Mechanical Engineering / Makina Mühendisliği
Permanent URI for this collectionhttps://hdl.handle.net/11147/4129
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Article Citation - WoS: 45Citation - Scopus: 57Analytical Synthesis of Function Generating Spherical Four-Bar Mechanism for the Five Precision Points(Elsevier Ltd., 2005) Alizade, Rasim I.; Alizade, Rasim; Kilit, ÖzgürThis paper presents an analytical method for synthesis of function generating spherical 4R mechanisms for the five precision points. For the design requirements an additional parameter, reference value of output angle, ψ0, was added to angular link length parameters, α i(i = 1, ..., 4). In the dimensional synthesis procedure, a novel approach of polynomial approximation method was proposed to determine these five design parameters. Using this method, a set of five non-linear equations was easily transformed into a set of fifteen linear equations. Hence, the problem was reduced to the solution of a cubic polynomial equation. Moreover, a graphical method in a CAD environment is proposed to verify the solutions. © 2005 Elsevier Ltd. All rights reserved.Conference Object Düzlemsel İki Serbestlik Dereceli Mekanizmaların En Küçük Kareler Toplamı Yöntemi ile İşlev Sentezi(Makina Teorisi Derneği, 2015) Kiper, Gökhan; Bağdadioğlu, Barış; Alizade, Rasim I.Bu çalışmada düzlemsel iki serbestlik dereceli beş ve yedi uzuvlu düzlemsel mekanizmalar ile en küçük kareler toplamı yöntemi kullanılarak işlev sentezi uygulanmaktadır. Beş uzuvlu mekanizmalar tek devreli iken yedi mafsallı mekanizmalar iki devre birleştirilerek oluşmaktadır. R döner mafsal, P ise kayar mafsal olmak üzere RPRRR, RRRRR, 2RPR-RRR, RPR-RRR-RRR, 2RRR-RRR, PRRRR, PPRRR, PRR-RRR-RRR, PRR-PRR-RRR mekanizmaları için sentez formülasyonu türetilmiş ve bilgisayar ortamında sayısal model oluşturulmuştur. Sayısal çalışmalardan bir tanesi çalışmada örnek olarak sunulmuştur.Article Citation - WoS: 11Citation - Scopus: 12Function Synthesis of Bennett 6r Mechanisms Using Chebyshev Approximation(Elsevier, 2014) Alizade, Rasim I.; Kiper, Gökhan; Bağdadioğlu, Barış; Dede, Mehmet İsmet CanThis study focuses on approximate function synthesis of the three types of overconstrained Bennett 6R mechanisms using Chebyshev approximation. The three mechanisms are the double-planar, double-spherical and the plano-spherical 6R linkages. The single-loop 6R mechanisms are dissected into two imaginary loops and function synthesis is performed for both loops. First, the link lengths are employed as construction parameters of the mechanism. Then extra construction parameters for the input or output joint variables are introduced in order to increase the design points and hence enhance the accuracy of approximation. The synthesis formulations are applied computationally as case studies. The case studies illustrate how a designer can compare the three types of Bennett 6R mechanisms for the same function. Also we present a comparison of the spherical four-bar with the double-spherical 6R mechanism and show that the accuracy is improved when the 6R linkage is used.