预回控制方法研究

发布时间：2018-04-21 21:01

本文选题：控制理论 + 反馈控制　；参考：《天津理工大学》2017年硕士论文

【摘要】：随着科学技术的不断进步,针对实际物理系统的控制方法也不断地发展和完善,由传统的经典控制理论发展到了现代控制理论,并朝着大系统理论和智能控制理论方向发展。而相对各种控制理论及方法优劣的评价标准则始终没有变化,这就是被控系统的稳定性、精确性、快速性指标评价标准。现有理论方法由于实际系统的复杂性和时变性等原因在数学模型构建时遇到了困难,本文在对现有控制理论及方法的分析、比较和研究基础上,以现有理论成果为基础充分综合多种方法的优点提出了一种新的控制思路—预回控制方法。提出将控制器在系统中位置后移至执行元件前,使控制器中数学模型的复杂程度得以降低,从而降低数学模型的构建及解算难度。论文中将反馈量用于模型构型与模型参数识别及物理系统运动预测,提出在获取数学模型后通过合适的方法优化模型参数,并在系统工作过程中通过反复比较预测计算值与检测反馈值的差异不断进行数学模型完善,当可准确预测物理系统运动时对系统施以“适量”控制,以尽可能快速、准确的方式达到目标值。“预回控制方法”就是对这一控制策略的概括,因使用中“适量”控制多以导致物理系统产生“反向”运动趋势的思路获取,故称为预回。论文围绕预回控制方法的原理、效果、特点开展论述,用简单的小系统的反馈控制与预回控制情况进行了仿真比较,最后用液压系统的小位移步进行程控制实例进行了实验验证。
[Abstract]:With the continuous progress of science and technology, the control methods for practical physical systems have been developed and perfected, from the traditional classical control theory to the modern control theory, and to the large-scale system theory and intelligent control theory. However, the evaluation criteria for the merits and demerits of various control theories and methods remain unchanged, which is the evaluation criteria of the stability, accuracy and rapidity of the controlled system. Due to the complexity and time-varying of the actual system, the existing theories and methods are difficult to construct the mathematical model. Based on the analysis, comparison and research of the existing control theories and methods, this paper analyzes, compares and studies the existing control theories and methods. Based on the existing theoretical results, a new control method, prereturn control method, is proposed, which fully integrates the advantages of many methods. It is proposed that the position of the controller in the system be moved back to the executive element, so that the complexity of the mathematical model in the controller can be reduced, thus reducing the difficulty of constructing and solving the mathematical model. In this paper, the feedback is applied to model configuration, model parameter identification and physical system motion prediction, and a suitable method is proposed to optimize the model parameters after obtaining the mathematical model. In the working process of the system, the mathematical model is constantly improved by comparing the difference between the predicted calculation value and the detection feedback value. When the movement of the physical system can be accurately predicted, the system can be controlled by "appropriate amount", so that the system can be controlled as quickly as possible. Reach the target value in an accurate manner. The "pre-return control method" is the summary of this control strategy. Because the "moderate" control in use leads to the "reverse" movement of the physical system, it is called "pre-return". In this paper, the principle, effect and characteristics of the pre-return control method are discussed, and the feedback control and the pre-return control of a simple small system are simulated and compared. Finally, an example of small displacement step stroke control of hydraulic system is used to verify the experiment.
【学位授予单位】：天津理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TH137;TP273

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