Servomechanism for Antenna Azimuth Control

This example shows the simulation of a servomechanism for antenna azimuth control using

QFIRE Studio

.

Introduction

An antenna positioning system [1] can be represented by:

G(s)=0.100041s2+0.100041sG(s) = \frac{0.100041}{s^{2}+0.100041s}
Simulation

For the system G(s), it was designed a discrete control system aiming an overshoot less than 16% and a settling time less than 10s. This controller is represented by:

C(z)=12.8×z0.883z+0.5C(z) = 12.8\times\frac{z-0.883}{z+0.5}

Figure 1 - Transfer function 

C(z)C(z)
  in block diagram

The system in Figure 1 was set in a

QFIRE CTR-101

with sampling period T=1s.

Figure 2 - Control system of an antenna positioning system

As a result, the plant is stabilized as in Figure 3.

Figure 3 - Unit-step response of the closed-loop system in Figure 2

Bibliographic References

[1] Gene F. Franklin,  

DIGITAL CONTROL OF DYNAMIC SYSTEMS

, Third Edition, 1998.

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