Control systems can be defined as device configuration part interconnections that provide the time needed for the system response. Control systems provide the necessary output with mechanical, optical or electronic devices. For example, the best drilling parameters for the desired ROP are determined for rotational drilling operations. In this case, the regulated performance is the penetration rate for drilling, lower-hole relationship, and drilling parameters. The controller must attempt to design a control system which provides the highest possible ROP for drilling. When human input is limited to a small range, the computer becomes an automatic control mechanism. The objective of this research was to establish an optimized closed loop control system for automated drilling operations, taking into account all factors affecting the penetration rate of drilling. These factors considered in this research include drilling parameters, formation parameters, bit parameter, and drilling fluid parameters. In order to automate the process, closed loop control systems have been developed to optimize these individual parameters, which eventually reduce physical or mental human interference. Thus the optimum penetration rate of drilling was achieved and the overall drilling performance was increased.