Controller design: one op. amp. solutions

Five servo controller design problems are described and their one operational amplifier solutions with experimental results are presented. The plant is a classical position servo control system consisting of a commanding input knob; a following output shaft driven by a motor, gear system, and a power amplifier; and a controller that drives the power amplifier. The first problem is to design a controller that drives the output shaft to track the input shaft. The second problem is to design a controller that drives the output shaft to mirror the position of the input shaft. The third problem is to design a controller that drives the output shaft to lag behind the input shaft by a fixed angle. The fourth problem is to design a controller that eliminates the oscillations caused by excessive controller gain. The last problem is a speed control problem. One operational amplifier solutions were designed to solve these five problems. Experimental results were obtained. In each of the cases the proposed one operational amplifier solution solved the design problem.