共查询到17条相似文献,搜索用时 46 毫秒
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针对核反应堆变功率过程中系统的非线性和反应性增量约束问题,本文将具备模型参数自适应辨识能力的改进型广义预测控制器(JGPC)应用于堆芯功率控制,该控制器通过预测模型参数和递推关系计算未来时刻的预测输出值,同时采用经正弦混沌策略和非线性惯性权重改进的混沌粒子群算法(CPSO)进行滚动优化,在优化过程中通过设定优化边界和混沌策略来处理反应性约束;以堆芯功率的受控自回归积分滑动平均模型(CARIMA)作为预测模型,并采用遗忘因子递推最小二乘法(FFRLS)自适应辨识模型参数,以克服堆芯功率模型非线性。基于MATLAB平台对本文控制器进行仿真验证,结果表明,该控制器在满足约束条件的情况下,能使堆芯功率快速、稳定地跟随设定值,且具备一定的抗干扰能力。 相似文献
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In view of the nonlinear and reactive constraint of nuclear reactors in the process of variable power, this paper proposes an improved generalized predictive control (JGPC) for core power control. The JGPC calculates the predicted output value by predicting the model parameters and recursive relationships. At the same time, chaos particle swarm optimization (CPSO), which is improved by the sinusoidal chaos strategy and nonlinear inertia weight, is applied to the rolling optimization of JGPC. In the process of optimization, the reactive constraint are dealt with by setting optimization boundary and chaos strategy. The controlled auto-regressive integral moving average (CARIMA) model of core power is established as the JGPC prediction model, and the forgetting factor recursive least squares (FFRLS) method is used to identify the model parameters online. The JGPC controller is simulated and validated based on MATLAB platform. The results show that the controller can make the core power follow the set value quickly and steadily under the condition of satisfying the constraint, and has a certain anti-interference ability. 相似文献
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采用传统比例-积分-微分(PID)控制器开展堆芯功率控制,控制过程中存在超调量大、调节时间长的问题。为解决这一问题,基于堆芯传递函数模型,采用T-S型模糊规则对比例-微分(PD)控制器、PID控制器、模糊控制器进行加权及切换,设计T-S型模糊切换控制器。以铅冷快堆堆芯功率控制为例,建立堆芯功率T-S型模糊切换控制系统,开展堆芯相对功率设定值阶跃、堆芯冷却剂进口温度扰动仿真。结果表明,基于堆芯传递函数模型设计的T-S型模糊切换控制器可以实现对堆芯功率的良好控制。 相似文献
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液态熔盐堆堆芯系统具有非线性、时变性等特点,模糊比例积分微分(PID)控制技术因初始论域不能跟随误差变化而伸缩,使得系统的控制精度降低,故设计了一种基于变论域模糊PID控制器的堆芯功率控制策略。以熔盐增殖堆MSBR堆芯为例,在堆芯入口温度扰动或堆芯反应性扰动下,使用Matlab/Simulink对PID控制、模糊PID控制与变论域模糊PID控制下的效果进行仿真对比。结果表明,基于变论域模糊PID控制器建立的堆芯功率控制系统响应速度更快,超调量更小,控制效果更佳。 相似文献
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核反应堆中子通量密度的广义预测控制方法研究 总被引:2,自引:0,他引:2
将核反应堆中子动力学系统的数学模型变换成一种受控自回归积分滑动平均(CARIMA)模型,在此基础上,提出了中子通量密度的广义预测控制方法。该控制律能有效消除不确定干扰和非线性因素对系统的不良影响,提高系统的控制精度和动态品质。通过计算机仿真比较,证明了该方法优越于古典控制方法。 相似文献
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《Journal of Nuclear Science and Technology》2013,50(12):859-868
This paper concerns the application of the decoupling theory for a nonlinear system to the power control of the coupled core reactor. By using this theory, we can deal with the power change problem, the regulating problem for a system subject to a large perturbation, etc., which cannot be dealt with by the decoupling theory for a linear system. But, since this theory assumes tacitly that all the states are measurable, the theory can not be applied directly to the nuclear reactor that has nonmeasurable state variables such as the delayed neutron precursor. In this paper, the above difficulty is overcome by introducing the observer theory for a nonlinear system. The decoupling controller and observer resulted from these theories are applied to the coupled core reactor and the dynamic characteristic of the reactor is simulated by the digital computer. The simulation shows that the reactor power of each core is controlled satisfactorily in decoupling manner. 相似文献
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The traditional PID controller is used to control the core power, which has the problems of large overshoot and long regulating time in the control process. In order to solve this problem, based on the core transfer function model, the PD controller, the PID controller and the fuzzy controller are weighted and switched by T-S fuzzy rules, and T-S fuzzy switching controller is designed. Taking the core power control of a lead cooled fast reactor as an example, a T-S fuzzy switching control system of the core power is established to simulate the relative power setpoint value step and the core inlet coolant temperature disturbance. The results show that the T-S fuzzy switching controller designed based on the core transfer function model can achieve a good control of the core power. 相似文献