抄録
This paper describes a system to automatically measure and track the frequency with constant phase lag and its gain, considering the process transfer characteristics in the domain of frequency. This system with two closed loops, each for frequency and gain, consists of analog computing components and simple relay switching devices. An analytical study is made on the static behaviours of this automatic tracking system and the way to reduce static errors is discussed. The response speed of this tracking loop has a certain limit because output fluctuation is increased if speeded up. Therefore, it is considered to design such a system that is fastest in the speed of tracking loop response and yet has a given output variance in a steady state.
