The block diagram of an antenna control system is shown belo

The block diagram of an antenna control system is shown below Let T=0.05 seconds For the system shown above perform the following: find the system phase margin with D(z) = 1 and K = 1. set K=12 and design a phase-lag controller with dc gain of 1 that yields a 45Degree system phase margin.

Solution

Antenna control unit:

Antenna control unit (ACU) by the data acquisition card, D / A (digital / analog) converter card, network card, general industrial control computer and design their own circuit boards, antenna control software installed in the ACU. ACU is a core part of the tracking control system, mainly to complete the task of tracking the automatic monitoring, data processing, coordination and control devices within the system to complete the target precision tracking, complete motion attitude control antennas and real-time computing and implementation of control strategies, At the same time recording information for each measurement, analysis and display, management subsystem to report to the station control equipment status information and antenna angle.