生物质厌氧消化过程建模及控制算法研究
首发时间:2015-04-03
摘要:随着生活水平的提高,居民直接或间接产生的生物可降解生物质越来越多,因此带来的环境问题也日渐严重,严重影响国家的可持续发展。目前,处理生物可降解生物质的方法很多,而厌氧消化法既能消除生物质有机垃圾带来的环境问题,又能回收能源,是其中经济、有效与环境友好的处理方法。然而,厌氧消化过程是一个复杂的非线性过程,其精确数学模型很难得到;传统的控制方法性能大多依赖于被控系统数学模型,为了满足日益提高的控制性能要求,需要不断研究和设计不依赖于被控系统数学模型的现代控制方法。因此本文针对现有厌氧消化过程难以建模、系统参数复杂等难点,提出了一种仅采用系统输出的基于微分代数估算的自适应控制器(Differential Algebraic Estimation based Adaptive Controller,DAEAC)。该控制器具体由基于迭代无模型控制的稳定子控制器与基于微分代数估算(Differential Algebraic Estimation, DAE)的补偿子控制器组成。最后,通过Matlab/Simulink的数值仿真,验证了该控制方法的性能。
关键词: 厌氧消化 基于微分代数估算自适应控制器(DAEAC) 迭代无模型自适应控制器
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Biomass Anaerobic Digestion Process Modeling and Control Algorithm Research
Abstract:In recent years, with living conditions' improvement, more and more biodegradable organic are made by people directly or indirectly. Therefore, their caused environmental problems have became more serious effects on the country's sustainable development. Currently, anaerobic digestion is one of ways to process biodegradable organic waste, which can not only eliminate the environmental problems, but also recycle energy, and is one of the economic, efficient and environmental friendly approaches. However, anaerobic digestion process is a complex nonlinear process with many parameters in model difficult to identified. The traditional control methods which rely on mathematical models are not able to meet the increasing performance requirements, promote researchers to study permanently modern control design methods which are free of pants mathematical models. Therefore in this paper under this scheme, we propose a Differential Algebraic Estimation based Adaptive Controller (DAEAC) which relies only on plant output and is composed of a Differential Algebraic Estimation (DAE) based compensation sub-component and a Recursive Model Free Controller (RMFC) based stabilization sub-component. Finally, the effectiveness of the proposed method is validated via Matlab/Simulink based numerical results.
Keywords: anaerobic digestion (AD) differential algebraic estimation based adaptive controller (DAEAC) recursive model free controller (RMFC)
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