The RSSR mechanisms with partially constant transmission angle

Şaka, Ziya

doi:10.1016/0094-114x(95)00108-b

Cited by 5 publications

(1 citation statement)

References 7 publications

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“…The analysis and development of these linkages are interesting and challenging problems. Numerous researchers have made significant contributions to the study of rigid-link RSSR mechanisms [1][2][3][4][5][6][7][8][9][10][11][12]. A center-driven linkage system (CDLS) comprises two RSSR linkage systems driven by a single central input link.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Spatial Windshield Wiper Linkages by Using the Differential Evolution Method

Chen,

Chung

2024

Preprint

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This study developed a three-dimensional kinematic and dynamic model of a center-driven linkage system (CDLS). Force analysis was conducted to determine the required driving torque to ensure that the input link of the CDLS rotates at a constant speed with a certain angular velocity, even in the presence of frictional resistance torque. The primary objective was to optimize the maximum angular acceleration of the output links to reduce wiper noise. This optimization can enhance the stability of the linkage system while maintaining its operational functionality. In the adopted methodology, the frames of the fixed links are assumed to remain unchanged, and the input link is considered to operate at a constant angular speed and have a constant length. To meet standard vehicle windshield wiper requirements, 10 constraints were imposed on the optimization problem, which was solved using the differential evolution method. The lengths of both output links were reduced by over 10% after optimization.

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Section: Introductionmentioning

confidence: 99%

Optimization of Spatial Windshield Wiper Linkages by Using the Differential Evolution Method

Chen,

Chung

2024

Preprint

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Dimensional synthesis of the optimal RSSR mechanism for a set of variable design parameters

2016

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This paper deals with the dimensional synthesis of the RSSR mechanism, also known as spatial four-bar linkage (R and S stand for revolute and spherical kinematic pairs respectively). To univocally describe the geometry of the RSSR mechanism a specific set of geometry parameters is necessary. Generally speaking, in a synthesis problem a subset of these parameters, defined as design parameters, is usually considered as assigned whereas the remaining ones, defined as design variables, have to be found by the synthesis procedure. That is, the goal of the synthesis procedure is to find the values of the design variables, while satisfying both functional requirements of the mechanism and constraints on the design parameters. In this paper each design parameter is assigned as variable within a given range rather than being assigned as a single value. In general, varying a design parameter means obtaining a different mechanism which has different functional performances as a consequence. This feature gives raise to a novel synthesis problem, which has not been treated in the literature yet. In particular, the RSSR mechanism synthesis presented in this paper takes the optimization of the force transmission as an objective function, while referring to a given range of values of each design parameter. In addition, prescribed constraints on given extreme angular positions for both the input and the output links, on the upper and lower bounds for the transmission ratio, and on the upper and lower bounds for the design variable values have to be satisfied. The synthesis problem, set as a constrained minimization problem, is solved numerically in two steps by means of a Genetic algorithm followed by a quasi-Newton algorithm. As an example of application, a dimensional synthesis of an RSSR mechanism used in a hand exoskeleton is reported.

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A new type of compliant spatial four-bar (RSSR) mechanism

Tanık¹,

Parlaktaş²

2011

Mechanism and Machine Theory

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The RSSR mechanisms with partially constant transmission angle

Cited by 5 publications

References 7 publications

Optimization of Spatial Windshield Wiper Linkages by Using the Differential Evolution Method

Optimization of Spatial Windshield Wiper Linkages by Using the Differential Evolution Method

Dimensional synthesis of the optimal RSSR mechanism for a set of variable design parameters

A new type of compliant spatial four-bar (RSSR) mechanism

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