Abstract
Focal cooling for termination of epileptic discharges has recently become a focus of research. The authors reported on a newly devised cooling system that uses a Peltier chip and a heat sink. A Peltier chip changes dynamic characteristics under the condition of use, so be known that temperature control is difficult. With the goal of construct the temperature control method of the devise, discussed the mathematical model, unknown parameters of the model and a nonlinear control method. First, the authors developed the mathematical model basis on the equation about Peltier chip-heat sink energy balance. Second, the authors experimented to know basic performance of the devise. Third, the authors identified unknown parameters based on an optimal method using experimental results. Forth, the authors discussed control method about both the PID control and the sliding mode control. As a result, the mathematical model can fully simulate temperature variation of the device as long as consider of parameter variation. Finally, the sliding mode control method was shown to be of benefit in temperature control using a Peltier chip
