Computerised symbolic planetary transmission modelling for automotive design

Christos Spitas, Andas Amrin, Amin Amani, Georgios Vasileiou, Vasileios Spitas

Research output: Journal PublicationArticlepeer-review


A method and its computerised implementation are proposed for the modelling of planetary transmission systems. Using a computer symbolic scripting environment, a number of idea class objects and appropriate methods to manipulate them are defined, implementing all the relationships that govern the system kinematics, mechanical efficiency and geometric compatibility. The outcome is a system of equations involving the most pertinent design and performance parameters, which allow a systematic interrogation of the relationships between system design and performance. This method is particularly useful for the synthesis and design of novel automotive planetary transmissions, where very early in the design process an analytical solution to several inverse problems is required, making the proposed computerised symbolic modelling indispensable.

Original languageEnglish
Pages (from-to)58-73
Number of pages16
JournalInternational Journal of Powertrains
Issue number1
Publication statusPublished - 2019
Externally publishedYes


  • Dynamics
  • Efficiency
  • Planetary transmission
  • Symbolic modelling

ASJC Scopus subject areas

  • Automotive Engineering
  • Energy Engineering and Power Technology
  • Mechanical Engineering


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