JPS6046444A - Random wave generator - Google Patents
Random wave generatorInfo
- Publication number
- JPS6046444A JPS6046444A JP58155231A JP15523183A JPS6046444A JP S6046444 A JPS6046444 A JP S6046444A JP 58155231 A JP58155231 A JP 58155231A JP 15523183 A JP15523183 A JP 15523183A JP S6046444 A JPS6046444 A JP S6046444A
- Authority
- JP
- Japan
- Prior art keywords
- frequency distribution
- generated
- random number
- waveform
- random
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
- H03K3/84—Generating pulses having a predetermined statistical distribution of a parameter, e.g. random pulse generators
Landscapes
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
Description
【発明の詳細な説明】
（イ）産業上の利用分野
本発明はランダム波を発生する装置に関し、例えば材料
試験機の負荷波等を発生するのに適したランダム波発生
装置に関する。DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention relates to a random wave generating device, and relates to a random wave generating device suitable for, for example, generating a load wave of a material testing machine.
（ロ）従来技術
一般に、材料試験においては、被試験体への負荷条件を
実際の環境に近づける為に、負荷量とその出現確率を試
験に反映させる必要のある場合がある。その場合、負荷
量の頻度分布を作成し、試験の実行に当っては負荷の付
与回数によらず常にその頻度分布を満足していなければ
ならない。このような試験を行う場合、従来技術によれ
ば、作成された頻度分布に基づいて、発生すべき負荷波
の１波毎にその負荷量（振巾）を記憶装置に入力してお
く必要があった。通常、このような試験では、発生波数
が膨大な量となるので、莫大な記憶容量と多大な労力を
必要としていた。更に、負荷波の発生順序を完全にラン
ダムに設定することも困難であった。(b) Prior Art In general, in material testing, it is sometimes necessary to reflect the load amount and its appearance probability in the test in order to bring the load conditions on the test object closer to the actual environment. In that case, a frequency distribution of the load amount must be created, and the frequency distribution must always be satisfied during test execution, regardless of the number of times the load is applied. When conducting such a test, according to the prior art, it is necessary to input the load amount (amplitude) for each load wave to be generated into a storage device based on the created frequency distribution. there were. Normally, such a test requires a huge amount of storage capacity and a lot of effort because the number of generated waves is huge. Furthermore, it is also difficult to set the generation order of load waves completely at random.
（ハ）目的
本発明は上記に鑑みてなされたもので、発生波形に関す
る物理量（振巾、周期等）の頻度分布が決まれば、その
分布を記憶装置に入力しておくだけで、その頻度分布に
基づくランダムな波形を発生することができ、上述の如
き材料試験の為の負荷波等を発生するのに適したランダ
ム波発生装置の提供を目的としている。(C) Purpose The present invention has been made in view of the above, and is such that once the frequency distribution of physical quantities (width, period, etc.) related to the generated waveform is determined, the frequency distribution can be changed by simply inputting the distribution into a storage device. The object of the present invention is to provide a random wave generator that can generate random waveforms based on , and is suitable for generating load waves and the like for material testing as described above.
（ニ）構成
本発明の構成を第１図に示す機能ブロック図に基づいて
説明する。(d) Configuration The configuration of the present invention will be explained based on the functional block diagram shown in FIG.
乱数発生手段１は所定領域の乱数を発生する。Random number generating means 1 generates random numbers in a predetermined area.
頻度分布記憶手段２は、あらかじめ設定される発生ずべ
き波形に関する物理量の頻度分布を、各物理量の度数に
比例した領域を持ち、かつ、互いに連続する数直線上の
数値バンドで記憶する。規格化手段３は、乱数発生手段
ｌにより発生される乱数の領域と、頻度分布記憶手段２
における数値バンドの金領域とを一致されることにより
、互いの規格化を行う。波形発生手段４は、乱数発生手
段ｌによって発生された乱数の属する頻度分布記憶手段
２の数値バンドに対応する物理量を有する波形を発生す
る。The frequency distribution storage means 2 stores the frequency distribution of physical quantities related to waveforms that should be generated, which are set in advance, as numerical bands on a number line that have areas proportional to the frequencies of each physical quantity and that are continuous to each other. The normalization means 3 stores the area of random numbers generated by the random number generation means 1 and the frequency distribution storage means 2.
By matching the gold region of the numerical band in , mutual normalization is performed. The waveform generation means 4 generates a waveform having a physical quantity corresponding to the numerical band of the frequency distribution storage means 2 to which the random number generated by the random number generation means 1 belongs.
（ホ）実施例 以下、図面に基づいて本発明実施例を説明する。(e) Examples Embodiments of the present invention will be described below based on the drawings.
第２図は本発明実施例の構成を示すブロック図である。FIG. 2 is a block diagram showing the configuration of an embodiment of the present invention.
この実施例においては、材料試験機によって供試体にあ
らかじめ設定された頻度分布に沿うランダムな負荷を加
える場合の加力波を発生する例について述べる。従って
、波形に関する物理量としては、波形の振１ｊを採用し
ている。In this embodiment, an example will be described in which force waves are generated when a random load is applied to a specimen according to a preset frequency distribution using a material testing machine. Therefore, the amplitude 1j of the waveform is used as the physical quantity related to the waveform.
波形発生器１１は、コンピュータ１２から発生される振
巾データが到来するごとに、その振ｒｌＪを持ち、かつ
、あらかじめ設定された形状の波形を１サイクル分発生
して材料試験機１３に供給する。Each time the amplitude data generated from the computer 12 arrives, the waveform generator 11 generates one cycle of a waveform having the amplitude rlJ and a preset shape and supplies it to the material testing machine 13. .
コンピュータ１２は後述するプログラムに従って、順次
所定の領域（値域）の乱数を発生し、その乱数の値とメ
モリ１４の記憶内容とから、波形発生器１１に供給すべ
き振巾データ（負荷量σ）を決定する。メモリ１４には
、あらかじめ供試体に加えるべき負荷量σとその確率ｐ
を次のようなデータフォーマントで記憶させておく。す
なわち、第３図（ａ）に負荷量σの頻度分図を示す如く
、加えるべき負荷量σｉ （ｉ＝ｌ〜ｎ）に対応する確
立がそれぞれｐｉ （ｉ＝１〜ｎ）であったとする。ま
た、発生される乱数の領域が０〜ａ （実数）としたと
き、
ｃ−：ｐ ｉ＝ａ・−・（１１
として、各確率ｐｉをＣなる係数によって規格化し、第
３図（ｂ）に示す如く、０〜ａなる数値線上に各確率ｐ
ｉをそれぞれｂト１〜ｂｉなる領域を有する数値バンド
に比例配分して記憶させておぐ。The computer 12 sequentially generates random numbers in a predetermined range (value range) according to a program to be described later, and generates amplitude data (load amount σ) to be supplied to the waveform generator 11 from the value of the random number and the contents stored in the memory 14. Determine. The memory 14 stores in advance the amount of load σ to be applied to the specimen and its probability p.
is stored in the following data format. That is, as shown in the frequency division diagram of the load amount σ in Fig. 3(a), assume that the probabilities corresponding to the load amounts σi (i=l to n) to be added are pi (i=1 to n), respectively. . Furthermore, when the range of random numbers to be generated is 0 to a (real numbers), each probability pi is normalized by a coefficient C, as shown in Fig. 3(b). As shown in , each probability p is on the numerical line from 0 to a.
i is proportionally distributed and stored in numerical bands each having an area of b to 1 to bi.
より一般的に記すと、加えるべき負荷量σの確率密度関
数をｆ （ａｌ、発生される乱数の領域を０〜ａとした
とき、各確率ｐｉを規格化する為の係数Ｃは、
でめることができ、また、各確率ｐｉの数値バンドの領
域（ｂ ｉ−ｂ ｉ−＋）は
（ｂ ｉ −ｂ １−ｌ） ＝ ｃ−ｐ １−４３）に
よってめることができる。More generally, the probability density function of the load amount σ to be added is f (al, and when the range of generated random numbers is 0 to a, the coefficient C for normalizing each probability pi is Moreover, the area (b i-b i-+) of the numerical band of each probability pi can be determined by (b i -b 1-l) = c-p 1-43).
次に作用を述べる。第４図は本発明実施例のコンピュー
タ１２に書き込まれたプログラムを示すフローチャート
である。Next, we will discuss the effect. FIG. 4 is a flowchart showing a program written in the computer 12 according to the embodiment of the present invention.
試験に先立ち、メモリ１４に上述のフォーマットで供試
体に加えるべき負荷量σの頻度分布が記憶されているも
のとする。また、負荷の付与回数Ｎを設定しておく。更
に波形の形状や周期も前もって設定しておく。It is assumed that, prior to the test, the frequency distribution of the load amount σ to be applied to the specimen is stored in the memory 14 in the above-described format. Further, the number of times N of load application is set is set. Furthermore, the shape and period of the waveform are also set in advance.
試験の開始を指令すると、乱数が発生され、その発生さ
れた乱数の値が上述のどの数値バンドに属しているかに
より、対応する負荷量σが決定される。すなわち、発生
された乱数Ｘが例えばｂ ｉ−Ｋ ｘ≦ｂｉであれば負
荷量はσｉと決定される。そしてその決定された負荷量
σが振ｉｊデータとして波形発生器１１に出力され、材
料試験機１３にそのデータに基づく振巾の波形が供給さ
れる。When the start of the test is commanded, a random number is generated, and the corresponding load amount σ is determined depending on which numerical band mentioned above the value of the generated random number belongs to. That is, if the generated random number X satisfies, for example, b i-K x≦bi, the load amount is determined to be σi. Then, the determined load amount σ is outputted to the waveform generator 11 as amplitude ij data, and a waveform having an amplitude based on the data is supplied to the material testing machine 13.
そして波形発生回数がＮに達した時点で駆動が停止され
る。The drive is then stopped when the number of waveform occurrences reaches N.
以上の実施例では、波形に関する物理量として波形振巾
を採用したが、波形に関する他の物理量、例えば周期を
ランダムに変化させたいときには、同様な方法でその頻
度分布を記憶させることにより、ランダムな周期の波形
を発生させることもできる。In the above embodiments, the waveform amplitude was used as a physical quantity related to the waveform, but if you want to randomly change other physical quantities related to the waveform, such as the period, you can change the random period by storing the frequency distribution in a similar manner. It is also possible to generate a waveform of
（へ）効果
以上説明したように、本発明によれば、ランダムな振巾
等の物理量を持つ波形が、その物理量の頻度分布をメモ
リに記憶させておくだけで次々と発生され、従来のよう
に１波ごとにその発生順序を割りつけて入力しておく必
要がなく、メモリの記憶容量を極めて少くすることがで
きるとともに、入力作業が著しく軽減される。しかも、
発生される波形の物理量は、乱数に基づいている為、そ
の発生順序は完全にランダムとなり、従って、発生回数
を任意に選定しても常に設定された頻度分布を満足して
いる。(f) Effects As explained above, according to the present invention, waveforms having physical quantities such as random amplitudes can be generated one after another simply by storing the frequency distribution of the physical quantities in memory, unlike conventional waveforms. There is no need to allocate and input the generation order for each wave, and the storage capacity of the memory can be extremely reduced, and the input work is significantly reduced. Moreover,
Since the physical quantities of the generated waveforms are based on random numbers, the order in which they are generated is completely random. Therefore, even if the number of occurrences is arbitrarily selected, it always satisfies the set frequency distribution.
第１図は本発明の構成を示す機能ブロック図、第２図は
本発明実施例の構成を示すブロック図、第３図はそのメ
モリ１４における頻度分布の記憶フォーマットの説明図
、第４図は本発明実施例のコンピュータ１２のプログラ
ムを示すフローチャートである。
１１−・−波形発生器 １２・−コンピュータ１３−材
料試験機 １４・−メモリFIG. 1 is a functional block diagram showing the configuration of the present invention, FIG. 2 is a block diagram showing the configuration of an embodiment of the present invention, FIG. 3 is an explanatory diagram of the storage format of the frequency distribution in the memory 14, and FIG. 3 is a flowchart showing a program of the computer 12 according to an embodiment of the present invention. 11--Waveform generator 12--Computer 13-Material testing machine 14--Memory
Claims (1)
分布を、各物理量の度数に比例した領域を有する数値バ
ンドの連続で記憶する頻度分布記憶手段と、上記乱数発
生手段により発生される乱数の領域と上記頻度分布記憶
手段における上記数値バンドの全領域とを一致させる規
格化手段と、発生された上記乱数の属する上記数値バン
ドに対応する物理量の波形を発生する波形発生手段とを
備えたランダム波発生装置。random number generation means; frequency distribution storage means for storing a frequency distribution of physical quantities regarding a waveform to be generated as a series of numerical bands having an area proportional to the frequency of each physical quantity; and an area of random numbers generated by the random number generation means. and a waveform generating means for generating a waveform of a physical quantity corresponding to the numerical band to which the generated random number belongs. Generator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58155231A JPS6046444A (en) | 1983-08-24 | 1983-08-24 | Random wave generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58155231A JPS6046444A (en) | 1983-08-24 | 1983-08-24 | Random wave generator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6046444A true JPS6046444A (en) | 1985-03-13 |
| JPH0527058B2 JPH0527058B2 (en) | 1993-04-20 |
Family
ID=15601394
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58155231A Granted JPS6046444A (en) | 1983-08-24 | 1983-08-24 | Random wave generator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6046444A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5310472A (en) * | 1976-07-16 | 1978-01-30 | Mitsubishi Jishiyo Kk | Branched clock automatic adjusting device |
| JPS5716685A (en) * | 1980-05-26 | 1982-01-28 | Gd Spa | Machine for two continuous tobacco rods simultaneously |
-
1983
- 1983-08-24 JP JP58155231A patent/JPS6046444A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5310472A (en) * | 1976-07-16 | 1978-01-30 | Mitsubishi Jishiyo Kk | Branched clock automatic adjusting device |
| JPS5716685A (en) * | 1980-05-26 | 1982-01-28 | Gd Spa | Machine for two continuous tobacco rods simultaneously |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0527058B2 (en) | 1993-04-20 |
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