Roll center

Finding the roll center of a MacPherson strut

The roll center of a vehicle is the notional point at which the cornering forces in the suspension are reacted to the vehicle body.

There are two definitions of roll center. The most commonly used is the geometric (or kinematic) roll center, whereas the Society of Automotive Engineers uses a force-based definition.[1]

Definition

The lateral location of the roll center is typically at the center-line of the vehicle when the suspension on the left and right sides of the car are mirror images of each other.

The significance of the roll center can only be appreciated when the vehicle's center of mass is also considered. If there is a difference between the position of the center of mass and the roll center a moment arm is created. When the vehicle experiences angular velocity due to cornering, the length of the moment arm, combined with the stiffness of the springs and possibly anti-roll bars (also called 'anti-sway bar'), defines how much the vehicle will roll. This has other effects too, such as dynamic load transfer.

Application

When the vehicle rolls the roll centers migrate. The roll center height has been shown to affect behavior at the initiation of turns such as nimbleness and initial roll control.

Testing methods

Current methods of analyzing individual wheel instant centers have yielded more intuitive results of the effects of non-rolling weight transfer effects. This type of analysis is better known as the lateral-anti method. This is where one takes the individual instant center locations of each corner of the car and then calculates the resultant vertical reaction vector due to lateral force. This value then is taken into account in the calculation of a jacking force and lateral weight transfer. This method works particularly well in circumstances where there are asymmetries in left to right suspension geometry.

The practical equivalent of the above is to push laterally at the tire contact patch and measure the ratio of the change in vertical load to the horizontal force.

See also

References

  1. ^ a b An Introduction to Modern Vehicle Design edited by Julian Happian-Smith P293

Read other articles:

Struktur

Untuk kegunaan lain, lihat Struktur (disambiguasi). Struktur molekul DNA sangat berperan penting bagi fungsinya. Struktur adalah pengaturan dan pengorganisasian unsur-unsur yang saling terkait dalam suatu objek material atau sistem, atau objek atau sistem yang terorganisasi.[1] Struktur material meliputi benda-benda buatan manusia, seperti bangunan dan mesin; dan benda-benda alami, seperti organisme biologis, mineral, dan bahan kimia. Struktur abstrak mencakup struktur data dalam ilmu...

 

Daftar Menteri Koordinator Bidang Politik, Hukum, dan Keamanan Indonesia

Menteri Koordinator Bidang Politik, Hukum, dan Keamanan IndonesiaLambangPetahanaHadi Tjahjantosejak 21 Februari 2024Ditunjuk olehPresiden IndonesiaPejabat perdanaMaraden Panggabean Menteri Koordinator Bidang Politik, Hukum, dan Keamanan disingkat Menkopolhukam adalah seorang menteri yang memimpin Kementerian Koordinator Bidang Politik, Hukum, dan Keamanan dan membawahi menteri-menteri bidang politik, hukum, dan keamanan. Jabatan ini dibentuk pada masa pemerintahan Presiden Soeharto tepat...

 

Uran

För platsen i Indien, se Uran (ort) Uran Nummer92 TeckenU GruppN/A Period7 Blockf Nd↑U↓Uqq Protaktinium ← Uran → Neptunium     [Rn] 5f3 6d1 7s2             92U                                                                                   &...

Legal Entanglement

This article does not cite any sources. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed.Find sources: Legal Entanglement – news · newspapers · books · scholar · JSTOR (October 2010) (Learn how and when to remove this template message) Hong Kong TV series or program Legal EntanglementOfficial poster法網伊人GenreLegal dramaScreenplay byChu King-keiLaw Kam-faiLau Choi-wanYip Sa...

 

إفيرالدو دي جيسوس بيريرا

يفتقر محتوى هذه المقالة إلى الاستشهاد بمصادر. فضلاً، ساهم في تطوير هذه المقالة من خلال إضافة مصادر موثوق بها. أي معلومات غير موثقة يمكن التشكيك بها وإزالتها. (مايو 2023) إفيرالدو دي جيسوس بيريرا   معلومات شخصية الميلاد 19 فبراير 1980 (44 سنة)  سالفادور  الطول 1.87 م (6 قدم ...

 

Rights of nature

Legal theory This article is about the legal theory of rights of nature. For a survey of the legislation based on this school of thought, see Rights of nature law. Part of a series onRights of nature Movements and schools of thought Earth jurisprudenceDeep ecologyWild lawEnvironmental personhood Traditional worldviews UbuntuPachamamaSumak Kawsay Scholars and authors Thomas BerryCormac CullinanAldo LeopoldJohn MuirRoderick NashVandana Shiva Other Animal rightsGaia hypothesisRights of nature la...

Hipparchic cycle

Two astronomical cycles introduced by Hipparchos The Greek astronomer Hipparchus introduced three cycles that have been named after him in later literature. Calendar cycle Hipparchus proposed a correction to the 76-year-long Callippic cycle, which itself was proposed as a correction to the 19-year-long Metonic cycle. He may have published it in the book On the Length of the Year (Περὶ ἐνιαυσίου μεγέθους), which has since been lost. From solstice observations, Hipparchus...

 

Население Татарстана

Численность населения республики по данным Росстата составляет 4 003 016[1] чел. (2024). Татарстан занимает 8-е место по численности населения среди субъектов Российской Федерации[2]. Плотность населения — 59,00 чел./км² (2024). Городское население — 76,72[3] % (20...

 

Farley Moody

American football player and lawyer (1891–1918) Farley MoodyLieut. Farley Moody, Tuscaloosa Ala., fell in the fierce fighting in Argonne ForestBiographical detailsBorn(1891-09-18)September 18, 1891Tuscaloosa, Alabama, U.S.DiedOctober 11, 1918(1918-10-11) (aged 27)Argonne Forest, FrancePlaying career19091912Alabama Position(s)QuarterbackCoaching career (HC unless noted)1915Alabama (acting co-HC) Accomplishments and honorsAwardsAll-Southern (1912) Farley William Moody (September 18, 1891...

2020年夏季奧林匹克運動會波蘭代表團

2020年夏季奥林匹克运动会波兰代表團波兰国旗IOC編碼POLNOC波蘭奧林匹克委員會網站olimpijski.pl（英文）（波兰文）2020年夏季奥林匹克运动会（東京）2021年7月23日至8月8日（受2019冠状病毒病疫情影响推迟，但仍保留原定名称）運動員206參賽項目24个大项旗手开幕式：帕维尔·科热尼奥夫斯基（游泳）和马娅·沃什乔夫斯卡（自行车）[1]闭幕式：卡罗利娜·纳亚（皮划艇）&#...

 

Ramanujan tau function

Values of |τ(n)| for n < 16,000 with a logarithmic scale. The blue line picks only the values of n that are multiples of 121. The Ramanujan tau function, studied by Ramanujan (1916), is the function τ : N → Z {\displaystyle \tau :\mathbb {N} \rightarrow \mathbb {Z} } defined by the following identity: ∑ n ≥ 1 τ ( n ) q n = q ∏ n ≥ 1 ( 1 − q n ) 24 = q ϕ ( q ) 24 = η ( z ) 24 = Δ ( z ) , {\displayst...

 

Commensalism

Beneficial symbiosis between species Remora are specially adapted to attach themselves to larger fish (or other animals, in this case a sea turtle) that provide locomotion and food. Commensalism is a long-term biological interaction (symbiosis) in which members of one species gain benefits while those of the other species neither benefit nor are harmed.[1] This is in contrast with mutualism, in which both organisms benefit from each other; amensalism, where one is harmed while the oth...

Harper's Weekly

American political magazine Not to be confused with Harper's Magazine, Harper's Bazaar, or Harpers Wine & Spirit. Harper's WeeklyThe November 10, 1860 cover of Harper's Weekly, featuring an illustration of President-elect Abraham Lincoln by Winslow Homer and Mathew BradyIllustrators Winslow Homer Livingston Hopkins Thomas Nast Granville Perkins Theodore R. Davis CategoriesNews, politicsFrequencyWeeklyFounderFletcher HarperFounded1857 (1857)First issueJanuary 3, 1857 (1...

 

Southern strategy

20th century Republican electoral strategy for the Southern US For the British strategy in the American Revolutionary War, see Southern theater of the American Revolutionary War. The Southern United States as defined by the Census Bureau In American politics, the Southern strategy was a Republican Party electoral strategy to increase political support among white voters in the South by appealing to racism against African Americans.[1][2][3] As the civil rights movement...

 

Kejuaraan Futsal UEFA

Kejuaraan Futsal UEFAMulai digelar1996WilayahEropa (UEFA)Jumlah tim46 (Kualifikasi)12 (Final)Juara bertahan Italia (2 gelar)Tim tersukses Spanyol (6 gelar) UEFA Futsal Euro 2016 Kejuaraan Futsal UEFA (bahasa Inggris: UEFA Futsal Championship) adalah kompetisi futsal utama tim futsal nasional pria yang diatur oleh UEFA (Uni Asosiasi Sepak Bola Eropa). Statistik Tahun Tuanrumah Final Pertandingantempat ketiga Juara Skor Tempatkedua Tempatketiga Skor Tempatkeempat 1996Detail Spanyol Sp...

2017年堺市長選挙

2017年堺市長選挙 2013年 ← 2017年9月24日 → 2019年   候補者 竹山修身当選 永藤英機 政党 無所属 大阪維新の会 得票数 162,318 139,301 得票率 53.8% 46.2% 選挙前市長 竹山修身 無所属 選出市長 竹山修身 無所属 2017年堺市長選挙（2017ねんさかいしちょうせんきょ）とは、日本の地方自治体である大阪府堺市の市長を選出するために執行される選挙で、2017年9月24日に投開�...

 

Cambridge Common

United States historic placeCambridge Common Historic DistrictU.S. National Register of Historic PlacesU.S. Historic district View of the Cambridge Common, ca. 1808–09, with Harvard College on the left and Christ Church on the right.Cambridge CommonLocation in MassachusettsShow map of Greater Boston areaCambridge CommonLocation in United StatesShow map of MassachusettsCambridge CommonCambridge Common (the United States)Show map of the United StatesLocationRoughly SE of Waterhouse St., bord...

 

Bilozers'ke

Questa voce sull'argomento centri abitati dell'Oblast' di Donec'k è solo un abbozzo. Contribuisci a migliorarla secondo le convenzioni di Wikipedia. Bilozers'kecittà(UK) Білозерське Bilozers'ke – Veduta LocalizzazioneStato Ucraina Oblast' Donec'k DistrettoPokrovs'k HromadaBilozers'ke TerritorioCoordinate48°32′12″N 37°03′31″E48°32′12″N, 37°03′31″E (Bilozers'ke) Abitanti14 634 (2022) Altre informazioniFuso orarioUTC+2 Codice KOATUU12...

烹饪

本條目存在以下問題，請協助改善本條目或在討論頁針對議題發表看法。 此條目没有列出任何参考或来源。 (2020年6月10日)維基百科所有的內容都應該可供查證。请协助補充可靠来源以改善这篇条目。无法查证的內容可能會因為異議提出而被移除。 此條目可参照英語維基百科相應條目来扩充。 (2020年1月7日)若您熟悉来源语言和主题，请协助参考外语维基百科扩充条目。请勿�...

 

Diario de Burgos

Diario de Burgos Tipo Periódico diarioPaís España EspañaSede Burgos,  Castilla y LeónÁmbito de distribución ProvincialFundación 1 de abril de 1891 (133 años)Fundador(a) Juan Albarellos Berroeta Juan García RubioGénero Información generalIdioma EspañolDifusión Diaria, formato TabloideCirculación Provincia de BurgosDirector(a) Álvaro Melcón[1]​Editor(a) PromecalISSN 1576-5261Sitio web www.diariodeburgos.es[editar datos en Wikidata] El Diario de Bu...