In electrical engineering the technical terms “servomotor” and “servo control system” are used since long decades ago. They generally accepted wide-range denominations worldwide in scientific papers, books, advertisements other publications. words, above two become somewhat self-understanding incontestable parts of our language. However, this paper emphasizes idea to discuss exact real meaning ...

In this paper we study image based visual servo (IBVS) control of a four rotor vertical takeoff and landing (VTOL) craft known as an X4-fEyer. The approach taken is tailored to planar visual targets and is based on a reformulation and extension of 2 2 0 image-based visual servo design [14, 11 to the control of dynamic under-actuated systems. Exponential stability of the closed loop system is pr...

This paper presents the LQ-Servo control with observer for TCP/AQM system considering an input time-delay. This controller structure is made by taking a traditional servo mechanism based on Linear Quadratic approach and by augmenting a new state variable to the feed forward loop. In order to estimate the state of TCP window packet size, the control structure is extended with observer based on K...