JPH03239835A - Damper malfunction detecting method - Google Patents

Abstract

PURPOSE:To make it possible to apply a method temporarily only in checking by detecting the occurrence or non-occurrence of malfunction by a timelag of the correlation Rxy between the acceleration, speed or displacement of a vibrated structure, and drive force of the damper. CONSTITUTION:The correlation Rxy between the acceleration, speed or displacement of a vibrated structure, and drive force by a damper is determined. The occurrence or non-occurrence of malfunction is detected by detecting the fact that when the timelag between both of them S=0, the correlation Rxy mentioned above is deviated to the plus side or minus side and/or whether the timelag S corresponding to the minimum value on the minus side of correlation Rxy large or small. Thus, the method can be applied temporarily only in checking at a low cost.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for detecting malfunction of a vibration damping device used in structures and the like.

[Conventional technology]

Conventionally, two control circuits were used to detect malfunctions of vibration damping devices.
If a series or three series are provided in parallel and one of them issues a different command, it is determined to be a failure, or the command is adopted by majority vote.

[Problem to be solved by the invention]

However, all of these methods are uneconomical as they increase costs.

An object of the present invention is to provide an economical vibration damping device malfunction detection method that can be put into practical use temporarily only during inspections, instead of being proposed in view of the above circumstances.

[Means to solve the problem]

To this end, the present invention aims to reduce the acceleration of a structure to be damped.

Correlation R between speed or displacement and driving force by vibration damping device
. A is determined, and whether or not a malfunction occurs due to the above correlation RXy being biased to the + side or one side at the time lag S-〇 between the two, or due to the size of the time lag S corresponding to the minimum value on one side of the correlation Rxy. It is characterized by detecting.

[Effect]

According to this configuration, it is possible to distinguish between whether the vibration damping device is moving to suppress the vibration of the target structure or whether it is moving to excite the target structure due to a computer failure, etc. I understand.

〔Example〕

The drawing shows an example in which the present invention is applied to damping puff etching vibration caused by wind speed fluctuations in a building. When not damping 17. What was Ogal,
Reduced to 7.2 gal.

However, if the performance of the damping device deteriorates slightly, the minimum value of the building acceleration will be 11.1 ga, as shown in Figure 2.
It is l.

If the vibration damping device malfunctions and instead acts as a vibration exciter, the maximum building acceleration will be 19.1 gal, compared to 17.1 gal when vibration damping is not performed. Increases compared to Ogal.

Looking at the correlation R, y at time lag (S) = O, in Figure 1 it is R,,'4-0.75, and in Figure 2 it is R8 a#-.
o, ts, in Figure 3 R11, which is 0.5, S = 0
If the correlation becomes positive, it can be determined that the state of the device has become abnormal.

In addition, the time lag (S
) in Figure 1, S#0.0, in Figure 2, S' = -1.0sec, and in Figure 3, S#3.5sec.
In this example, S = −1,5 to −2,0 sec
If the following occurs, it can be determined that an abnormality has occurred in the device.

The only equipment required to implement the above method is a pick amplifier to detect vibrations in the building, a motor torque meter, and an analyzer, so these devices do not need to be installed permanently and are set only during inspections. Even if there are multiple vibration damping devices, inspection can be done with just 1M of damping devices, making it inexpensive.

Furthermore, since the method of the present invention is an independent inspection method that is completely separate from the control circuit, it is highly safe.

〔Effect of the invention〕

In short, according to the present invention, the correlation RII between the acceleration, velocity, or displacement of the structure to be damped and the driving force by the damping device
, and a malfunction occurs due to the above correlation RIly biasing to the + side or one side at the time lag S-〇 between the two, or due to the size of the time lag S corresponding to the minimum value on one side of the correlation Ryo. By detecting the presence or absence of
The present invention is industrially extremely useful because it provides an economical method for detecting vibration damping device malfunctions that is inexpensive and can be temporarily installed only during inspections without having to permanently install the device.

[Brief explanation of drawings]

Figure 1 shows an example of applying the present invention to damping puff etching vibrations caused by wind speed fluctuations in a building, and is a diagram showing the normal relationship between building acceleration and motor torque. FIG. 1a shows a case where the performance is slightly degraded, and FIG. 3 shows a diagram when the vibration damping device operates abnormally. Figure 1 - (3) Figure 2

Claims (1)

[Claims] The correlation R_x_y between the acceleration, velocity, or displacement of the structure to be damped and the driving force by the damping device is determined, and when the time lag between the two is S=0, the correlation R_x_y is biased toward the + side or the - side. Alternatively, a method for detecting malfunction of a damping device, characterized in that the presence or absence of a malfunction is detected based on the magnitude of a time lag S corresponding to a local minimum value on one side of the correlation R_x_y.