共查询到20条相似文献,搜索用时 31 毫秒
1.
2.
Multivariable PI Type Generalized Predictive Control 总被引:4,自引:1,他引:3
《系统工程与电子技术(英文版)》1998,(2)
1.INTRODUCTIONTilegelleralizedPredictivecontrolorGPC(Clarkeetal,1987)hasgainedwidespreadac('('1)tall('cillilldllstryaswellasinacademia.Experimentalstudiesandpracticalapplicationshave(lelllollstratedtherobustnessofthecontroller.Exceptformuchaworkdealtwithsillgle-illplltsillgle-output(SISO)linearsystems,peoplealsoextendedGPCtomulti-inputllnllti-olltput(MIMO)linearsystem.Kinnaert(1989)proposedthemultivariableGPCbasedoilt,lleCARIMAmodel.Inanote,Scattolini(1992)presentedtheclosed-lo… 相似文献
3.
变频调速-变量泵复合调节液压系统仿真研究 总被引:5,自引:0,他引:5
在建立交流异步电机矢量控制、液压容积控制系统数学模型的基础上,建立在MATLAB/Simulink环境下的电气采用simpowersys库函数建模,液压采用传递函数联合仿真模型,实现变频调速和变量泵联合仿真,并进行仿真实验研究,结果表明采用复合控制,能提高系统的响应性能且节能,并指出系统发展应用的方向。 相似文献
4.
利用对象输出信息的预测控制新算法 总被引:4,自引:0,他引:4
本同了一种利用对象输出信息的预测控制新算法,此算法需调整的参数少,比PID参数容易整定;此算法的计算量少,能用于愉速过程的控制;此算法的鲁棒性好,能用在线性与非线性系统中;经仿真试验证明控制效果很好。 相似文献
5.
A new adaptive quasi-sliding mode control algorithm is developed for a class of nonlinear discrete-time systems, which is especially useful for nonlinear systems with vaguely known dynamics. This design is model-free, and is based directly on pseudo-partial-derivatives derived on-line from the input and output information of the system using an improved recursive projection type of identification algorithm. The theoretical analysis and simulation results show that the adaptive quasi-sliding mode control system is stable and convergent. 相似文献
6.
具滞后的区间Lurie型系统的鲁棒绝对稳定性 总被引:9,自引:1,他引:8
讨论了具滞后的区间非线性Lurie型控制系统的鲁棒绝对稳定性。用区间向量不等式、Lyapunov函数法和Riccati方程法研究了具滞后的区间Lurie型直接控制系统和具滞后的区间Lurie型间接控制系统的鲁棒绝对稳定性,得到了具滞后的区间非线性Lurie型控制系统鲁棒绝对稳定的一些充分条件,并给出了数值例子说明本文结论的有效性。 相似文献
7.
当今,科技的发展给人类的生活带来了极大的便利,但也给社会造成了一定的危害,为了遏止科技的一些负面效应,需要我们对科技进行社会控制,即构建一个行之有效的科技~社会控制系统。该系统由政策和法律控制、组织控制、市场控制和道德控制四个部分组成,这四个组成部分相对于整个系统来说是子系统,它们各有自己的特点、结构和功能,并且整个系统的运行还呈现出目的性、非线性和线性统一和可控性的原则。 相似文献
8.
9.
Yifan Xing Jun Wu Institute of Cyber-Systems Control Zhejiang University Hangzhou P.R.China 《系统工程与电子技术(英文版)》2011,(6):975-981
A new method to design a quantum controller which directly controls the probability density function(PDF) of quantum systems is proposed.Based on the quantum model from the PDF perspective,two specific control algorithms are proposed with uniform and non-uniform fields,respectively.Then a detailed control algorithm with convergence analysis is given for the small error case.By appropriately estimating the selected Lyapunov function,more accurate control effect is achieved.The proposed scheme provides a constructive method to find appropriate parameters for controller design. 相似文献
10.
11.
为了降低加入自适应控制后被控系统的复杂程度,同时使被控系统在发生故障时仍具有良好的性能,提出了故障检测加自适应重构控制的方法,在系统无故障的情况下不加入自适应重构控制,使系统相对简单,同时对系统进行故障检测;当检测到系统发生故障时,加入自适应重构控制,使系统具有良好的性能。采用的故障检测方法和切换开关既简单又有效。通过对一个飞控系统的仿真研究,表明了该方法的有效性。 相似文献
12.
The problem of decentralized adaptive fuzzy control for a class of time-delayed interconnected nonlinear systems with unknown backlash-like hystersis is discussed. On the basis of the principle of variable structure control (VSC) and by using the fuzzy systems with linear adjustable parameters that are used to approximate plant unknown functions, a novel decentralized adaptive fuzzy control strategy with a supervisory controller is developed. A general method, which is modeled the backlash-like hysteresis, is proposed and removes the assumption that the boundedness of disturbance, and the slope of the backlash-like hystersis are known constants. Furthermore, the interconnection term is supposed to be pth-order polynomial in time-delayed states. In addition, the plant dynamic uncertainty and modeling errors are adaptively compensated by adjusting the parameters and gains on-line for each subsystems. By theoretical analysis, it is shown that the closed-loop fuzzy control systems are globally stable, with tracking error converging to zero. Simulation results demonstrate the effectiveness of the approach. 相似文献
13.
Some existing methods for chaos control in engineering fields are analyzed and their drawbacks are pointed out. A tracking method can solve these problems to some extent, but it still depends on the mathematical model of the system to be controlled. An intelligent method based on fuzzy neural network (FNN) is used to control chaos in engineering fields. The FNN is employed to learn the inherent dynamics from the input and output of chaos, which can be used in the inverse system method, so that the method is free of the exact mathematical model of the system to be controlled. This intelligent method is compared with tracking method in the presence of measurement noise and model error. Simulation results show its superiority and feasibility. 相似文献
14.
在神经网络在线学习控制中 ,实时性和控制精度是非常重要的两大指标。提出的一类具有多维存储结构的CMAC网络 ,提高了网络的泛化能力和学习速度。利用这一网络 ,针对不确定性机器人系统 ,考虑其标称模型 ,提出了一种新的实时智能补偿控制策略 ,并利用Lyapunov方法得出了系统全局渐近稳定的充分条件和网络学习律。在该控制策略中 ,系统的控制输入由两部分组成 :基于标称模型的计算力矩及补偿输入 ,其中补偿输入为系统标称惯性矩阵与神经网络输出的乘积。最后给出了仿真实例来说明该控制策略的有效性 相似文献
15.
针对一类非线性系统,利用模糊逻辑提出一种鲁棒自适应控制方法.首先证明在一定的条件下,闭环系统必能稳定,并证明这个条件即必落人某一紧集中成立,同时考虑其控制性能,选择鲁棒控制量,使跟踪误差达到要求的性能指标. 相似文献
16.
在切换系统最优控制的框架下,讨论了挠性卫星的姿态控制问题。首先,根据挠性卫星姿态调整的运动模型,同时考虑两种执行机构的控制作用,将卫星的姿态控制问题转化为一种切换控制问题,并在能量最小性能指标下讨论其最优控制问题。其次,基于粒子群优化算法和Powell算法给出了求解最优切换时间问题的完整优化算法。最后,以3阶挠性卫星系统为例,给出了具体仿真算例,验证了所提算法的有效性。 相似文献
17.
基于短期AGC指令的负荷系统预见预测控制 总被引:1,自引:0,他引:1
针对目前火力发电单元机组负荷增减频繁、扰动因素较多的情况,在充分利用自动发电挂制(AGC)的负荷指令资源的基础上,提出一种协调控制系统的负荷预见预测控制方案。该方法以多变量预测控制为核心,将预见控制思想融入到预测控制的设计之中,从而构成一种新的负荷协调控制策略。仿真结果表明,该方法集预测控制、预见控制二者的优点,使得机组负荷具有良好的跟踪性能,主蒸汽压力也具有很好的系统动、静态调节品质,而且控制量变化非常平稳,在对象动态特性较大范围内变化的情况下,系统具有较强的鲁棒性。 相似文献
18.
19.
20.
Novel evaluation method of TCP performance over satellite links 总被引:1,自引:0,他引:1
Wang Lina~ & Gu Xuemai~ . Information Engineering School Univ. of Science Technology Beijing Beij ing P.R.China . Communication Research Center Harbin Inst. of Technology Harbin P.R .China 《系统工程与电子技术(英文版)》2006,17(2):462-467
1 .INTRODUCTIONIn recent years , much attention has been paid tothe efficient application of transmission control pro-tocol ( TCP) to satellite environments[1 ~3]. TCPhas been developed for wired networks that have alower delay and a very low bit error rate .It is themost commonly usedtransport layer protocol intheInternet and provides reliable and end-to-end com-munication services for applications . TCP conges-tion control and error control mechanisms will besignificantly influenced … 相似文献