直流马达调速系统的变结构控制*

本文着重阐述直流马达调速系统的变结构设计。研究表明,这种系统不仅具有良好的静态和动态工作特性,系统本身还具有良好的“鲁棒”性,这是优于传统设计方法的。     

双闭环直流调速系统模糊PID控制研究*

针对电压和负载扰动导致传统PID控制双闭环直流调速系统性能下降的问题,本文提出一种模糊PID控制方法。本文的控制方法根据调速系统的转速偏差e和偏差变化率ec,经过模糊逻辑推理,动态自适应调整PID控制器的三个参数,能够有效提高系统抗扰动能力。为了对两种控制方法的性能进行比较分析,文中对系统在理想空载状态、负载扰动和电压波动三种情况下进行仿真试验。结果表明两种控制方法在理想空载状态下的稳态性能基本相同。在负载扰动和电压波动的情况下,本文的方法能使系统更快恢复到平衡状态,且具有更小的转速降。因此,本文的控制方法能够保证系统具有较好的动态性能和抗扰性能。     

直流调速系统的智能控制

本文介绍了产生式规则控制,模糊控制,模糊-PI混合控制,以及改进模糊控制的设计思想和实例。分析研究和实验结果表明,在缺乏对象数学模型的情况下,直流调速系统的智能控制是成功的。     

基于FPGA的直流无刷电机调速系统的设计

介绍基于FPGA芯片的直流无刷电机调速系统的设计方法,讨论了调速系统的硬件结构、软件结构及控制方法的设计及实现。对利用霍尔传感器信号进行测速的问题进行了分析,并给出一种结合FPGA特点的电机转速的解算方法。实验表明,该设计方法性能稳定,调速性能良好。     

直流调速系统的模糊／PID控制器设计

本文采用模糊/PID控制策略对直流调速系统的转速环进行了设计,根据转速误差的阀值由模糊控制切换到PID控制,给出了模糊控制规则和PID控制器各参数确定的方法,并利用Matlab进行了仿真验证,结果表明模糊/PID控制器具有较好的控制性能。     

带外扰观测器补偿装置的双通道LQSF调速系统的鲁棒性

带外扰观测器的双通道系统,当被控对象参数波动时,系统稳定性可能急剧恶化.本文在模拟机仿真的基础上,对一种双通道调速系统的稳定参数域进行了研究,提出一种工程估算方法--"参数相对摄动法"--计算参数波动范围和系统稳定性的关系;并可用来分析参数波动对静差的影响.文章对外扰观测器的参数整定方法也作了讨论.     

可逆直流调速DDC系统

本文主要叙述了双闭环逻辑无环流可逆直流调速单板机全数字直接控制系统的构成、软件的设计,(包括 PI 数字调节器,数字触发器,逻辑切换装置,反馈量的滤波、外堆、微分处理,锁零等)实验结果分析。本系统的特点是采用了数字触发器,节省模拟触发器的较多硬件。再一优点是采用了模拟、数字光电隔离电路,调试中安全可靠,便于现场应用。     

可控硅直流调速系统电路设计

在可控硅直流调速系统中,电动机是调速对象,转速ｎ是被调量。在调速系统中采用反馈控制,目的在于减小转速降,提高机械特性的硬度,调速幅度也因此而提高。图１电路是同时采用电压负反馈和电流正反馈的自动调速系统,属小功率晶闸管直流调速系统。虚线以上是主电路,虚...     

单板机直流PWM调速系统

由於自动化水平的提高,对直流变速传动装置的精度、性能提出了新的要求。传统的模拟控制装置不能满足要求,需要采用数字控制,但对于运行时间及运行速     

ROBUST CONTROLLER DESIGN AND EXPERIMENTAL VERIFICATION OF I.C. ENGINE SPEED CONTROL

Presented in this paper is the robust idle speed control of a Ford 4⋅6 L V-8 fuel injected engine. The goal of this investigation is to design a robust feedback controller that maintains the idle speed within a 150 rpm tolerance about 600 rpm despite a 20 Nm step torque disturbance delivered by the power steering pump. The controlled input is the by-pass air valve which is subjected to an output saturation constraint. Issues complicating the controller design include the nonlinear nature of the engine dynamics, the induction-to-power delay of the manifold filling dynamics, and the saturation constraint of the by-pass air valve. An experimental verification of the proposed controller is included. © 1997 by John Wiley & Sons, Ltd.     

具有鲁棒极点区域的连续控制系统设计

本文提出了多变量控制系统设计的一种新方法,并给出了该方法的实现条件.利用该方法设计控制系统,可使得闭环系统的极点全部位于复平面左半平面的一个矩形区域内,且该区域的边界对于系统参数摄动具有最小的灵敏度.该方法可提供较多的自由度,具有很好的数值稳定性,且可适用于时变系统.数值例子说明,该方法对于一类多变量线性控制系统的设计是简单、有效的.     

ANALYSIS AND DESIGN OF FEEDBACK CONTROL SYSTEMS WITH TRACKING ERRORS SQUARE

In this study, a command tracking error square control scheme is first proposed for analysis and design of feedback control systems. One of the tracking errors is low‐pass filtered and used in the feedback loop for gain adaptation; the other is used in the forward loop for command tracking control. The overall systems are nonlinear feedback systems, and can be reconfigured to an automatic gain control (AGC) loop with command tracking error input. The stability and robustness of the controlled systems are verified by time response, frequency response, and large parameter variation testing with a simple illustrating example and are finally applied to a complicated electro‐hydraulic velocity servo system with large load disturbance.     

ADAPTIVE CONTROL DESIGN FOR NONLINEARLY PARAMETERIZED SYSTEMS WITH A TRIANGULAR STRUCTURE

A novel adaptive backstepping design for a class of nonlinearly parameterized systems with a triangular structure is proposed. Under the Lipschitz condition with respect to unknown parameters of the system, an effective adaptive controller is designed without the requirement on the compactness of the unknown parametric set. Especially, the proposed adaptive control enables the advantage of “tuning function concept”, which results in only one estimation law for the unknown parameters. Our simulation with induction motor model particularly shows the viability of the obtained results.     

具有最小稳态误差的最优控制系统设计

稳态误差是控制系统设计中一项非常重要的性能指标，本文利用线性二次型（ＬＱ）最优控制系统设计中状态加权阵Ｑ的自由度，提出了一种具有最小稳态误差的ＬＱ最优控制系统设计方法。文中针对定义的稳态误差指标，推导其关于加权阵Q的梯度矩阵计算公式，从而将共轭梯度优化算法中非常有效的Beale算法和Armijo法则应用到设计方法中，给出了在计算机上易于实现的详细设计算法，通过实例仿真计算，验证了本设计方法的有效性，并获得了许多有意义的结果。     

MULTITUNING FUZZY CONTROL SYSTEMS DESIGN

A multituning fuzzy control system structure that involves two simple, but effective tuning mechanisms, is proposed: one is called fuzzy control rule tuning mechanism (FCRTM); the other is called dynamic scalar tuning mechanism (DSTM). In FCRTM, it is used to generate the necessary control rules with a center extension method. In DSTM, it contains three fuzzy IF-THEN rules for determining the appropriate scaling factors for the fuzzy control system. In this paper, a method based on the genetic algorithm (GA) is proposed to simultaneously choose the appropriate parameters in FCRTM and DSTM. That is, the proposed GA-based method can automatically generate the required rule base of fuzzy controller and efficiently determine the appropriate map for building the dynamic scalars of fuzzy controller. A multiobjective fitness function is proposed to determine an appropriate parameter set such that not only the selected fuzzy control structure has fewer fuzzy rules, but also the controlled system has a good control performance. Finally, an inverted pendulum control problem is given to illustrate the effectiveness of the proposed control scheme.     

基于无源性分析的鲁棒控制系统设计

给出不确定非线性系统鲁棒控制的一种设计方法.经校正网络将一微分算子传递给对象后,采用bang-bang控制使余下的部分无源化,并引入适当的符号跟随系统,使直输回路严格无源.于是全反馈控制系统具有很强的鲁棒性.同时讨论了系统稳定、不稳定、逆不稳定的各种情况的设计.     

基于无源性分析的鲁棒控制系统设计1)

An approach for the design of robust control for uncertain nonlinear systems is proposed.An appropriate differential operator is conveyed to the controlled plant by a network of cascade compensation,while its remained part is passivitized via optimum bangbang control.A proper signfollowing system is introduced to make the feedforward pass strictly passive.The whole feedback system is strongly robust.The cases for stable,unstable,inversely unstalbe plants are discussed.     

DECENTRALIZED ROBUST CONTROL DESIGN FOR A CLASS OF SIMILAR COMPOSITE SYSTEMS WITH UNCERTAINTIES

A class of similar composite systems is researched. The interconnections of systems are not symmetric and do not satisfy the matching condition. By means of the advantage of interconnections of systems, a two-step method is proposed to study the decentralized stabilization problem for the similar composite systems in this paper. First, the interconnections between subsystems are changed into a new form to satisfy the matching condition; second, based on the new form of the systems, the decentralized robust controllers are designed. In this paper, the controllers guarantee the similar composite systems quadratic stability. At last, the simulation of example is given.     

混合控制系统及其分析与设计方法

混合控制系统是指那些由实时产了系统和实时数值反馈子系统组成的系统，这类系统的特点是事件变量和时间变量的演化在不同系统内并行，实时地进行，本文基于对混合控制系统以往研究框架的分析，给出了混合控制系统的一个新框架，并提出了混合动态系统的分析和设计方法，混合控制系统的包括系统性能指标的分解，决策子系统的设计和实时数值反馈子系统的设计，其分析则分为离散时间域和离散事件域分析，文中采用了煤气炉系统作为例子说