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TECHNIQUE TO IMPROVE PAPER MACHINE CROSS- DIRECTIONAL MODEL PREDICTIVE CONTROL PERFORMANCE BY CREATING A MEASUREMENT PROFILE REFERENCE TRAJECTORY
TECHNIQUE TO IMPROVE PAPER MACHINE CROSS- DIRECTIONAL MODEL PREDICTIVE CONTROL PERFORMANCE BY CREATING A MEASUREMENT PROFILE REFERENCE TRAJECTORY
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机译:通过创建测量配置文件引用轨迹来改善纸机横向模型的预测控制性能的技术
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摘要
Controlling a multiple-array, sheetmaking cross-directional process with a multivariable model predictive controller (MPC) employs a cost function incorporating a prediction horizon. The MPC provides a measurement profile target reference trajectory over the prediction horizon of the MPC cost function. Improved CD-MPC performance is achieved by employing a measurement profile target reference trajectory over the prediction horizon in the MPC cost function. A series of target profiles creates a reference trajectory to bring the cross-direction measurements smoothly from their current profile to the final target. By carefully designing the reference trajectory, the CD-MPC exhibits a good measurement response without aggressive control action. The current measurement target profile can be filtered through a first order plus deadtime process at each controller update and repeating the filter operation once for each step of the MPC prediction horizon generates a full reference trajectory for the profile.
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