| 摘要 |
PURPOSE:To eliminate the need for a stabilizing circuit and obtain an inexpensive, high-reliability servo device by multiplying a position command signal by the voltage of an AC exciting power source and comparing the product with an electric signal corresponding to a controlled system, and providing a driving mechanism for the controlled system. CONSTITUTION:A signal of a command position thetaS from a command position source 1 is converted by a position signal converting circuit 2 into a position command signal VS, which is multiplied by the voltage signal REF from the AC energizing power source 7 at a multiplier 15 to output a signal VX. This signal is then converted by an angle detector 9 into the AC electric signal VLAC corresponding to the position thetaL of a radar antenna 14, and the converted signal is compared with the signal VX by a comparing circuit 3, which outputs an AC signal proportional to the difference of the signal VLAC from the signal VX. This AC signal proportional to the angle difference is converted by a demodulating circuit 10 into a proportional DC signal, which is inputted to a signal converting circuit 4. Consequently, the position OL converges on the value corresponding to the position thetaL from the position source 1. |
