F l o r i a n P E T R E S C U\’ s B o o k s S t o r eThe Design of Gearings with High EfficiencyISBN 978-1-4467-9054-0A Short Book Description: Development and diversification of machines and mechanisms with applications in all areas of scientific research requires new systematization and improvement of existing mechanical systems by creating new mechanisms adapted to the modern requirements, which involve more complex topological structures. Modern industry, the practice of engineering design and manufacture increasingly rely more on scientific research results and practical. The processes

via The Efficiency of Gearings – THE DESIGN OF GEARINGS WITH HIGH EFFICIENCY.

 


F l o r i a n   P E T R E S C U’ s   B o o k s   S t o r e

The Design of Gearings with High Efficiency

ISBN 978-1-4467-9054-0


A Short Book Description:

Development and diversification of machines and mechanisms with applications in all areas of scientific research requires new systematization and improvement of existing mechanical systems by creating new mechanisms adapted to the modern requirements, which involve more complex topological structures. Modern industry, the practice of engineering design and manufacture increasingly rely more on scientific research results and practical.

The processes of robotisation of today define and influence the emergence of new industries, with applications in specific environmental conditions, handling of objects in outer space, and are leading teleoperator in disciplines such as medicine, automations, nuclear energetic, etc.

In this context this paper attempts to bring a contribution to science and technology applied in the kinematic and dynamic analysis and synthesis of mechanisms with gearings.

The book presents an original method to determine the efficiency of the gear. The originality of this method relies on the eliminated friction modulus. The work is analyzing the influence of a few parameters concerning gear efficiency. These parameters are: z1 – the number of teeth for the primary wheel of gear; z2 – the number of teeth of the secondary wheel of gear; ?0 – the normal pressure angle on the divided circle; ? – the inclination angle. With the relations presented in this paper, one can synthesize the gear’s mechanisms.

We begin with the right teeth (the toothed gear), with i=-4, once for z1 we shall take successively different values, rising from 8 teeth. One can see that for 8 teeth of the driving wheel the standard pressure angle, ?0=200, is too small to be used (it obtains a minimum pressure angle, ?m, negative and this fact is not admitted; see the first table). In the second table we shall diminish (in module) the value for the ratio of transmission, i, from 4 to 2. We will see how for a lower value of the number of teeth of the wheel 1, the standard pressure angle (a0=200) is too small and it will be necessary to increase it to a minimum value. For example, if z1=8, the necessary minimum value is a0=290 for an i=-4 (see the table 1) and a0=280 for an i=-2 (see the table 2). If z1=10, the necessary minimum pressure angle is a0=260 for i=-4 (see the table 1) and a0=250 for i=-2 (see the table 2). When the number of teeth of the wheel 1 increases, we can decrease the normal pressure angle, a0. We will see that for z1=90 it can take a less value for the normal pressure angle (for the pressure angle of reference), a0=80. In the table 3 we increases the module of i value (the ratio of transmission), from 2 to 6.

In the table 4, the teeth are bended (b?0). The module i takes now the value 2.

The efficiency (of the gear) increases when the number of teeth for the driving wheel 1, z1, increases, and when the pressure angle, ?0, diminishes; z2 and i12 have not so much influence about the efficiency value.

We can easily see that for the value ?0=200, the efficiency takes roughly the value ??0.89 for any values of the others parameters (this justifies the choice of this value, ?0=200, for the standard pressure angle of reference).

But the better efficiency may be obtained only for a ?0?200 (?0<200).

The pressure angle of reference, ?0, can be decreased, when in the same time, the number of teeth for the driving wheel 1, z1, increases, to increase the gears’ efficiency.

Contrary, when we desire to create a gear with a low z1 (for a less gauge), it will be necessary to increase the ?0 value, for maintaining a positive value for ?m (in this case the gear efficiency will be diminished).

When ? increases, the efficiency (?) increases too, but its growth is insignificant. We can see in the last part of the work, that in reality it (? increases) produces a decrease in yield.

The module of the gear, m, has not any influence on the gear’s efficiency value.

When ?0 is diminished one can take a higher normal module, for increasing the addendum of teeth, but the increase of the m at the same time with the increase of the z1 can lead to a greater gauge.

The gears’ efficiency (?) is really a function of ?0 and z1: ?=f(?0,z1); the two angles (?m and ?M) are just the intermediate parameters (intermediate variables).

For a good projection of the gear, it’s necessary a z1 and a z2 greater than 30-60; but this condition may increase the gauge of mechanism; when the numbers of teeth z1 and z2 beyond the 30 value, the efficiency of the gearing are greater, and the values of the two different efficiencies leveled; this can be a great advantage in transmissions, especially in planetary transmissions, where the moments may come from both directions; will result a better and more equilibrated functionality (But these are the subject of a future work).

In the second (and last) part the book presents shortly an original method to obtain the efficiency of the geared transmissions in function of the contact ratio. With the presented relations one can make the dynamic synthesis of the geared transmissions having in view increasing the efficiency of gearing mechanisms in work (the accuracy of calculations will be high).

One calculates the efficiency of a geared transmission, having in view the fact that at one moment there are several couples of teeth in contact, and not just one.

The start model has got four pairs of teeth in contact (4 couples) concomitantly.

The first couple of teeth in contact has the contact point i, defined by the ray ri1, and the pressure angle ai1; the forces which act at this point are: the motor force Fmi, perpendicular to the position vector ri1 at i and the force transmitted from the wheel 1 to the wheel 2 through the point i, Fti, parallel to the path of action and with the sense from the wheel 1 to the wheel 2, the transmitted force being practically the projection of the motor force on the path of action; the defined velocities are similar to the forces (having in view the original kinematics, or the precise kinematics adopted); the same parameters will be defined for the next three points of contact, j, k, l (see fig. 2).

The best efficiency can be obtained with the internal gearing when the drive wheel 1 is the ring; the minimum efficiency will be obtained when the drive wheel 1 of the internal gearing has external teeth. For the external gearing, the best efficiency is obtained when the bigger wheel is the drive wheel; when one decreases the normal angle a0, the contact ratio increases and the efficiency increases as well. The efficiency increases too, when the number of teeth of the drive wheel 1 increases (when z1 increases).

Generally we use gearings with teeth inclined (with bended teeth). For gears with bended teeth, the calculations show a decrease in yield when the inclination angle increases. For angles with inclination which not exceed 25 degree the efficiency of gearing is good (see the table 6). When the inclination angle (?) exceeds 25 degrees the gearing will suffer a significant drop in yield (see the tables 7 and 8).

The calculation relationships (33-35) are general (Have a general nature). They have the advantage that can be used with great precision in determining the efficiency of any type of gearings.

1 Introduction

In this paper the authors present an original method to calculating the efficiency of the gear.

The originality consists in the way of determination of the gear’s efficiency because one hasn’t used the friction forces of couple (this new way eliminates the classical method). One eliminates the necessity of determining the friction coefficients by different experimental methods as well. The efficiency determined by the new method is the same like the classical efficiency, namely the mechanical efficiency of the gear.

Some mechanisms work by pulses and are transmitting the movement from an element to another by pulses and not by friction. Gears work practically only by pulses. The component of slip or friction is practically the loss. Because of this the mechanical efficacy becomes practically the mechanical efficiency of gear.

The paper is analyzing the influence of a few parameters concerning gear efficiency. With the relations presented in this paper, one can synthesize the gear’s mechanisms. Today, the gears are present every where in the mechanical’s world.


 

Author: Florian Ion TIBERIU-PETRESCU Company: UPB POLYTECHNIC UNIVERSITY OF BUCHAREST TMR Department Residence: BUCHAREST – ROMANIA – EUROPE Websites:

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Memorable Quote 1: Drivetrain Expert (Gear And Gearing Expert) Memorable Quote 2: Otto Engines Expert (Powertrain Expert)

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THE DESIGN OF GEARINGS WITH HIGH EFFICIENCY

 

ISBN 978-1-4467-9054-0

THE DESIGN OF GEARINGS WITH HIGH EFFICIENCY

 

ISBN 978-1-4467-9054-0 Development and diversification of machines and mechanisms with applications in all areas of scientific research requires new systematization and improvement of existing mechanical systems by creating new mechanisms adapted to the modern requirements; the gearing mechanisms are found today everywhere: in the industry of machinery construction, in energy industry, in aeronautics and aerospace, in electronics& Electrical, in oil industry, in mechatronics and robotics, etc. In this context this book attempts to bring a contribution to science and technology applied in the kinematic and dynamic analysis and synthesis of mechanisms with gearings. The book presents an original method to determine the efficiency of the gearing; the originality of this method relies on the eliminated friction modulus. With the relations presented in this paper, one can synthesize the gear’s mechanisms; the best efficiency can be obtained with the internal gearing when the drive wheel 1 is the ring. Paperback, 32 pages $15.24 | or File Download, PDF Format $9.21


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Development and diversification of machines and mechanisms with applications in all areas of scientific research requires new systematization and improvement of existing mechanical systems by creating new mechanisms adapted to the modern requirements; the gearing mechanisms are found today everywhere: in the industry of machinery construction, in energy industry, in aeronautics and aerospace, in electronics& Electrical, in oil industry, in mechatronics and robotics, etc. In this context this book attempts to bring a contribution to science and technology applied in the kinematic and dynamic analysis and synthesis of mechanisms with gearings. The book presents an original method to determine the efficiency of the gearing; the originality of this method relies on the eliminated friction modulus. With the relations presented in this paper, one can synthesize the gear’s mechanisms; the best efficiency can be obtained with the internal gearing when the drive wheel 1 is the ring.

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THE DESIGN OF GEARINGS WITH HIGH EFFICIENCY

Development and diversification of machines and mechanisms with applications in all areas of scientific research requires new systematization and improvement of existing mechanical systems by creating new mechanisms adapted to the modern requirements; the gearing mechanisms are found today everywhere: in the industry of machinery construction, in energy industry, in aeronautics and aerospace, in electronics& Electrical, in oil industry, in mechatronics and robotics, etc. In this context this book attempts to bring a contribution to science and technology applied in the kinematic and dynamic analysis and synthesis of mechanisms with gearings. The book presents an original method to determine the efficiency of the gearing; the originality of this method relies on the eliminated friction modulus. With the relations presented in this paper, one can synthesize the gear’s mechanisms; the best efficiency can be obtained with the internal gearing when the drive wheel 1 is the ring.

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MASTER TMR

January 16, 2011

MASTER TMR.

Inscriere Master TMR

Relaţii suplimentare la secretariatul catedrei TMR (ARoTMM IFToMM) Splaiul Independentei 313, Cladirea Transporturi (Sala JC 102) Telefon: 021-4029632, e-mail: catedramecanismesiroboti@yahoo.com

ADMITERE

MASTER

Facultatea Ingineria si Managementul Sistemelor Tehnologice

Catedra de Teoria Mecanismelor şi a Roboţilor

Specializarea 1: MODELAREA SI SIMULAREA SISTEMELOR MECANICE MOBILE

Durata studiilor: 1,5 ani/3 sem.,

Număr total de locuri: subvenţionate de la buget 20

Competenţe

Asimilarea noţiunilor fundamentale privind analiza, sinteza şi proiectarea sistemelor biomorfe şi biomecanice pentru aplicaţii tehnice şi medicale;

Dezvoltarea abilităţilor de calcul şi de modelare cinematică şi dinamică a unor sisteme biomorfe şi biomecanice cu aplicaţii tehnice şi medicale;

Dezvoltarea abilităţilor de analiză experimentală a diverselor clase de mecanisme;

Insuşirea unor tehnici avansate de prelucrare a datelor experimentale specifice modelării şi simulării sistemelor biomorfe şi biomecanice.

Specializarea 2: CONSULTANTA IN PROIECTAREA SISTEMELOR MECANICE

Durata studiilor: 1,5 ani/3 sem.,

Număr total de locuri: subvenţionate de la buget 20

Competenţe

Analiza şi evaluarea sistemelor mecanice; utilizarea tehnicilor avansate de modelare în proiectarea acestora;

Modelarea structurală, cinematică şi dinamică a sistemelor mecanice acţionate electric, hidraulic, pneumatic etc.;

Prelucrarea datelor experimentale;

Metode de abordare sistemică a cercetării şi proiectării sistemelor mecanice;

Promovarea iniţiativei private prin intermediul unor cabinete individuale de consultanţă şi asistenţă pentru proiectarea, cercetarea şi inovarea sistemelor mecanice.

UNIVERSITĂŢI PARTENERE:

· Technische Universitat Braunschweig-Germania

· Galway-Mayo Institute of Technology-Ireland

· Instituto Politecnico do Porto- Portugal

· Linkoping Universitet – Sweden

· University of Cassino – Italy

· University of Bilbao – Spain

Concursul de admitere în învăţământul postuniversitar de masterat şi studii academice se organizează într-o singură sesiune,

în perioada 14-18 septembrie


Perioada de înscriere este 01-11 septembrie, între orele 9:00 – 15:00,

la Catedra Teoria mecanismelor şi a roboţilor, Sala JC 102

Cuantumul taxei de înscriere este de 100 RON şi a fost stabilit de către Senatul UPB.

Copiii personalului didactic sunt scutiţi de plata taxelor de înscriere la concursurile de admitere în învăţământul superior, o singura dată în cadrul unei instituţii de învăţământ superior.

Facilitati:

Taxa de înscriere la concurs este de 100 lei (RON)

Taxa de înmatriculare pentru candidaţii admişi este de 50 lei

Repartitia candidatilor pe cele doua specializari se face dupa prima opţiune a specializarii şi in ordinea descrescatoare a mediilor.

Candidatii admisi la master cu plată si care sunt deja angajati, pot beneficia, la cerere, de un regim preferential al comasarii unor activitati didactice.

Candidatii care frecventeaza cu regularitate cursurile de Master pot beneficia de locuri in camin

Candidatii admisi la master pot beneficia de burse de studiu pe durate de 3, 4, 6, 12 luni la universitatile partenere din Europa.

Actele necesare pentru înscriere:

0)Pentru înscriere, un dosar plic, care trebuie sa contina urmatoarele documente:

1) – fisa de înscriere tip obtinuta de la Comisia de admitere a facultatii, în care se va mentiona sub semnatura si raspundere proprie toate datele solicitate. În fisa de înscriere nu se admit modificari, adaugiri sau stersaturi;

2) – doua fotografii, tip buletin de identitate;

3) – diploma de bacalaureat, în original;

4) – diploma de licenta/inginer sau echivalenta acesteia, în original (candidatii din promotia 2009 pot fi înscrisi si pe baza adeverintei de absolvire, cu precizarea mediei generale a anilor de studii si a mediei de la examenul de diploma/licenta);

5) – foaia matricola/suplimentul la diploma în copie, confirmata de secretariatul facultatii absolvite;

6) – certificatul de nastere în copie legalizata;

7) – adeverinta medicala tip, eliberata de un cabinet medical, din care sa rezulte ca solicitantul este apt medical pentru specializarea la care candideaza;

8) – certificatul de casatorie în copie legalizata (daca este cazul);

9) – buletin/carte de identitate în copie;

10) – chitanta de plata a taxei de admitere, obtinuta de la secretariatul facultatii.

*) Pentru respectarea prevederilor în vigoare privind regimul actelor de studii în România, toti candidatii vor fi înscrisi la concursul de admitere cu numele din certificatul de nastere, inclusiv în cazurile în care din anumite motive ei si-au schimbat acest nume.

1. Relaţii suplimentare la secretariatul catedrei TMR (Sala JC 102) Telefon: 021-4029632, e-mail: catedramecanismesiroboti@yahoo.com

Gear Expert

January 15, 2011

Gear Expert.

 

 

© 2010 Florian Ion PETRESCU and Relly Victoria PETRESCU – Gears Design

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Thesis: Contribuţii teoretice şi aplicative privind dinamica mecanismelor plane cu cuple superioare – Florian Ion Tiberiu-Petrescu.

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Contribuţii teoretice şi aplicative privind dinamica mecanismelor plane cu cuple superioare
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Florian Ion Tiberiu-Petrescu, Universitatea “Politehnica”, Bucureşti, 2008
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Tema tezei de doctorat este deosebit de importantă, utilă şi interesantă pentru că abordează o problematică complexă de mare actualitate privind dinamica mecanismelor plane cu came, tacheţi şi angrenaje cu roţi dinţate cu axe paralele. Cercetările s-au efectuat pe baza unei vaste bibliografii, care cuprinde cele mai reprezentative lucrări în acest domeniu.
Conţinutul tezei se ridică la cele mai mari exigenţe impuse unei lucrări de doctorat şi are un înalt nivel ştiinţific. Rezultatele obţinute au fost interpretate corect şi au fost valorificate prin publicarea mai multor lucrări ştiinţifice în străinătate şi în ţară, lucrări ce se bucură de aprecierea specialiştilor din construcţia de maşini.
Teza conţine foarte multe elemente de originalitate ca: rezolvarea ecuaţiei diferenţiale a mişcării, modelul dinamic de integrare, analiza dinamică a mecanismului clasic de distribuţie, dinamica mecanismelor de distribuţie cu tachet translant, respectiv balansier, cu rolă sau plat, calculul randamentului mecanic al cuplei tachet-camă printr-o metodă absolut originală, determinarea randamentului angrenajelor cu roţi dinţate cu axe paralele, randamentul instantaneu, randamentul mediu, calculul angrenajelor interioare, determinarea randamentului angrenajelor ţinând seama de gradul de acoperire, sinteza angrenajelor cu roţi dinţate cu axe paralele pe baza randamentului în funcţionare, etc.
Concluziile la care a ajuns autorul sunt foarte importante atât din punct de vedere teoretic cât şi practic; astfel a stabilit că: tachetul cu rolă permite o mărire a turaţiei motorului până la o valoare dublă faţă de modelul clasic (cu tachet plat), angrenajele cu roţi dinţate pot lucra la turaţii şi momente de torsiune ridicate cu randamente mecanice foarte mari, randamentul cel mai mare se întâlneşte la angrenajele interioare cu roata (inel) având dantură interioară conducătoare, iar la angrenajele cu dantură exterioară randamentul este mai mare când roata mare este conducătoare; cu cât unghiul normal de angrenare scade, creşte gradul de acoperire şi odată cu el şi randamentul angrenării; randamentul mai creşte şi odată cu numărul de dinţi ai roţii conducătoare, etc.
Prin problematica abordată, teza de doctorat a dl. ing. Florian Ion PETRESCU, sub conducerea ştiinţifică a prof. dr. ing. Păun ANTONESCU, se înscrie în contextul sistematizării şi perfecţionării sistemelor mecanice existente, prin crearea de noi mecanisme adaptate cerinţelor moderne, ceea ce implică structuri topologice tot mai complexe.
Scopul lucrării este de a construi modele noi teoretice şi aplicative în analiza şi sinteza dinamică a mecanismelor cu came şi roţi dinţate plane. Teza de doctorat este structurată în trei părţi: prima parte prezintă dinamica mecanismelor plane cu came, tacheţi şi supape, partea a doua prezintă dinamica mecanismelor plane formate din angrenaje cu roţi dinţate cu axe paralele, iar partea a treia conţine concluzii şi enumerarea contribuţiilor originale, cât şi anexe. Bibliografia este ataşată fiecărei părţi. 

Din prezentarea făcută se constată o multitudine de rezultate originale valoroase obţinute de dl. ing. Florian Ion PETRESCU.

Menţionăm câteva din aceste contribuţii:
Partea I-a:
1. Un model dinamic monomasic (cu un singur grad de libertate), translant, cu amortizare internă variabilă. Se determină amortizarea internă a sistemului şi ecuaţiile de mişcare.
2. Cinematica de precizie a mecanismelor de distribuţie, exemplificată pe mecanismul clasic cu camă rotativă şi tachet plat translant, bazată pe un model original de cinematică dinamică. Se determină exact randamentul mecanic, care nu are nici o legătură cu pierderile suplimentare prin frecare (se elimină astfel necesitatea determinării coeficientului de frecare).
3. Un model nou de distribuţie a forţelor şi vitezelor la tachetul translant cu rolă. Se demonstrează performanţele în raport cu modelele clasice.
4. O metodă nouă de determinare a forţelor şi vitezelor la mecanismul cu camă rotativă şi tachet balansier cu rolă. Determinarea randamentului mecanismului.
5. Metode aproximative şi de integrare directă a ecuaţiilor de mişcare.

Partea a II-a:
6. Model nou în dinamica mecanismelor plane formate din angrenaje cu roţi dinţate cu axe paralele.
7. Determinarea randamentului unui angrenaj cu roţi dinţate cu axe paralele pentru dinţii drepţi, în funcţie şi de gradul de acoperire al angrenajului.

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Abstract

 

Relly & Florian PETRESCU : CONTRIBUTIONS TO THE ANALYSIS AND SYNTHESIS OF MECHANISMS WITH BARS AND GEARING | UniBook.

 

CONTRIBUTIONS TO THE ANALYSIS AND SYNTHESIS OF MECHANISMS WITH BARS AND GEARING

Relly & Florian PETRESCU

Short description

Development and diversification of machines and mechanisms with applications in all areas of scientific research requires new systematization and improvement of existing mechanical systems by creating new mechanisms adapted to the modern requirements, which involve more complex topological structures. Modern industry, the practice of engineering design and manufacture increasingly rely more on scientific research results and practical. The processes of robotization of today define and influence the emergence of new industries, with applications in specific environmental conditions, handling of objects in outer space, and are leading teleoperator in disciplines such as medicine, automations, nuclear energetic, etc. In this context this paper attempts to bring a contribution to science and technology applied in the kinematic analysis and synthesis geometro – kinematic of mechanisms with bars and gearing.

Author Bio

PhD. Eng. Relly Victoria PETRESCU, Senior Lecturer at UPB (Bucharest Polytechnic University), GDGI (Descriptive Geometry and Engineering Graphics) Department, Bucharest, ROMANIA, Europe; PhD. Eng. Florian Ion PETRESCU, Senior Lecturer at UPB (Bucharest Polytechnic University), TMR (Theory of Mechanisms and Robots) Department, Bucharest, ROMANIA, Europe.

http://www.unibook.com/Relly-%2526-Florian-PETRESCU/CONTRIBUTIONS-TO-THE-ANALYSIS-AND-SYNTHESIS-OF-MECHANISMS-WITH-BARS-AND-GEARING

http://www.unibook.com/Relly-%2526-Florian-PETRESCU/CONTRIBUTIONS-TO-THE-ANALYSIS-AND-SYNTHESIS-OF-MECHANISMS-WITH-BARS-AND-GEARING

 

http://www.unibook.com/Relly-%2526-Florian-PETRESCU/CONTRIBUTIONS-TO-THE-ANALYSIS-AND-SYNTHESIS-OF-MECHANISMS-WITH-BARS-AND-GEARING

http://www.unibook.com/Relly-%2526-Florian-PETRESCU/CONTRIBUTIONS-TO-THE-ANALYSIS-AND-SYNTHESIS-OF-MECHANISMS-WITH-BARS-AND-GEARING

 

 

 

Relly & Florian PETRESCU : CONTRIBUTIONS TO THE ANALYSIS AND SYNTHESIS OF MECHANISMS WITH BARS AND GEARING | UniBook.

 

CONTRIBUTIONS TO THE ANALYSIS AND SYNTHESIS OF MECHANISMS WITH BARS AND GEARING

Relly & Florian PETRESCU

Short description

Development and diversification of machines and mechanisms with applications in all areas of scientific research requires new systematization and improvement of existing mechanical systems by creating new mechanisms adapted to the modern requirements, which involve more complex topological structures. Modern industry, the practice of engineering design and manufacture increasingly rely more on scientific research results and practical. The processes of robotization of today define and influence the emergence of new industries, with applications in specific environmental conditions, handling of objects in outer space, and are leading teleoperator in disciplines such as medicine, automations, nuclear energetic, etc. In this context this paper attempts to bring a contribution to science and technology applied in the kinematic analysis and synthesis geometro – kinematic of mechanisms with bars and gearing.

Author Bio

PhD. Eng. Relly Victoria PETRESCU, Senior Lecturer at UPB (Bucharest Polytechnic University), GDGI (Descriptive Geometry and Engineering Graphics) Department, Bucharest, ROMANIA, Europe; PhD. Eng. Florian Ion PETRESCU, Senior Lecturer at UPB (Bucharest Polytechnic University), TMR (Theory of Mechanisms and Robots) Department, Bucharest, ROMANIA, Europe.

http://www.unibook.com/Relly-%2526-Florian-PETRESCU/CONTRIBUTIONS-TO-THE-ANALYSIS-AND-SYNTHESIS-OF-MECHANISMS-WITH-BARS-AND-GEARING

http://www.unibook.com/Relly-%2526-Florian-PETRESCU/CONTRIBUTIONS-TO-THE-ANALYSIS-AND-SYNTHESIS-OF-MECHANISMS-WITH-BARS-AND-GEARING

 

http://www.unibook.com/Relly-%2526-Florian-PETRESCU/CONTRIBUTIONS-TO-THE-ANALYSIS-AND-SYNTHESIS-OF-MECHANISMS-WITH-BARS-AND-GEARING

http://www.unibook.com/Relly-%2526-Florian-PETRESCU/CONTRIBUTIONS-TO-THE-ANALYSIS-AND-SYNTHESIS-OF-MECHANISMS-WITH-BARS-AND-GEARING

 

 

This paper is a scientific view, uniform, general, comprehensive and unbiased of the main problems posed by mechanical systems, mobile, serial and parallel. It gives an overview, followed by geometric and kinematic study of the serial and parallel structures. It continues with an introduction in the dynamics these systems. At the serial systems are studied both direct and indirect kinematics, while at the parallel systems is studied only indirect kinematics (this being more useful). Presentation is closely linked of the basic methods of calculating the matrix, which are introduced step by step for a easy understanding of the each sequence.The book is divided into 14 chapters, who have been based on our courses, prepared for our students of the next

via Florian & Relly Petrescu : Mechanical Systems, Serial and Parallel, in movement | UniBook.