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Study Experience and System of Optimal Preview Control of Tracking Space Object Trajectory

Author: WuZuo
Tutor: TanYueGang
School: Wuhan University of Technology
Course: Electrical control and automation technology
Keywords: Optimal Preview Tracking Control Multi-axis controller Precise positioning platform Tracking Experimental study
CLC: V556
Type: Master's thesis
Year: 2006
Downloads: 251
Quote: 1
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Abstract


Optimal tracking control algorithm is a foreseeable utilization in the past, present and future information on control methods. It has a high tracking accuracy, robustness, and a certain ideal response speed and stability. This paper details the optimal linear systems derived tracking control algorithm foreseen basic theory of error it uses the expanded system as a state variable, the performance evaluation function which considering the tracking error and the control input of the change and future of the use of the target locus information as a feedforward compensation, these measures makes the algorithm precise, effective and practical. Then the paper also uses differential optimization solution to calculate the optimal control input, a simplified process. Articles by target trajectory decomposition, and then were to be tracking control method to study the optimal control algorithm foreseen practical performance, so in subsequent studies were designed a tracking control experiment system. The system is multi-axis controller core, the executing agency is driven by servo motor to achieve high-precision positioning platform. These measures have a strong linkage system performance, and have fast response speed and high precision of execution, for the experimental analysis provides a good material support. In the experimental system design is complete, the theoretical analysis and experimental set up based on its mathematical model. And the use of improved mathematical models predicted optimal control theory simulation. Simulation results show that the algorithm is theoretically correct and reliable. But it has also exposed the simulation process is not perfect place in the algorithm involves the use of a series of parameters before initialization problem. These values ??are accurate or not the use of the algorithm has a direct impact, which the use of algorithms in practice will have a greater impediment. Papers in these areas have made a thorough research to establish a set of effective solutions. Finally, the simulation results of the analysis as an input to the system studied experimentally. Analysis of the experimental results showed that the optimal preview tracking control algorithm used in the manufacturing requirements are not very high places is totally reliable. However, to use this algorithm in complex trajectory tracking, precise machining and other occasions also need pay attention to some important links. For example: large changes in the track where you need to track the motion segment further subdivided; implementing agency must have strong immediacy, better commutation performance; Programmers need to avoid low priority, take a long time to calculate methods.

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CLC: > Aviation, aerospace > Aerospace ( Astronauts ) > Ground equipment, test site, launch sites, space base > Ground-based measurement and control system
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