Automatic control system with provision for scanning and memory

The development work on which this article is based was sponsored by the Bureau of Ships, United States Navy Department. This system adjusts a control element to produce a maximum or minimum value of a resulting parameter. The control element is scanned through its entire range of adjustment and returned to the position resulting in the desired maximum or minimum effect. In a system where maxima or minima are present, the tuning equipment reliably selects the largest. The apparatus required is simple and easily understood, and can be maintained by relatively unskilled personnel.