Dynamic Optimization and Modification for the Parameters of&nbsp; Multi-Speed Planetary Transmission System

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Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (4) : 67-74.

Dynamic Optimization and Modification for the Parameters of Multi-Speed Planetary Transmission System

DOU Zuozheng1, LI Yinong1, DU Minggang2, YANG Yang2, ZHAO Layue2

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Abstract

To prevent torsional resonance of multi-gears of multi-speed planetary transmission system which because of improper choose of the parameters, dynamic optimization and modification for the parameters of the system was conducted by using the multi-step genetic algorithm which adopt relative sensitivity of natural frequencies to parameters of the system to be the constraint conditions, and to minimize the change rate of parameters relative to its initial value was taken as the dynamic objective function and dynamic constraint boundary. Comparative study of taking the change rate of parameters relative to its initial value to be optimal and taking every step to be optimal when different step size was taken into consideration had been done. And the characteristic of natural frequencies to parameters of planetary transmission system apply to multi-gears and single-gear was analyzed. The result indicate that better optimization result can be got in the multi-step genetic algorithm when using the change rate of parameters relative to its initial value to be optimal compare with using every step to be optimal; The natural frequencies to parameters of single-gear of planetary transmission system can not be used for guidance of multi-gears system directly. Resonance will not produce at the range of working speed of the system after optimization and modification of parameters, and a guidance for the design of the planetary transmission can be provided by this paper.

Key words

multi-speed / planetary transmission / relative sensitivity / multi-step genetic algorithm / optimization and modification of parameter

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DOU Zuozheng1, LI Yinong1, DU Minggang2, YANG Yang2, ZHAO Layue2. Dynamic Optimization and Modification for the Parameters of Multi-Speed Planetary Transmission System[J]. Journal of Vibration and Shock, 2018, 37(4): 67-74

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