共查询到19条相似文献,搜索用时 140 毫秒
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通过对感应电动机动态电磁关系的分析,引出了感应电动机的数学模型和在M-T坐标系上的数学模型表达式,指出了感应电动机的模型是一多变量、强耦合的非线性系统。将模糊控制技术应用于感应电机的变频调速中,设计了一种转速模糊控制器,并用MATLAB/Simulink对基于模糊控制的感应电机矢量控制系统进行了仿真。仿真结果表明:对于感应电机来说,模糊控制器的控制性能优于常规的PID控制器。 相似文献
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针对沥青路面修复机控制系统,应用模糊控制理论与传统PID控制的原理,设计了一种基于单片机的模糊自适应PID温度控制器.根据沥青路面修复要求实现的功能建立了温度控制系统的近似数学模型,对系统先后进行各种控制仿真,通过仿真发现,系统中模糊整定PID控制算法的动态性能比PI,PID和可积分分离的PID控制的性能要好,且具有较强的抗干扰能力,为复杂系统建模提供了一个有效途径. 相似文献
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将模糊控制理论与经典的PID控制理论结合,以锅炉温度控制系统为例,设计了一种模糊PID参数自整定控制器.仿真结果表明,和常规PID控制器相比,所设计的模期PID控制器改善了温度控制系统的动态性能,提高了系统的鲁棒性. 相似文献
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基于模糊PID的电液位置伺服控制器的设计 总被引:1,自引:0,他引:1
该文介绍了电液位置伺服控制系统的组成与工作原理,建立了系统的数学模型。将模糊控制与PID控制结合在一起,设计了模糊PID控制器,通过模糊控制器输出对PID参数进行在线调整。利用MATLAB软件进行仿真,比较常规PID控制与模糊PID控制仿真结果,发现模糊PID控制器提高了系统的动态性能和稳态特性。 相似文献
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Dr Shiuh-Jer Huang Chih-Feng Hu 《The International Journal of Advanced Manufacturing Technology》1996,12(6):450-454
Since a robotic manipulator has a complicated mathematical model, it is difficult to design a control system based on the complicated multi-variable nonlinear coupling dynamic model. Intelligent controllers using fuzzy and neural network approaches do not need a real mathematical model to design the control structure and have attracted the attention of robotic control researchers recently. A traditional fuzzy logic controller does not have learning capability and it needs a lot of effort to search for the optimal control rules and the shapes of membership functions. Owing to the time-varying behaviour of the system, the required fine tracking accuracy is difficult to achieve by adjusting the fuzzy rules only. The implementation problems of neural network control are the initial training and initial transient stability. In order to improve the position control accuracy and system robustness for industrial applications, a neural controller is first trained off-line by using the input and output (I/O) data of a traditional fuzzy controller. Then the neural controller is implemented on a five-degrees-of-freedom robot with a back propagation algorithm for online adjustment. The experimental results show that this neural network controller achieved the required trajectory tracking accuracy after 15 on-line operations. 相似文献
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针对基于传统的PID算法的煤粉流量控制系统所凸显的控制精度不高、控制滞后等问题,引入Fuzzy算法设计了Fuzzy-PID复合结构控制器,并介绍了硬件结构和软件设计.试验结果表明,此控制系统的控制效果明显优于传统PID,并具有很强的实用性. 相似文献
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模糊自适应PID在高空模拟舱中压力控制的应用研究 总被引:1,自引:0,他引:1
针对高空环境模拟舱压力控制系统变参数、强干扰、大惯性、强耦合等特点,将模糊控制与自适应PID控制结合起来,设计了模糊自适应PID控制器。利用模糊推理方法实现对PID参数的在线自整定,进一步完善PID控制器的性能,提高系统的控制精度。仿真结果表明该方法的控制效果优于常规的PID控制,并消除了模糊控制稳态误差较大的缺点,具有响应时间短、控制精度高、稳定性好等优点,有较好的工程应用前景。 相似文献
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针对恒压供水系统普遍存在的惯性大、非线性、随机性及纯滞后性的特点,设计了一种基于模糊 -PID控制策略的变频恒压供水系统。硬件部分介绍了系统的结构及组成,软件设计部分首先构建系统数学模型,研究了PID控制与模糊控制理论,并最终将模糊 -PID控制策略用于对系统的控制,同时兼具传统PID控制精度高及模糊控制动态响应特性好的优点。最后用MATLAB进行仿真的结果表明:模糊 -PID控制器能够使系统的动态、稳态性能优化,具有一定的应用前景。 相似文献
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Ruey-Jing Lian Bai-Fu Lin 《The International Journal of Advanced Manufacturing Technology》2006,29(9-10):1074-1087
The precise motion control of robotic manipulators is important in improving productivity and quality. However, robotic manipulators are multivariable nonlinear dynamic systems. Designing a model-based controller for robotic system control is difficult because its mathematical model is hard to accurately establish. This study proposed a self-organizing fuzzy controller (SOFC) to control a robotic system and evaluate its control performance. The SOFC continually updates the learning strategy in the form of fuzzy rules during the control process. The learning rate and the weighting distribution value of the controller are hard to regulate, so its fuzzy control rules may be modified to such an extent that the system response generally causes oscillatory phenomena. Two fuzzy logic controllers were designed according to the system output error and the error change, and introduced to the SOFC to determine the appropriate parameters of the learning rate and the weighting distribution, in order to eliminate this oscillation. This new modifying self-organizing fuzzy controller (NMSOFC) can effectively improve the control performance of the system, reduce the time consumed to establish a suitable fuzzy rule table, and support practical and convenient fuzzy controller applications. To confirm the applicability of the proposed intelligent controllers, this work retrofitted an old robot for a control system to evaluate the feasibility of motion control. Experiment results indicate the NMSOFC has better control performance in reducing the tracking errors of the joint-space trajectories and the positions, and requires less computational time than does the traditional fuzzy controller. 相似文献
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介绍了单定子三自由度超声电机实现 3个自由度运动的原理 ,根据控制目标设计并实现了该超声电机的运动信号的检测结构 ,利用逐点比较法分解控制指令并采用模糊控制方法对电机进行了位置控制 ,取得了较好的结果 ,实验结果表明电机的输出轴在一定范围内能够精确地按照预定轨迹达到空间的任一位置 相似文献
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首先建立了浆液下搅拌机器人车体的运动学模型,然后分析了传统的控制方法无法对其进行精确路径跟踪的原因,设计了用于机器人路径跟踪的模糊控制器,最后经过被控对象的分析与实验,验证了模糊控制器具有使用方便、精度高和稳定性好等优点。 相似文献