Cam Geometry Generation and Optimization for Torsion Bar Systems

Date

2015-02-05

Author

Kurtulmus, Ergin
Arıkan, Mehmet Ali Sahir

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

143
views

0
downloads

Moment unbalance is a critical issue in many mechanisms rotating around a certain axis. The common element for eliminating the moment unbalance is a spring attached to the rotary system which can nullify it only at a certain angle or position due to the cosine profile of the unbalance. In order to accomplish this at all angles, torsion bar systems following a cam profile are preferred instead. In this paper, a new method has been developed to generate the exact analytical cam profile on which torsion bar system will roll. Using the moment balance equations and the equations related to the geometry of the cam profile at rotated frames and torsion bar parameters, seven nonlinear differential equations with corresponding initial conditions are obtained. Solution of this set of nonlinear equations determined the cam profile, torsion bar torque profile and the overall system layout. Then, the problem transformed into an optimization problem with an objective of minimizing the maximum amount of torque induced on the torsion bar with certain geometrical and structural constraints, with initial conditions forming the search space. Systematical solution to this optimization problem created a blueprint for the design of a generic system in a constrained volume.

Subject Keywords

Moment Unbalance, Nonlinear Systems, Optimization, Cam Geometry, Torsion Bar

URI

https://hdl.handle.net/11511/40192

DOI

https://doi.org/10.1007/978-3-319-15221-9_40

Collections

Department of Mechanical Engineering, Conference / Seminar

Suggestions

OpenMETU
Core

STABILITY OF CONTROL FORCES IN REDUNDANT MULTIBODY SYSTEMS IDER, SK (1996-01-03) In this paper inverse dynamics of redundant multibody systems using a minimum number of control forces is formulated. It is shown that the control forces and the task accelerations may become noncausal at certain configurations, yielding the dynamical equation set of the system to be singular. For a given set of tasks, each different set of actuators leads to a different system motion and also to different singular configurations. To avoid the singularities in the numerical solution, the dynamical equations...
Forced Oscillation of Second-Order Impulsive Differential Equations with Mixed Nonlinearities ÖZBEKLER, ABDULLAH; Zafer, Ağacık (2011-07-08) In this paper we give new oscillation criteria for a class of second-order mixed nonlinear impulsive differential equations having fixed moments of impulse actions. The method is based on the existence of a nonprincipal solution of a related second-order linear homogeneous equation.
Semi analytical study of stress and deformation analysis of anisotropic shells of revolution including first order transverse shear deformation Oygür, Özgür Sinan; Kayran, Altan; Department of Aerospace Engineering (2008) In this study, anisotropic shells of revolution subject to symmetric and unsymmetrical static loads are analysed. In derivation of governing equations to be used in the solution, first order transverse shear effects are included in the formulation. The governing equations can be listed as kinematic equations, constitutive equations, and equations of motion. The equations of motion are derived from Hamilton’s principle, the constitutive equations are developed under the assumptions of the classical laminatio...
Nonlinear system identification and nonlinear experimental modal analysis by using response controlled stepped sine testing Karaağaçlı, Taylan; Özgüven, Hasan Nevzat; Department of Mechanical Engineering (2020-12-24) In this work, two novel nonlinear system identification methods are proposed in both the modal and spatial domains, respectively, based on response-controlled stepped-sine testing (RCT) where the displacement amplitude of the excitation point is kept constant throughout the frequency sweep. The proposed nonlinear modal identification method, which is also a nonlinear experimental modal analysis technique, applies to systems with several nonlinearities at different (and even unknown) locations (e.g. joint no...
Vibration fatigue analysis and testing of notched beams Demirel, Gürzap İsmail; Kayran, Altan; Department of Aerospace Engineering (2019) Mechanical fatigue is an important phenomenon when the structures are exposed to dynamic, fluctuating loadings. Especially aerospace structures are commonly exposed to random vibration loadings. Even if the components are stable and durable for static requirements, vibration fatigue failures can occur due to the dynamic and fluctuating loadings. Moreover, if the loading frequency has a wide bandwidth as in random vibration loadings, the natural frequencies or resonance regions of the structures are disturbe...

Citation Formats

E. Kurtulmus and M. A. S. Arıkan, “Cam Geometry Generation and Optimization for Torsion Bar Systems,” 2015, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/40192.