Abstract
In this research study, a discrete PI controller-based back-calculation algorithm with anti-windup scheme is proposed for the charging control of Lithium Polymer (LiPo) batteries used in Unmanned Aerial Vehicle (UAV). Due to their energy density, lightweight, customized shape, and the size characteristics; these types of batteries are quite popular particularly in UAV applications. However, the battery operation time is quite limited; therefore, an efficient battery charging control system needs to be designed and be able to decrease the charging time without damaging the battery cells. Due to so-called windup phenomena in conventional PI controllers, the performance battery charging control system may face with less performance. The control system regulates the rate of current drawn from the battery to avoid overheating that in turn potentially can lead to a catastrophic deformation of the battery pack. The optimal control parameters of the system are defined based on the dynamic response of the system. The proposed control system is able to decrease the tracking errors in transient periods. However, the tracking performance in the steady-state is similar in both controllers. The simulation of the charging control system is emulated and evaluated and Matlab/Simulink software.