Optimisation of the Joint Geometry of a Rocker Pin Chain

• Autorzy: Neumann L. , Ulbrich H. , Pfeiffer F.
• Konferencja: Polish-German Workshop on Dynamical Problems in Mechanical Systems (9 ; 4-10.09.2005 ; Paszkówka, Poland)
• Języki publikacji: EN

Abstrakty

EN

Continuous variable chain drives have to satisfy high requirements to compete with common gears and therefore an improvement of certain properties of the CVT (Continuously Variable Transmission) is desired. In this contribution the important goal to reduce the noise emission of the gear is realised by optimising the geometry of the rocker pin chain. Applying numerical simulation techniques and an optimisation algorithm carries out this optimisation. For this purpose a detailed dynamical model of the CVT is introduced which includes an exact treatment of the rocker pin kinematics of the chain. The geometry of the rocker pin joints, which shall be optimised, is defined by the optimisation parameters. A good choice for a measure of the noise emission is the amplitudes of the forces in the bearings in a certain frequency domain. They are used to form the target function. A numerical simulation provides a connection between the optimisation parameters and the objective function, which is not given analytically and takes high simulation effort. Therefore the optimisation algorithm implicit filtering is applied to solve the optimisation problem. The presented approach is applied to minimise the gear vibrations of a CVT by finding optimal geometry parameters. A significant reduction of the noise emission is gained.

• Wydawca: Oficyna Wydawnicza Politechniki Warszawskiej
• Czasopismo: Machine Dynamics Problems
• Rocznik: 2005
• Tom: Vol. 29, No. 4
• Strony: 97--108
• Opis fizyczny: Bibliogr. 7 poz., il.

Twórcy

autor

Neumann L.

• Technical University of Munich, Institute of Applied Mechanics

autor

Ulbrich H.

• Technical University of Munich, Institute of Applied Mechanics

autor

Pfeiffer F.

• Technical University of Munich, Institute of Applied Mechanics

Bibliografia

• 1. Choi, T.D., Eslinger, O.J., Gilmore, P.A., Kelley, C.T., Patrick, H.A., 2001, User's Guide to IFFCO, Center for Research in Scientific Computation, North Carolina State University.
• 2. Kelley, C.T., 1999, Iterative Methods for Optimization. SIAM (Frontiers in Applied Mathematics).
• 3. Neumann, L., Ulbrich, H., Pfeiffer, F., 2005, New Model of a CVT Rocker Pin Chain with Exact Joint Kinematics, to appear in: ASME Journal of Computational and Nonlinear Dynamics.
• 4. Neumann, L., Ulbrich, H., 2005, Optimisation of a CVT-Chain, to appear in the Proceedings of the 6th World Congress on Structural and Multidisciplinary Optimization. Rio de Janeiro, Brazil.
• 5. Sedlmayr, M., 2003, Räumliche Dynamik von CVT-Keilkettengetrieben, Düsseldorf: VDI (Fortschrittberichte VDI, Reihe 12, Nr. 558).
• 6. Sedlmayr, M., Pfeiffer, F., 2001, Spatial Contact Mechanics of CVT Chain Drives., 18th ASME Men. Conf, on Mech. Vibration and Noise DETC01/VIB.
• 7. Srnik, J., 1999, Dynamik von CVT-Keilkettengetrieben, Düsseldorf: VDI (Fortschrittberichte VDI, Reihe 12, Nr. 372).