Ergonomic optimization of a spring-loaded bicycle crank

1. Abstract This paper describes the optimization of a bicycle crank mechanism equipped with springs. The purpose of the springs is to cause an even torque development over the crank cycle by elimination of the so-called dead centers of the cycle. The technology behind the optimization, musculoskeletal modeling, is described in some detail before the actual case is introduced and subjected to design optimization. It is concluded that this technology holds a large potential as analysis tool in design optimization and opens an entirely new field of practical applications.