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1.
考虑了一类永磁同步电动机的终端滑模控制器设计问题.在控制器设计中利用中继切换控制使系统在给定的当前控制律的作用下运行到某一特定状态（或某一特定区域）后,控制律被切换到有限时间收敛的终端滑模控制器,使得系统在有限时间内达到平衡状态.终端滑模控制器的设计保证了闭环系统所有信号的有界性和平衡点的全局稳定性,以及系统在有限时间内精确地跟踪给定的参考信号.最后,通过一个数值仿真验证了所提算法的正确有效性. 相似文献
2.
文中考虑了一类永磁同步电动机的终端滑模控制器设计问题.在控制器设计中利用中继切换控制使系统在给定的当前控制律的作用下运行到某一特定状态（或某一特定区域）后,控制律被切换到有限时间收敛的终端滑模控制器,使得系统在有限时间内达到平衡状态.终端滑模控制器的设计保证了闭环系统所有信号的有界性和平衡点的全局稳定性,以及系统在有限时间内精确地跟踪给定的参考信号.最后,通过一个数值仿真验证了所提算法的正确有效性. 相似文献
3.
马新 《临沂师范学院学报》2009,31(3):33-37,41
考虑了一类永磁同步电动机的有限时间跟踪控制问题．在控制器设计中利用中继切换控制使系统在给定的当前控制律的作用下运行到某一特定状态（或某一特定区域）后,控制律被切换到有限时间收敛的终端滑模控制器,使得系统在有限时间内达到平衡状态．有限时间跟踪控制器的设计保证了闭环系统所有信号的有界性和平衡点的全局稳定性,以及系统在有限时间内精确地跟踪给定的参考信号．最后通过一个数值仿真验证了所提算法的正确有效性． 相似文献
4.
马新 《赤峰学院学报(自然科学版)》2014,(4):45-47
本文结合终端滑模控制和模糊控制两种非线性控制方法,提出了一类永磁同步电动机的模糊滑模控制方法.为了实现永磁同步电动机伺服系统快速而准确的位置跟踪控制,在控制器设计中,利用中继切换控制使系统在给定的当前控制律的作用下运行到某一特定状态(或某一特定区域)后,再在滑模控制策略中引入模糊控制算法,进而设计了一种基于模糊滑模控制的非线性电机转速控制器.仿真结果显示,模糊滑模控制较好地解决了抖振问题,有效地实现了电机的转速跟踪,具有良好的动、静态特性和鲁棒性. 相似文献
5.
本文主要研究永磁同步电机伺服系统的位置跟踪问题。根据矢量控制原理,针对d轴电压,设计了一阶滑模控制器,将使d轴电流在有限时间到达0。针对q轴电压,基于滑模控制理论,设计了积分型高阶滑模控制器。由于系统中存在不确定性参数,设计了基于神经网络的q轴电压滑模控制器。理论分析表明,在所设计的控制器作用下,可以保证位置系统的精确跟踪控制。仿真结果表明了该控制方案具有较好的收敛性和抗干扰性能。 相似文献
6.
针对永磁同步电动机系统的参数处在某些范围内出现的混沌振荡现象,以单个永磁同步电动机系统为节点,建立多电机互联网络模型,研究复杂电机网络的混沌振荡同步控制。通过所设计的PD控制方法,使整个电动机网络在有限时间内达到目标平衡点,确保电机网络的稳定。理论分析和仿真结果表明,所设计的PD控制器能够有效地提高电机网络的稳定性和收敛时间,对保证电动机传动系统的协调同步运行具有一定的应用价值。 相似文献
7.
张桂林商丰盈刘浩天张婧 《实验室研究与探索》2023,(4):10-15
针对难以精确地用数学语言描述永磁同步电动机机理特性的问题,设计了基于VxWorks实时操作系统的硬件在环永磁同步电动机对拖实验平台。利用VxWorks实时操作系统实现控制系统控制信号及采集信号的实时性;使用频率变化的正弦信号激励出永磁同步电动机特定频率范围内的模态,采用功率谱密度函数模型辨识方法建立其数学模型,并将辨识出的数学模型用于系统速度环的控制器设计,并通过仿真及平台进行了实验。实验结果表明,辨识模型可以较精确地描述实验平台的快速性、相对稳定性等动态特性。该方案将重点放在模型建立和控制器设计上,门槛低,灵活性大,可大大缩减实验时间。 相似文献
8.
针对传统矢量控制中永磁同步电动机解耦不充分的问题，设计了基于反馈线性化的永磁同步电动机状态反馈控制器。该设计首先利用反馈线性化对内嵌式永磁同步电动机数学模型进行处理，并基于线性化模型，采用线性二次型调节器设计状态反馈控制器；随后采用灰狼优化算法对线性二次型调节器中的加权矩阵Q和R进行优化；最后利用Simulink软件对状态反馈控制器进行仿真，并通过2.2 kW永磁同步电动机实验平台对控制器中的控制算法进行实验验证。结果表明，该控制方法在永磁同步电动机的抗负载扰动和转速跟踪方面有着良好的控制效果，能够保证电动机在变载、变速和正反转情况下稳定运行。 相似文献
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10.
将计算机仿真技术应用于永磁同步电动机控制器的设计研究,根据永磁同步电动机的数学模型,结合直接转矩控制理论,以空调用永磁同步电动机为例,利用Matlab/Simulink软件,对永磁同步电动机直接转矩控制仿真建模,给出其仿真结果。 相似文献
11.
Recently the definition of motor development seems to have engendered a debate among a number of scholars in the field. We suggest that the controversy stems from confusion about whether motor development is a product or a process. When motor development is defined as change over time in motor behavior, the focus is on motor performance (i.e., product), whereas when motor development is defined as a process, the emphasis is on the underlying mechanisms of change. Clearly, the proper definition of motor development includes both the product and process of change. Through an historical overview of the field, we trace the origins of this definitional confusion and its impact on the study of motor development. The paper concludes with our position as to the future directions for motor development research. 相似文献
12.
Mary Ann Roberton 《Quest (Human Kinetics)》2013,65(3):213-223
In this paper I explore the common history of developmental psychology and motor development, concluding that the field of motor development should be defined in a manner analogous to the way its parent field, developmental psychology, is defined. Therefore, I view the study of motor development as the study of change in motor behavior across the lifespan. This was the implicit definition used by the first textbook in the field, Espenschade and Eckert's (1967) Motor Development. Two implications of this definition are (a) with change in motor behavior as the focus of study, age becomes a “marker variable” in developmental research, and (b) the lifespan perspective frees (and forces) motor development researchers to reexamine causation. These implications further suggest that the organismic paradigm is no longer sufficient for the field of motor development. I propose that general systems theory, exemplified in the study of motor development by dynamical systems theory, is a possible, new paradigm for lifespan motor development research. 相似文献
13.
The DSC （direct self control） of speed regulation technology was applied to drive a motor running at a certain overloading ratio in intermittent working conditions. To control motor temperatures rising effectively, a finite element method with an iterative approach was applied to simulate real working conditions and analyze the temperature rising of the inner part of the motor. Application of DSC speed regulation realizes the invariable torque output quickly and avoids the peak current at the start state in favor of the motor temperature decreasing. Based on an analysis with the finite limit method, some effective measures were taken to improve the ability of the motor to expel heat. The overload ability of the motor was improved and the stable motor temperature rising was obtained, fulfilling the demands of electrical screw presses. 相似文献
14.
Four questions are presented: What are the historical roots of motor development; How can motor development be characterized; How should motor development be conceptualized; and How should motor development be organized? A brief history presents the psychological roots of motor development and emphasizes the individual researchers who have created the area of motor development since the 1960s. Motor development is characterized as a composite of the researchers, knowledge, application of knowledge, systems for delivering knowledge, and graduate programs in motor development. Motor development should be a perspective rather than a structure or subdiscipline. All courses in human movement should be taught from a developmental perspective, research should be done within the appropriate subdiscipline, and some of that research should be developmental. Motor development will be best served if researchers align with scientists within the subdisciplines and share developmental information in cross-disciplinary groups. 相似文献
15.
介绍了纯电动汽车对驱动电机的要求,建立了纯电动汽车用驱动电机性能参数的数学模型,分析总结了其基本特性参数的初步确定原则;然后利用Advisor软件进行整车仿真模拟,验证方法的可行性,并为电机的快速选择和后续车辆动力传动系统匹配优化提供了依据。 相似文献
16.
Amicroactuator,whichisthecorepieceinmicro electro mechanicalsystem(MEMS) ,hasbeenattachedgreatimportanceandappliedwidelyinvariousfields .Becauseofitssuperperformances ,theultrasonicmotorhasbecomeoneofthemostprosperousmotionsources .Theultrasonicmotorisanewtypeofmicroactuatorwhichbreakstheconventionalcon ceptionofelectromagneticmotoranddependsuponthecon versepiezoelectriceffectofthepiezoelectricceramicandfric tionalcouplingofvibration . Makingacomprehensiveviewontheprogressofultra sonicmot… 相似文献
17.
直接启动电动机会产生很强的冲击电流,降低了电动机的使用寿命,对电网也会造成很大的冲击。设计一种限流PI调节降压式软启动,该软启动以TMS320F28335为控制核心,通过在同步信号作用下,采集电动机启动时电流、电压信号,对晶闸管触发角移相的控制实现电动机启动电压和电流的调节,电动机启动过程中的参数可以根据电动机不同负载特性来设置,启动过程设计了过压、过流检测电路和电动机保护回路,可以确保电动机安全平稳的启动。对该设计方案进行仿真和实验验证,仿真和实验表明在相同负载下,直接启动方式下电动机启动时会产生5~7倍额定电流强度的启动电流,而在软启动方式下减小到2倍左右,验证了本设计能显著地降低电机启动电流。 相似文献
18.
通过对多种车型的汽油车采取集中封闭运行、多台仪器同时监测的方法，测量出机动车分别在高怠速和低怠速下更换车用乙醇汽油前后尾气中一氧化碳、碳氢化合物、苯系物、醛类和酮类等浓度的变化及净化效率。总结得出车用乙醇汽油使用运行中特征污染物变化规律是一氧化碳、碳氢化合物、苯系物和酮类等排放浓度有所降低，但是醛类污染物排放浓度大幅度升高，有可能成为更换乙醇汽油后汽车尾气中的主要污染物之一。 相似文献
19.
Relevance,Application, and the Development of an Unlikely Theory 总被引：1，自引：1，他引：0
Shirl J. Hoffman 《Quest (Human Kinetics)》2013,65(2):143-160
This paper advances the argument that motor learning research is not relevant to the needs and interests of motor skill teachers. The principal reason is that motor learning researchers in university departments of physical education have responded to calls for paradigmatic shifts that were intended for experimental psychologists, not necessarily for researchers from departments of physical education. As a result, motor learning researchers have concentrated their efforts on studying the mechanisms underlying motor performance rather than on devising and testing ways to improve motor performance. The body of knowledge produced by this approach has been based on experiments employing laboratory tasks and treatment conditions that lack fidelity to those appropriate or even possible in real-world teaching environments. Consequently, little knowledge has been produced that can be directly applied to the technical aspects of teaching. It also is argued that progress toward an applied thrust has been hindered because energies of the most capable researchers have been spent on attempts to develop a grand theory of motor skills, a theory that can never emerge until researchers attend to the essential preliminary task of defining motor skills. 相似文献
20.
针对永磁同步电机对家用HEV的动力匹配、动力控制的工况匹配2个问题,建立合理的电机动力的数学模型.通过参数的取定和试验界定,计算分析了选用电机参数,实现了对车辆动力因素的匹配;同时分析了弱磁工况下实现电机动力控制匹配的相关问题. 相似文献