Haptic force simulation for cardiac muscle palpation training system

In this paper, we present the mechanical palpation training system for cardiac muscle treatment, and propose the spring-system model based on the feedback control, which is for a regeneration of palpation feeling. Our approach is to directly touch the linear actuator, get optical reactive force with the control of spring stretch and recognize it as a feeling. In order to decide the target position of the spring stretch, we need to know the quantity of finger force, i.e., disturbance. By using disturbance observer, the force can be estimated. This proposed control method is experimentally verified by the simulation results.