共查询到19条相似文献,搜索用时 171 毫秒
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本文将BP神经网络算法与PID控制结合,优化了中子发生器控制离子源阳极电流PID调节过程,实现了控制器自适应整定,提升了控制效果。基于离子源阳极电流控制模型改进了PID算法,通过MATLAB/Simulink软件对两种算法进行仿真并对比分析。通过LabVIEW控制并采集离子源阳极电流值,使用改进后的BP神经网络PID算法控制程序进行实验。经实验表明,BP神经网络PID对离子源阳极电流控制能够实现参数的自适应整定,相比传统PID控制器超调量更小、响应速度更快,提高了中子发生器的控制稳定性。 相似文献
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针对稳压器动态过程的特点,结合比例-积分-微分(PID)控制以及模糊控制的优点,合理选取控制参数,设计了一套PID控制联合模糊控制系统,对稳压器动态过程进行控制.仿真结果表明,与传统PID控制系统及单纯模糊控制系统相比,两种控制系统相结合可以得到更佳的控制效果. 相似文献
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采用模糊PID控制算法,根据HI-13串列加速器头部电压控制的实际需要设计了PID控制参数模糊化计算方法,实时获得了头部电压PID控制参数,并根据控制参数计算得出实际的头部电压控制量。根据设计的模糊PID控制算法设计了HI-13串列加速器头部电压稳压计算机控制模块,并进行了实验研究。实验结果表明,与普通PID控制方法相比,采用模糊PID控制算法的HI-13串列加速器头部电压控制过程具有控制精度高、更快达到稳态的优点,可改善HI-13串列加速器高压系统的性能。 相似文献
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针对传统开环控制的放射性气溶胶采样器存在采样误差较大、采样流量控制精度低、采样流量不可控等问题,设计了可恒流采样的放射性气溶胶采样器。该采样器在ARM嵌入式系统的硬件环境下,将模糊控制和PID控制结合起来构成模糊自整定PID控制器,动态优化PID参数,从而对风机的输出功率进行及时、准确调整,达到使采样器采样流量恒定的目的。测试结果表明:该采样器瞬时流量响应时间小于7 s;瞬时流量测量误差小于±1%;累积采样体积误差小于±3%。 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
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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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This paper introduces a fuzzy proportional-integral-derivative (fuzzy-PID) control strategy, and applies it to the nuclear reactor power control system. At the fuzzy-PID control strategy, the fuzzy logic controller (FLC) is exploited to extend the finite sets of PID gains to the possible combinations of PID gains in stable region and the genetic algorithm to improve the ‘extending’ precision through quadratic optimization for the membership function (MF) of the FLC. Thus the FLC tunes the gains of PID controller to adapt the model changing with the power. The fuzzy-PID has been designed and simulated to control the reactor power. The simulation results show the favorable performance of the fuzzy-PID controller. 相似文献
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反应堆功率控制系统的设计与核电厂的安全性和经济性息息相关。为提高其功率控制性能,本研究以某压水堆核电厂为研究对象,建立了其非线性动态数学模型,推导了其状态空间模型;采用线性二次型高斯(LQG)最优控制方法,设计了堆芯功率控制器;进一步基于遗传算法NSGA-Ⅱ对LQR权重系数进行了多目标优化;将本文所设计的控制器与传统PID控制器进行了典型工况的仿真对比。结果表明,与传统PID控制器相比,基于NSGA-Ⅱ方法优化的LQG控制器不但响应快速、控制精度高、稳定性好,而且具有良好的鲁棒性,能获得更优越的堆芯功率控制效果。 相似文献
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液态熔盐堆采用熔融氟化盐为燃料,燃料熔盐出口温度是衡量熔盐堆安全的重要指标。通过堆芯功率控制可实现燃料熔盐出口温度控制。将液态熔盐堆堆芯划分成内区和外区,并基于能量守恒原理建立堆芯非线性模型,采用微扰理论对非线性模型进行线性化。基于堆芯线性化模型,采用模糊比例-积分-微分(PID)控制器设计堆芯功率控制系统。以熔盐增殖堆(MSBR)为例,开展堆芯功率控制仿真。结果表明,引入10-3、2×10-3阶跃反应性时,模糊PID控制器可以减小系统响应的上冲幅度和超调量,并且在堆芯功率发生了较大的负荷变化时,模糊PID控制器可以对堆芯功率的变化实现良好跟踪。故所采用的模糊PID控制器具有良好的动态性能,可实现对堆芯功率的良好控制。 相似文献
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Nuclear fusion is one of the newest and most promising clean and safe energies hence, it imposes a new research area of control. In this paper, the design of a multivariable adaptive proportional-integral-derivative (PID) controller for the control of the plasma current, shape and position to ensure the safe operation of the fusion reactor is successfully developed. The recursive least square algorithm is used in an alternative way as an adaptation mechanism for tuning PID controller gains. Since stability is a vital issue in the evaluation of control systems, therefore stability analysis of the proposed controller is developed using the Lyapunov stability theory. The main objective of plasma current, shape and position controller in fusion reactors is to improve the stability and the performance of tokamak magnetic systems without contravening the limits imposed by the actuating coils voltages physical limitations. The proposed APID (adaptive PID) controller tunes online its parameters to cope with the presence of the disturbance or any parameters changes occur during the operation. The results of the proposed APID on a simulation code of a tokamak show a noteworthy improvement with respect to those obtained with other control techniques in the cases of changing the initial controller gains, adding disturbance signal and variation in the reactor model parameters. 相似文献