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首页> 美国政府科技报告 >Microcomputer-Based Adaptive Control for Nuclear Steam Generator Water Level Control. Final Report for the Period 1 July 1987 - 30 June 1988
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Microcomputer-Based Adaptive Control for Nuclear Steam Generator Water Level Control. Final Report for the Period 1 July 1987 - 30 June 1988

机译：基于微机的核电蒸汽发生器水位控制自适应控制。 1987年7月1日至1988年6月30日期间的最后报告

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A new approach is proposed here for the level control of steam generators through a weighted one-step-ahead stochastic self-tuning algorithm. The complicated steam generator model is represented by four parameters: water level, feedwater flow, steam flow and stochastic disturbances. A set of time series difference equations are obtained by combining these parameters and the measurements of water level, feedwater flow, and steam flow. These parameters are determined by a recursive least squares algorithm and d-step-ahead optimal prediction of output. This algorithm contains a forgetting factor which can be used to account for an exponential decay of past data in tracking a slow drift in the parameters. Control input is calculated by using the time series difference equation so that the d-step-ahead optimal prediction of output may equal desired output. An additional integral action controller is adopted optionally to compensate for the steady-state offset which comes from non-zero mean disturbances or control input weighting. The experimental loop, which is a mock-up of the secondary loop of the nuclear power plant, is used to prove the effectiveness of the present adaptive control algorithm. It can be concluded from experimental results that the present weighted d-step-ahead stochastic control scheme is robust and more effective than perfect controllers or PI controllers. 6 refs, 10 figs. (Atomindex citation 20:016337)

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