Study Experience And System Of Optimal Preview Control Of Tracking Space Object Trajectory

The optimal preview tracking control algorithm is a kind of algorithms that utilize synthetically the information in the future , now and the past. It has great trajectory tracking precision , good robustness and ideal response speed, stability. The thesis detailedly deduce optimal preview tracking control basic theory that applied in the linear system,it make enlarged error system become new state variable. In the evaluation function, the theory think of both tracking error and control input change, it also make future information of the object trajectory become feedforward compensation. In the thesis, we make use of differential optimal function to simplify the procedure of getting optimal control input, it make the algorithm more practical.The thesis decompound object trajectory, and then respectively tracking to research practicability of the optimal preview control algorithm, so the thesis design a set of tracking control experiment system. The system make the Universal Motion Automation Control (UMAC) the core. The actuating mechanism be made up of servo motor and precise position platform, they have ideal response speed and command response precision.The thesis establish the mathematical model of the experiment system on the basis of theory analysis and experiment, and then emulate the system. The result indicate the algorithm is mature basically in theory. But the result also indicate the algorithm has some problems that involve parameters initialization. It directly affect the precision of the algorithm utilization, and it also restrict the algorithm utilizing in practical manufacture. The paper make some research in practicing.Finally, the thesis experiment with the emulate result. The experiment result indicate the optimal preview algorithm is practical when working accuracy don't be strictly limited. But some details need to be paid attention if the algorithm is applied in the field of complex trajectory tracking , accuracy manufacture and so on. For example, the motion need to be divided into some short motion segments when the trajectory change rapidly, the executing system ought to have great instantaneity, direction changing, and the program need to avoid the methods that hold some time to calculate ,or the method has low priority level.