State observer

State observer - system that provides an estimate of the internal state of a given real system, from measurements of the input and output of the real system. Article “State observer” in English Wikipedia has 45.9 points for quality (as of July 1, 2026). The article contains 25 references and 12 sections.

In this language version of Wikipedia the article has the best quality. Also, this article is the most popular in that (English) language version.

In June 2026 the article “State observer” was edited by 1 authors in English Wikipedia and written by 2 authors in all languages.

Since the creation of article “State observer”, its content was written by 71 registered users of English Wikipedia and edited by 244 registered Wikipedia users in all languages.

The article is cited 79 times in English Wikipedia and cited 351 times in all languages.

The highest Authors Interest rank from 2001:

• Local (English): #34625 in January 2021
• Global: #60318 in February 2007

The highest popularity rank from 2008:

• Local (English): #210482 in December 2014
• Global: #205282 in December 2014

There are 12 language versions for this article in the WikiRank database (of the considered 55 Wikipedia language editions).

The quality and popularity assessment was based on Wikipédia dumps from July 1, 2026 (including revision history and pageviews for previous years).

The table below shows the language versions of the article with the highest quality.

#	Language	Quality grade	Quality score
1	English (en) State observer		45.9298
2	Chinese (zh) 狀態觀測器		44.0165
3	Korean (ko) 상태 관측기		33.5884
4	German (de) Beobachter (Regelungstechnik)		28.8882
5	French (fr) Observateur d'état		23.5749
6	Arabic (ar) ملاحظ الحالة		21.015
7	Russian (ru) Наблюдатель (динамические системы)		11.7676
8	Italian (it) Osservatore dello stato		10.4817
9	Polish (pl) Obserwator stanu		10.4468
10	Hindi (hi) अवस्था प्रेक्षक		4.7509

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The following table shows the most popular language versions of the article.

The most popular language versions of the article "State observer" in all the time

#	Language	Popularity award	Relative popularity
1	English (en) State observer		702 420
2	German (de) Beobachter (Regelungstechnik)		281 660
3	French (fr) Observateur d'état		121 090
4	Polish (pl) Obserwator stanu		61 109
5	Italian (it) Osservatore dello stato		54 615
6	Russian (ru) Наблюдатель (динамические системы)		44 019
7	Chinese (zh) 狀態觀測器		28 454
8	Japanese (ja) 状態観測器		27 951
9	Arabic (ar) ملاحظ الحالة		8 920
10	Persian (fa) رؤیت‌کننده حالت		2 597

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The following table shows the language versions of the article with the highest popularity in the last month.

The most popular language versions of the article "State observer" in June 2026

#	Language	Popularity award	Relative popularity
1	English (en) State observer		2 146
2	German (de) Beobachter (Regelungstechnik)		513
3	French (fr) Observateur d'état		236
4	Chinese (zh) 狀態觀測器		196
5	Polish (pl) Obserwator stanu		169
6	Italian (it) Osservatore dello stato		151
7	Russian (ru) Наблюдатель (динамические системы)		88
8	Japanese (ja) 状態観測器		73
9	Korean (ko) 상태 관측기		25
10	Persian (fa) رؤیت‌کننده حالت		8

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The following table shows the language versions of the article with the highest Authors’ Interest.

Language versions of the article "State observer" with the highest Authors Interest (number of authors). Only registered Wikipedia users were taken into account.

#	Language	AI award	Relative AI
1	English (en) State observer		71
2	German (de) Beobachter (Regelungstechnik)		59
3	French (fr) Observateur d'état		38
4	Italian (it) Osservatore dello stato		24
5	Russian (ru) Наблюдатель (динамические системы)		22
6	Arabic (ar) ملاحظ الحالة		7
7	Polish (pl) Obserwator stanu		7
8	Hindi (hi) अवस्था प्रेक्षक		5
9	Japanese (ja) 状態観測器		4
10	Chinese (zh) 狀態觀測器		3

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The following table shows the language versions of the article with the highest Authors’ Interest in the last month.

Language versions of the article "State observer" with the highest AI in June 2026

#	Language	AI award	Relative AI
1	English (en) State observer		1
2	Italian (it) Osservatore dello stato		1
3	Arabic (ar) ملاحظ الحالة		0
4	German (de) Beobachter (Regelungstechnik)		0
5	Persian (fa) رؤیت‌کننده حالت		0
6	French (fr) Observateur d'état		0
7	Hindi (hi) अवस्था प्रेक्षक		0
8	Japanese (ja) 状態観測器		0
9	Korean (ko) 상태 관측기		0
10	Polish (pl) Obserwator stanu		0

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The following table shows the language versions of the article with the highest number of citations.

Language versions of the article "State observer" with the highest Citation Index (CI)

#	Language	CI award	Relative CI
1	English (en) State observer		79
2	Persian (fa) رؤیت‌کننده حالت		57
3	French (fr) Observateur d'état		50
4	Chinese (zh) 狀態觀測器		45
5	Polish (pl) Obserwator stanu		36
6	Japanese (ja) 状態観測器		29
7	German (de) Beobachter (Regelungstechnik)		21
8	Italian (it) Osservatore dello stato		12
9	Russian (ru) Наблюдатель (динамические системы)		10
10	Arabic (ar) ملاحظ الحالة		7

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#	Language	Value
ar	Arabic ملاحظ الحالة
de	German Beobachter (Regelungstechnik)
en	English State observer
fa	Persian رؤیت‌کننده حالت
fr	French Observateur d'état
hi	Hindi अवस्था प्रेक्षक
it	Italian Osservatore dello stato
ja	Japanese 状態観測器
ko	Korean 상태 관측기
pl	Polish Obserwator stanu
ru	Russian Наблюдатель (динамические системы)
zh	Chinese 狀態觀測器

Best Rank

English: #210482 12.2014

Global: #205282 12.2014

Best Rank

English: #34625 01.2021

Global: #60318 02.2007

On 1 July 2026 in multilingual Wikipedia, Internet users most often read articles on the following topics: 2026 FIFA World Cup, Kylian Mbappé, Erling Haaland, Democratic Republic of the Congo, FIFA World Cup, Harry Kane, Romelu Lukaku, Senegal, Michael Olise, Sadio Mané.

In English Wikipedia the most popular articles on that day were: 2026 FIFA World Cup, Harry Kane, Julián Quiñones, List of FIFA World Cup top goalscorers, Kylian Mbappé, Democratic Republic of the Congo, Erling Haaland, DR Congo national football team, Melat Kiros, FIFA World Cup.

The WikiRank project is intended for automatic relative evaluation of the articles in the various language versions of Wikipedia. At the moment the service allows to compare over 50 million Wikipedia articles in 55 languages. Quality scores of articles are based on Wikipedia dumps from July, 2026. When calculating current popularity and AI of articles data from June 2026 was taken into account. For historical values of popularity and AI WikiRank used data from 2001 to 2026... More information