Abstract
It is important to reduce the energy dissipated even in a mechatronic system such as a forklift. The present paper discusses an optimal velocity and current functions which minimize the dissipated energy of a ball-screw nut in a linear actuator. In order to estimate the dissipated energy, the power transmission efficiency of the linear actuator is induced to be different between lifting and lowering a load. The influence of the lead upon the minimum energy is examined by simulations and experiments.
