As a high-precision servo motion platform, the dual-stage lithographic system uses lots of long-stroke air-bearing linear
motors to achieve rapid positioning. Residual vibration, resulting from direct drive, almost zero damping, parallel
decoupling structure and high velocity, leads to too long settling time and is one of the key factors in slowing the speed of
positioning. To suppress the residual vibration and realize the high positioning precision in shorter settling time, this paper
designs feedforward controller with input shaping algorithm for the rotary motor. Traditional input shaper is sensitive to
system models and it is very difficult to get the parameters. A parameter self-learning method based on PSO(Particle
Swarm Optimization) is proposed in this paper. The simulation of the system is performed by MATLAB/Simulation. The
experimental results indicate that the input shaping algorithm proposed in this paper brings about significant reduction in
the positioning time of the dual-stage.
KEYWORDS: Motion controllers, Data acquisition boards, Control systems, Field programmable gate arrays, Data acquisition, Lithography, Control systems design, Connectors, Human-machine interfaces, Clocks
As a widely used open-architecture computer bus ,VME bus is increasingly applied in military, aerospace, transportation and other large-scale control systems. Lithography, a very delicate and complicated integrated circuit manufacturing equipment, uses many circuit boards with VME interface in its control system, including one single-board computer, many movement control boards and one data acquisition board. This paper designs communication modules which include VME bus module and VME user-defined bus module for multi-boards in Lithography control system. VME bus module is designed for the communication between the single-board computer and movement control boards and VME user-defined bus is designed for the communication between movement control boards and data acquisition board. The experimental results demonstrate its effectiveness.
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