The Design of an Electromagnetic Linear Actuator for an Active Suspension

Through the support of the United States Tank and Automotive Command (TACOM), The University of Texas at Austin Center for Electromechanics (UT-CEM) has developed a prototype electromagnetic (EM) linear actuator suitable for vehicle active suspensions. The prototype actuator built was designed to be used in conjunction with a supplemental air spring. It is capable of producing 8,896 N (2,000 lb) of force with a 12.7 cm (5 in.) stroke and up to 1 m/s (40 in./s) velocity. The actuator was designed as a retrofit for military high mobility multi-wheeled vehicles (HMMWV). The design also focused on capability of being retrofit on a 18.1 kg (20-ton) metropolitan advanced technology transit bus (ATTB).