P0926MX FOXBORO 光焊合成器 全新

　　用于稳定性分析［37］。每一个矩阵p仅对应一个子系统，并表明当且仅当一组合适的riccati等式有正定对称解，且能得到这些解时，模糊控制系统才是全局稳定的。

　　使用李亚普诺夫线性化方法，ying建立了包括非线性对象的ts模糊控制系统局部稳定性的必要和充分条件［23］。另外，一种在大系统中使用的向量李亚普诺夫直接方法，被用于推导多变量模糊系统的稳定性条件［48］；李亚普诺夫第二方法被用于判别模糊系统量化因子选择的稳定性［49］；波波夫-李亚普诺夫方法被用于研究模糊控制系统的鲁棒稳定性［50］。

　　但是，李亚普诺夫的一些稳定性条件通常比较保守，即当稳定性条件不满足时，控制系统仍是稳定的。

　　4.2 基于滑模变结构系统的方法

　　由于模糊控制器是采用语义表达，系统设计中不易保证模糊控制系统的稳定性和鲁棒性。而滑模控制有一个明显的特点，即能处理控制系统的非线性，而且是鲁棒控制。因此一些学者提出设计带有模糊滑模表面的模糊控制器，从而能用李亚普诺夫理论来获得闭环控制系统稳定性的证明［25，27，51－54］。palm和driankov采用滑模控制的概念分析了增益规划的闭环模糊控制系统的稳定性和鲁棒性［55］。另有一些学者用模糊推理来处理控制系统的非线性和减少控制震颤，使得基于李亚普诺夫方法可保证控制系统的稳定性

　　control, all in a single compact device, will deliver a broad range of operational and financial benefits to oems, system integrators and factory floor personnel.” industry is moving rapidly to decentralized control because of its obvious advantages in reducing design engineering time and component costs, as well as in improving machine response time. it eliminates the laborious and costly process of engineering control machine-by-machine and drive-by-drive. decentralized control can also reduce installation and maintenance costs.as a distributed controller, movi-plc delivers increased security to oems and system integrators. a centralized control system typically provides a single point from which one person can gain access to the entire control algorithm – an effective “open door” to an oem’s intellectual property. movi-plc reduces this risk, allowing an oem not only to program and test the entire machine module before it is shipped as part of a larger skid-mounted package, but to lock down intellectual property – a major deter