抄録
The numerical simulations for load/unload process is investigated. In this simulation, the generalized lubrication equation based on the linearized Boltzmann equation and the suspension motion equation are solved simultaneously in the time domain. The suspension is modeled as lumped vibration system. To simulate contact condition of the suspension motion during unload process, the suspension model consists of 4 status depend on the contact conditions of tab, dimple and limiter. Each status has different stiffness and mass matrix calculated by FEM analysis. The unload behavior for 2.5 inch type drive is calculated with 3 unload speeds and 3 ramp heights. As unload speed increases, it needs larger unload force to peel the slider from disk surface. The roll balance of the air bearing force during unloading is very important to avoid slider-disk contact.
