Research on Computer Control Strategy for Optical Electric Tracking System

摘要

In this paper, mathematic model and computer control strategy for optical electrical tracking system have been researched and discussed. First, the system's structure and its work process have been analyzed. Second, according to the system's moving law, the system's mathematic model has been built. As to the computer control strategy, trigger guiding, two closed loop PID control method as well as compound control method have been applied to satisfy the tracking accuracy. Third, we apply the bilinear transformation to get the digital system, and the sample time is 800Hz. The simulation results indicate that the maximum tracking error can be limited to less than 0.5° and the regulator time can be 0.04s. Then the control project resonance frequency should be more than 200Hz and the sample frequency should be more than 400Hz to meet the control accuracy requirement. So we can conclude that the system indexes such as swiftness, high accuracy as long as real time have been satisfied. And the requirement of mechanical property has been present which is very useful to mechanical working.