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parameter self adjusting
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Fuzzy controllers as shown in practice have many advantages over conventionalDDC or PID controllers,but it is still limited for simple Fuzzy controller to furtherimprove its control quality with its quantization and proportion factors constant.Inthis paper a method of parameters self-adjusting is proposed to meet process reqirementfor parameters in different response time period,thus the controller becomes more intel-ligent and has an optimized response.And the advances of conventional...

Fuzzy controllers as shown in practice have many advantages over conventionalDDC or PID controllers,but it is still limited for simple Fuzzy controller to furtherimprove its control quality with its quantization and proportion factors constant.Inthis paper a method of parameters self-adjusting is proposed to meet process reqirementfor parameters in different response time period,thus the controller becomes more intel-ligent and has an optimized response.And the advances of conventional PID control-ler are combined into Fuzzy controller.Therefore we develope a new kind of control-ler,namely,parameters self-adjusting fuzzy-PI controller.Also results of simulationand application to temperature control of an oil-fueled annealing furnace are shown hereto demonstrate its fine characteristics.

实践证明,Fuzzy 控制器有一定优越性。但简单 Fuzzy 控制器的参数为一组常量,要提高其性能仍受到限制。本文提出了 Fuzzy 控制器参数自调整的方法,以满足过程响应在不同状态下对参数的不同要求,得到最佳的响应特性。机器模拟人的“粗调”与“细调”的操作方法,表现了较高的智能。作者考虑到常规 PI 调节器的优点,把 Fuzzy与 PI 控制相结合,构成了新型的参数自调整 Fuzzy-PI 调节器。文中给出了仿真实验结果以及在钢厂燃油退火炉温度控

Several cushioning and positioning methods of hydraulic cylinders used in robots have been investigated and compared, a new scheme for cushioning and positioning control system is presented. A proportional valve-cylinder system controlled by a self-organization fuzzy controller has been designed and completed. Practice has proved that the system has the advantage of low cost, high precision and contamination insensitivity. It also enables the piston to position at any point within the stroke.With self-organization...

Several cushioning and positioning methods of hydraulic cylinders used in robots have been investigated and compared, a new scheme for cushioning and positioning control system is presented. A proportional valve-cylinder system controlled by a self-organization fuzzy controller has been designed and completed. Practice has proved that the system has the advantage of low cost, high precision and contamination insensitivity. It also enables the piston to position at any point within the stroke.With self-organization fuzzy controller, the difficulties in modelling are avoided. A method of parameters self-adjusting is proposed to meet process requirement on different work condition, thus with the operation method which imitates the human "rough" and "fine" adjusting process, the controller becomes more intelligent and gets an optimized response. Experiments show that the adaptability of the self-organized fuzzy controller works very well in different work condition, and can realize variable cushioning strake. The positioning precision of the piston reaches to±0.02mm, and the peak pressure in cushioning process can be reduced to 44%.

用于液压机械手的油缸缓冲定位方法有多种,对它们各自的特点作了比较。提出一种新型的自组织模糊控制缓冲定位方案。设计、实现了用单板机控制的比例阀—油缸缓冲定位系统。该系统价格低、精度高、对油液污染不敏感,可实现活塞在油缸全行程内任意点的缓冲定位。使用自组织模糊控制器,避免了建立精确复杂数学模型的困难,并采用模糊控制器参数自调整的方法以满足过程响应在不同工作状态下对参数的不同要求,可得到最佳的响应特性。该控制器模拟了人的“粗调”和“细调”的操作方法,以压力冲击值的大小为判据,自动修正控制参数,表现了一定的智能。实验结果表明,自组织模糊控制器对不同的工况有较强的适应性,并实现了可变的缓冲行程。系统稳态误差不大于±0.02mm,定位时冲击压力可减少44%。

In conventional fuzzy control systems, there are some defaults or shortcomings, such as the static errors, the inefficient performance of tracing set point. In order to solving the problem, this paper presents a parameters self-adjusting Fuzzy+I controller. Its intelligent integerator eliminates the static error, parameters self -adjusting on-line of the fuzzy controller improves the dynamic character. Computer simulations show that the controller has better static characters,...

In conventional fuzzy control systems, there are some defaults or shortcomings, such as the static errors, the inefficient performance of tracing set point. In order to solving the problem, this paper presents a parameters self-adjusting Fuzzy+I controller. Its intelligent integerator eliminates the static error, parameters self -adjusting on-line of the fuzzy controller improves the dynamic character. Computer simulations show that the controller has better static characters, dynamic characters and strong robustness.

本文针对常规模糊控制系统存在稳态误差、对设定值的跟踪性能差等缺陷,提出一种参数自调整Fuzzy+I调节器,用智能积分器来消除稳态误差、在线自调整调节器参数以改善动态特性.计算机仿真表明这种调节器有良好的动态特性、静态特性与很强的鲁棒性.

 
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