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1.
指向镜控制系统的建模与设计 总被引：1，自引：0，他引：1
针对光电探测系统中常用的指向镜伺服系统,对其控制方法进行设计和仿真,构建了永磁同步电机的动力学模型. 确立了空间矢量脉宽调制的算法,并给出仿真模型和结果. 基于此系统进行了电流环、速度环、位置环的设计,采用位置前馈和重复控制器,最终得到一种易于实现、定位精度高的控制器. 理论分析和仿真实验证明,该控制器能够较好地改善伺服系统的动态特性,具有调节时间短、无超调和动态响应准确快速等优点,并能有效提高系统位置控制精度,所得结论对此类伺服系统具有一定的指导意义. 相似文献
2.
在要求高精度、快速响应的电动变桨伺服定位系统中,位置环采用单纯的比例调节器很难同时满足定位的快速性、高精度,以及位置的无超调。本文在位置环中采用了前馈控制器来满足电动变桨伺服系统定位的各项要求。通过MATLAB仿真结果表明,位置环采用前馈控制器,不仅可以实现无超调的准确定位,同时保证了伺服系统快速响应的动态性能。 相似文献
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鉴于混合式步进电机建模的复杂性,提出了利用模糊控制器实现对二相混合式步进电机位置伺服系统进行控制的方法,并详细介绍了位置模糊控制器的设计,并且对该控制方案进行数字仿真。仿真结果表明：该系统在指定转速范围内运行平稳,定位时间短,具有较好的性能。 相似文献
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分析直流-转速双闭环调速系统的工作原理与设计方法,重点对电流环和转速环的设计作说明,提出ASR （转速调节器）和ACR（电流调节器）的设计方案,并在Matlab软件上进行仿真调试,实现系统的转速无超调。 相似文献
5.
由于转速负反馈和电压负反馈调速系统中只有一个反馈闭合回(环)路,所以通常称为单闭环调速系统。当采用PI调节器控制时也可以在保证系统稳定的条件下实现转速无静差,即具有良好的静态性能。当对系统的动态性能要求较高(例如要求快速起制动等),单闭环系统就难以满足需要。这时,应用更普遍、更典型的是转速、电流双闭环调速系统。下面将介绍该系统的组成和工作原理。 相似文献
6.
带电压内环的直流调速系统与转速、电流双闭环直流调速系统相比,在电流环内多加入一个电压环,能及时调节电网电压波动所造成的的扰动.以小功率直流电机为对象,采用工程设计法,对电压调节器、电流调节器和转速调节器进行设计,并在Matlab的Simulink环境中对系统进行仿真与调试,最后得出满足系统相应性能指标的一组参数. 相似文献
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位置检测装置、机床进给传动链和最重要的进给驱动装置构成了数控机床进给伺服系统,而数控机床进给伺服系统的功能和任务则是达到各坐标轴的位置控制。速度环、位置环和电流环包含在系统中,任意一环不能正常工作都可能导致伺服系统无法正常运转。诊断伺服系统所出现的故障,一般会区分内因和外因两种。伺服系统启动的条件是否满足是指外因,举例便是供给伺服系统的控制信号是否出现,供给伺服系统的电源是否正常,内因指的是确认伺服驱动装置故障等情况。供电及驱动条件在正常的情况下,系统自身仍然不能驱动伺服电机,即是内因。本文利用实例,探讨和分析了伺服系统常见故障形式。 相似文献
9.
本文采用转速—电流双闭环对一台直流电机进行调速控制,通过工程设计方法,将电流环设计为典型一阶系统,将转速环设计成典型二阶系统。通过测试,可以达到良好的启动性能,实现设定目标D=5,无静态误差;S≤5%,δn%≤10%,δi%≤5%。 相似文献
10.
通过对模糊控制理论的研究和分析后,提出了一种基于人工神经元网络的液压伺服系统自动控制方案,详细阐述了该液压伺服系统中模糊控制的总体框架、基本原理和组成结构。对基于人工神经元网络的控制原理和模型结构进行了分析,结合实际的液压驱动领域中的伺服系统组成结构和功能进行了分析,给出了详细带自反馈的智能控制系统。分析过程中重点以液压伺服系统的工作特点、性能参数作为研究主要对象。所设计的液压伺服智能控制系统进行了实验分析和仿真,仿真结果表明,基于人工神经元网络的液压伺服系统具有控制精度高、收敛速度快等特点,在性能上完全达到预期设计要求。 相似文献
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通过对定轴轮系和行星轮系伺服稳定平台的运动分析,建立伺服稳定平台扰动运动模型和控制系统模型.得到了稳定平台对载体角扰动和力矩扰动隔离能力的公式,并得出结论:平台隔离能力低频下只和系统开环增益相关,高频下和驱动结构相关:增大电机驱动回路开环增益可以减小力矩扰动影响. 相似文献
12.
本文在介绍车载DVD伺服控制系统的构成和设计原理的基础上,针对车载DVD伺服系统要求高精度、抗震动、快速响应的特点,采用了高度集成的DVD驱动器专用伺服控制芯片M5705,对DVD聚焦伺服系统进行控制。利用改进的PID算法运用到车载DVD伺服控制嵌入式系统的设计中,并对此系统进行了仿真。 相似文献
13.
Ahmad Sakr Ahmad M. El-Nagar Mohammad El-Bardini Mohammed Sharaf 《Journal of The Franklin Institute》2018,355(15):7201-7225
This paper proposes a fuzzy model predictive control (FMPC) combined with the modified Smith predictor for networked control systems (NCSs). The network delays and data dropouts are problems, which greatly reduce the controller performance. For the proposed controller, the model of the controlled system is identified on-line using the Takagi – Sugeno (T-S) fuzzy models based on the Lyapunov function. There are two internal loops in the proposed structure. The first is the loop around the FMPC, which predicts the future outputs. The other is the loop around the plant to give the error between the system model and the actual plant. The proposed controller is designed for controlling a DC servo system through a wireless network to improve the system response. The practical results based on MATLAB/SIMULINK are established. The practical results are indicated that the proposed controller is able to respond the networked time delay and data dropouts compared to other controllers. 相似文献
14.
The backstepping technique is one of the tools which provides control Lyapunov functions (CLFs) and, therefore, control laws for automatic systems. In this paper, the backstepping design for position and force nonlinear electrohydraulic servos is investigated. Three control laws ensuring the asymptotic stability of references tracking are obtained by constructing CLFs on the errors concerning the state variables and theirs desired values. The possibility of converting a position servo into a force servo, with only minimal hard modification, is proved. An approach based on partitioning the state system into two subsystems—a first one stable, and a second one taken as framework of control synthesis by backstepping technique—was developed and used. Using as reference point a flight controls hydromechanical servo, numerical simulations were reported from viewpoint of servo time constant performance. Certain conjectures, concerning the behaviour of systems mathematical models, in connection with mathematical methodologies of control synthesis operating on them, are finally stressed. 相似文献
15.
Radu-Emil Precup Stefan Preitl József K. Tar Claudiu Pozna 《Journal of The Franklin Institute》2009,346(10):980-1003
This paper presents a new framework for the design of generic two-degree-of-freedom (2-DOF), linear and fuzzy, controllers dedicated to a class of integral processes specific to servo systems. The first part of the paper presents four 2-DOF linear PI controller structures that are designed using the Extended Symmetrical Optimum method to ensure the desired overshoot and settling time. The second part of the paper presents an original design method for 2-DOF Takagi-Sugeno PI-fuzzy controllers based on the stability analysis theorem. Experimental results for the speed control of a servo system with variable load illustrate the performance of the new generic control structures. 相似文献
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介绍了迭代学习控制原理和技术方法，根据伺服系统的特点，以电液位置伺服系统为例，针对以往PID控制的不足提出将迭代学习控制方法应用在伺服系统中，并用Matlab做出仿真进行效果分析。 相似文献
17.
本文分析了空调控制系统、变风量空调系统特点及目前存在的控制问题,提出了空调控制系统引入智能控制方案的可行性与必要性,针对变风量空调系统的特点和要求,提出变风量空调系统的控制方案。控制回路由冷水流量—送风温度控制、风机转速—静压点静压控制、送风量—室内温度控制、新风量—二氧化碳浓度控制四个控制回路组成,建立了一种新的多层神经网络,实现了神经网络和PID控制规律的本质结合,在变风量空调控制系统中表现出很强的学习和自适应解耦能力,MATLAB仿真试验说明了系统设计的有效性。 相似文献
18.
DSP-based synchronous control of dual linear motors via Sugeno type fuzzy neural network compensator
A digital signal processor (DSP)-based complementary sliding mode control (CSMC) with Sugeno type fuzzy neural network (SFNN) compensator is proposed in this study for the synchronous control of a dual linear motors servo system installed in a gantry position stage. The dual linear motors servo system comprises two parallel permanent magnet linear synchronous motors (PMLSMs). The dynamics of the single-axis motion system with a lumped uncertainty which contains parameter variations, external disturbances and nonlinear friction force is briefly introduced first. Then, a CSMC is designed to guarantee the precision position tracking requirement in single-axis control for the dual linear motors. Moreover, to enhance the robustness to uncertainties and to eliminate the synchronous error of dual linear motors, the CSMC with a SFNN compensator is proposed where the SFNN compensator is designed mainly to compensate the synchronous error. Furthermore, to increase the control performance of the proposed intelligent control approach, a 32-bit floating-point DSP, TMS320VC33, is adopted for the implementation of the proposed CSMC and SFNN. In addition, some experimental results are illustrated to show the validity of the proposed control approach. 相似文献
19.
为了进一步提高低速走丝线切割的表面质量,本文采用了气液混合多次切割的工艺。并采用正交设计法研究了脉冲宽度、脉冲间隔、峰值电流、伺服电压、伺服进给速度5个因素对表面粗糙度的影响,并通极差分析和利用二元表找出了在考虑上述5个因素交互作用下各因素的最佳水平,为进一步研究低速电火花线切割加工工艺提供了基础。 相似文献
20.
Majid Ghorbani Mahsan Tavakoli-Kakhki Ali Akbar Estarami 《Journal of The Franklin Institute》2019,356(16):9302-9329
This study investigates the robust stability of the retarded type of interval fractional order plants with an interval time delay. To this end, the characteristic quasi-polynomial is divided into two terms. The first term is simply the denominator interval polynomial of the open loop system and the second term is the multiplication of the interval delay term in the numerator of the open loop system which is an interval polynomial. Each of these two terms of the characteristic quasi-polynomial makes their own value sets in the complex plane for a given frequency. In this paper, based on these two value sets and by using the zero exclusion principle, the robust stability of the closed loop system by applying a FOPID controller is analyzed. Finally, two numerical examples and an experimental verification are provided to demonstrate the effectiveness of the proposed method in the robust stabilization of fractional order plants with interval uncertainties and interval time delay. 相似文献