Rough road travel testing machine and its controller - Google Patents

Abstract

PURPOSE:To conduct a test corresponding to a rough road being in a desired condition by providing plural kinds of irregular parts for simulating rough roads differing in extent on the same rotary drum. CONSTITUTION:The outer peripheral surface of the rotary drum is sectioned into plural areas on an imaginary surface perpendicular to the axis Y-Y and irregular members 3a - 3c for simulating rough roads of light, intermediate, and heavy conditions, respectively are fixed in the sectioned areas. Then tires 6 of a vehicle to be tested are put on the member 3a and a travel test is conducted under the condition of the rough road of light extent. Further, when tires 6' is placed on the member 3c, the travel test is conducted under the condition of the rough road of heavy extent. Thus, the test corresponding to a rough road being in the desired condition is conducted.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides an improved rough road running test machine that is capable of testing a vehicle on multiple types of rough roads, and This invention relates to a control method created to automatically perform combined program operations.

[Conventional technology]

Conventionally, rough road running testing machines for automobiles generally have a plurality of rotating drums on which test objects, such as automobile tires, are placed and rotated. This is a structure in which a rotary drum is rotated while rotating the wheels, thereby imparting rotation to the automobile tires and vibration to the automobile. This tests ride comfort, durability, etc. when driving on rough roads.6 Figure 5 shows the general configuration of a rough road driving tester, and A is a car as the object to be tested.

Rotating drum 1. 2 is rotated by a driving means (not shown) of the testing machine.

An uneven member 3 is attached to the outer periphery of the rotating drums 1 and 2 to simulate the :@ road conditions.

The tires 6.7 of the test vehicle A are placed on the rotating drums 1 and 2 to which the uneven members described in "2" are attached.

In order to keep the vehicle A under test tied to the position shown, it is tied to the bogies 10', +1' by ropes 12.13.

The above-mentioned bogies to' and 1.1' are guided by guide rails 8' and 9', respectively, which are perpendicular to the plane of the paper. Therefore, the test vehicle A is moved in the left-right direction (tl
It is in a state where it is restrained in the front and rear directions (with respect to the traveling direction of the L), and can be moved in the direction perpendicular to the plane of the paper (in the left and right directions with respect to the vehicle traveling direction).

As a technique for automatically conducting continuous tests using such a JR road test machine, there is a well-known technique disclosed in Japanese Patent Application Laid-Open No. 52-79401 titled ``Steering device for test vehicle in rough road test.''

According to the above-mentioned known technology, a platform using a rough road running test machine -
In the L test, a rough road driving test can be performed under conditions close to actual driving conditions.

During the above-mentioned rough road driving test, a bollard was installed that was guided by guide rails installed in the left and right directions in front and behind the vehicle under test, and the bogie and the body of the vehicle under test were connected with a rope. Ru.

[Problem to be solved by the invention]

According to the conventional technology described above, it is possible to continuously test a vehicle on rough roads unattended for several tens of hours or more.

However, the above-mentioned rough road driving test is conducted continuously under certain conditions, and it is not easy to change the degree of rough road.

The irregularities provided on the outer periphery of the rotating drum are designed to simulate set test conditions.

Therefore, if we were to standardize the degree of rough roads into heavy, medium, and light, if we tried to change the rough road test conditions between heavy, medium, and light, we would have to replace the rotating drum, which would require a large amount of work. It takes time and effort.

Generally, a structure for providing unevenness around a rotating drum is such that a segment-shaped uneven member having unevenness is attached to the outer periphery of a regular cylindrical drum with bolts. Therefore, changing the rough road conditions requires replacing a large number of uneven segments, requiring a large amount of labor cost (for example, 2 people x 2 days), and during this time, the test is interrupted and the test completion time is delayed.

The present invention has been made in view of the above-mentioned circumstances, and the first invention is that it has the same size, the same weight, and the same manufacturing cost as the conventional rough road running test machine. The purpose is to provide a rough road running test machine that can be switched to multiple rough road conditions.

A second object of the present invention is to provide a control device that can automatically switch between a plurality of rough road conditions according to a program when using the rough road test machine described above.

[Means to solve the problem]

In order to achieve the above object, the first invention divides the outer circumferential surface of the rotating drum into a plurality of sliced parts (however,
(It means to think about it separately at the design thinking stage, not to cut or divide the actual parts.)

Each of the divided outer circumferential surfaces is provided with irregularities simulating rough roads of different degrees, such as heavy, medium, and light.

Next, it is more difficult than one might imagine to place a tire on a desired portion of the heavy, medium, and light unevenness sections.

The present inventors conducted an experiment in which the test subject operated the steering wheel to place the tire on a desired uneven surface, and also moved the aforementioned bollard bogie left and right, and moved the vehicle body left and right via the connecting rope. We repeated experiments to induce this, but none of them yielded satisfactory results.

As a result of various experiments, it was confirmed that only by linking the above-mentioned guidance by the trolley and the handle operation, it was possible to reliably and smoothly switch.

The second invention was made based on the above experimental results, and while steering the test vehicle by applying the known technique (Japanese Unexamined Patent Publication No. 52-79401), the above-mentioned bogie 10' (No. (Fig. 5) is driven left and right with respect to the traveling direction of the vehicle, and the above-mentioned steering is linked to this left and right drive.

As a specific configuration for performing this interlocking, the second invention includes: (a) a steering angle detector that detects the steering angle of a vehicle as a test object; and (b) a lateral position of the vehicle body. (c) a vehicle position detector that detects the position of the vehicle;
(d) a bogie position detector that detects the lateral position of the bogie, and (e) rotating a steering wheel of the vehicle in response to a command signal; and a steering drive means for driving.

(f) providing a car stopper driving means for driving the car stopper to any position in the left-right direction; and (g) comparing the output signal of the car position detector and the output signal of the vehicle position detector. , a servo driver comprising an automatic calculator is provided which provides a command signal to the steering drive means in a direction to reduce the difference.

[Effect]

According to the configuration of the first aspect of the invention, since a plurality of types of unevenness simulating different degrees of rough roads are provided on the same rotating drum, the tires of the test vehicle are placed on a rough road of a desired degree. When placed on an uneven surface corresponding to , a test corresponding to a desired degree of rough road can be performed. This switching of the degree of rough road can be done quickly and easily since there is no need to replace the rotating drum or the uneven member.

According to the configuration of the second aspect of the invention, while guiding the vehicle under test to the left and right by driving the bollard bogie to the left and right via the coupling device (for example, a rope), the state of the vehicle body following the guidance is detected. , since the steering is performed in a direction that reduces the following delay amount (the difference between the bogie position detection signal and the vehicle 5 position detection signal).
It is possible to smoothly and reliably change the tires of the test vehicle over the unevenness of the desired rough road conditions.

〔Example〕

FIG. 2 shows an embodiment of the rough road running test machine according to the first invention, and is a cross-sectional view of the vicinity of the rotating drum 1.

YY represents the precision of the rotating drum 1.

The outer circumferential surface of the rotating drum 1 is divided into a plurality of areas by an imaginary plane (not shown) perpendicular to the axis Y-Y, and a slightly rough road is simulated on each of the divided areas. An uneven member 3a that simulates a moderately rough road, an uneven member 3b that simulates a moderately rough road, and an uneven member 3c that simulates a severely rough road are attached.

The tire 6 of the test vehicle is attached to the uneven member 3 as shown by the solid line.
When placed on the vehicle a, a driving test is conducted under mildly rough road conditions.

Also, as shown in the chain line of the tire 6', the uneven member 3c is
If you put it on the second stage, a driving test will be conducted under severe rough road conditions.

FIG. 1 shows an embodiment of the rough road running test machine according to the second invention, and is a schematic plan view with an outline of the control system added.

Reference numerals 1 and 2 in the figure are rotating drums, which are provided with uneven members (not shown in FIG. 1) for multiple types of rough road conditions, as explained with reference to FIG. , is rotationally driven by a driving means (not shown).

Reference numeral 8.9 denotes a guide rail, which corresponds to the guide rails 8 and 9 in FIG. 5 (conventional example).

The car stoppers 10a and 10b are connected by a rod 14 to form an integral structure, and a rope 12a serves as a connecting tool.

1.2b, it is connected to the body of test vehicle A.

The bogies 11a and Ilb are similarly connected by a rod 15, and connected to the body of the test vehicle A by lobes 13a and 14a.

The steering wheel 20 of the test vehicle A is remotely controlled by a servo motor cylinder 22 via a connector 21 .

The servo motor cylinder 22 has a structure that is controlled by a command signal 23a. Above handle 20. Connector 21. The servo motor cylinder 22 is a component to which the above-mentioned known technology (Japanese Patent Laid-Open No. 52-79401) is applied,
The steering wheel 20 is steered in accordance with the command signal 23a.

The bogies 10a and 11a are driven in the left and right direction of the vehicle body by electric motor cylinders 16 and 17, respectively, and their positions are controlled by limit switches +9a and 19b.

Detected at 19c.

The stroke of the electric motor cylinders 16, 17 is detected by the potentiometer 18, and a vehicle position command is issued from the potentiometer 18.

A steering angle detector 24 for detecting the steering angle is attached to the servo motor cylinder 22.

A vehicle position detector 25 for detecting the left-right position of the vehicle body is attached to the test vehicle A.

FIG. 3 is an explanatory diagram of the left and right movement of the vehicle under test, and FIG. 4 is an explanatory diagram of the operation.

When a rough road position command signal is given, the front bollards 10a, 10b and the rear bogie lLa shown in FIG.
, llb move in the left-right direction of the vehicle body so that the tires of test vehicle A are placed on the predetermined uneven members.

Due to the movement of the car stop carts 10a and 10b, a vehicle position command signal from the potentiometer 8 is input to the servo driver 23.

The servo driver 23 issues a command signal 23a and operates the servo motor cylinder 22 to rotate the handle 20 in a direction that follows the moving direction of the bogies 10a and 10b.

For convenience of explanation, an example of operation will be explained assuming the following situation.

It is assumed that FIG. 2 is drawn as the vehicle body is viewed from the rear to the front, and the tire 6 riding on the uneven member 3a is transferred to the position 6' on the uneven member 3c.

Operation shall be started from a state where this test machine is at rest.

In FIG. 4, in flow 48, the rough road position command signal 3c'
is given, the bollard 10a (integrated with 10b) and the bollard 11a (integrated with 11b) move to the right (Flow 4b) At the same time, the rotating drums 1 and 2 begin to rotate (Flow 4b). 4
c) Since the movement of the car stopper truck is performed by the operation of the electric motor cylinder 16, the vehicle position command signal from the potentiometer 18 attached thereto is sent to the servo driver 23.
(Flow 4d).

The servo driver 22 gives a command signal 23a (see FIGS. 1 and 3) to the servo motor cylinder 22 to operate the handle 2.
0 to the right (flow 4e).

As a result, the vehicle body A moves to the right. (Flow 4f) In the above steering, as shown in FIG. 1, the vehicle position command signal of the potentiometer 18, which is a bogie position detector, and the output signal of the vehicle position detector 25 are compared, and the difference is reduced. done in the direction.

When the vehicle body A reaches a position where it rests on a predetermined uneven member (in this example, 3c), the limit switch 19c is activated (flow 4g), stopping the bogie and returning the steering wheel to neutral (straight running state) (flow 4h). ).

As a result, the tire 6.7 remains positioned on the uneven member 3C (flow 41).

[Effects of the Invention] As explained above, the rough road running test machine according to the first invention is provided with a plurality of degrees of unevenness that simulates a plurality of degrees of rough road. Test conditions can be changed without interruption.

Further, the rough road running test machine control device according to the second invention is applied to the rough road running test machine provided with a plurality of types of unevenness as described above, and is applicable to the left and right movement of the bollard holding the vehicle body. Since the system is configured to follow the steering wheel steering, it is possible to automatically switch test conditions related to rough roads smoothly and reliably, making it suitable for conducting long-term driving tests on rough roads according to a predetermined program. .

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of the rough road running test machine control device of the present invention, and is a plan view with an outline of the control system added. FIG. 2 shows an embodiment of the rough road running test machine of the present invention,
FIG. 3 is a sectional view of the vicinity of the rotating drum. Figure 3 shows the left and right ears of the vehicle in the embodiment shown in Figure 1.
．． 8', 9.9'...Guide rail, 10a. 10b, lla, 1lb-cart truck, 12a,
12b, L3a. L3b・Lobe as a connecting tool, 14.15... Connecting lot of car stopper truck, 19a, 19b, 19c...
・Limit switch・Representative Patent Attorney Tadashi Akimoto Minoru 3c...Concave and convex members with different degrees, 6.6', 7...R Irregularities) Collection diagram

Claims (1)

[Claims] 1. It has a plurality of rotating drums that rotate with automobile tires as test objects placed thereon, and an uneven surface is provided on the outer periphery of the rotating drum, and the automobile tires are brought into contact with the uneven surfaces. In a rough road running test machine having a structure in which a rotary drum is rotated while giving rotation to a car tire and vibration is applied to the car, the outer circumferential surface of the rotary drum is divided into a plurality of zones in the axial direction of the drum. A rough road running test machine characterized in that each of the plurality of divided areas is provided with unevenness of different degrees. 2. Driving on a rough road where the outer circumferential surface of a rotating drum on which a test object, an automobile tire, is mounted is divided into multiple areas in the direction of the drum axis, and each of these multiple areas is provided with unevenness of varying degrees. A control device for a test machine, comprising: (a) a steering angle detector that detects the steering angle of an automobile as a test object; (b) a vehicle position detector that detects the left-right position of the automobile body; (c) a bogie that is connected to the vehicle body by a coupling and is driven in the left-right direction of the vehicle; (d) a bogie position detector that detects the position of the bogie in the left-right direction; and (e) a command. (f) a steering wheel driving means for driving the steering wheel of the automobile to rotate in response to a signal; (f) a wheel stopper driving means for driving the wheel stopper truck to an arbitrary position in the left-right direction; and (g) the above-mentioned A servo driver comprising an automatic calculator is provided which compares the output signal of the bogie position detector and the output signal of the vehicle position detector and provides a command signal to the steering drive means in a direction to reduce the difference. A control device for a rough road test machine.