SEMI-ACTIVE ENERGY-FEED SUSPENSION SHOCK ABSORBER BASED ON HYBRID EXCITATION AND DIMENSION DETERMINATION METHOD THEREOF

摘要

Provided is a semi-active energy-feed suspension shock absorber based on hybrid excitation. The suspension shock absorber comprises an upper lifting lug (1), a dust cover (2), a lower lifting lug (3), a hydraulic shock absorber, and a hybrid excitation mechanism (20). The hydraulic shock absorber provides a constant viscous damping coefficient, and the hybrid excitation mechanism (20) provides an adjustable electromagnetic damping force and converts vibrational energy into electrical energy for storage. Also provided is a method for determining the size of a suspension shock absorber, comprising determining a type selection of the hydraulic shock absorber according to a rated requirement; deriving an expression of the electromagnetic damping force; determining an initial size of the hybrid exciter mechanism using a particle swarm optimization algorithm; performing finite element analysis; optimizing an air gap length, and determining a final size. The suspension shock absorber integrates the hydraulic shock absorber with a hybrid excitation cylindrical linear motor, so as to realize adjustable damping force and to recover energy during working process, with simple structure, coordination between vehicle suspension vibration isolation and energy feeding, and also has the function of Fail-safe. The method for determining the size of the suspension shock absorber has definite steps, simple implementation, obvious optimization result and strong practicality.