一种将改进连分式与Routh近似相结合的降阶法  

An order-reduced method of combining continued fraction with approximate Routh

作　　者：姚绪梁[1] 舒小芳[1] 杨祖泉[1] 

机构地区：[1]哈尔滨工程大学自动化学院,黑龙江哈尔滨150001

出　　处：《应用科技》2005年第2期47-49,共3页Applied Science and Technology

摘　　要：提出了一种将改进连分式法与Routh近似法相结合的降阶方法,像改进连分式法一样用原系统的分母构造一个新的闭环传递函数,再用Routh近似法将其降阶得到简化系统的分母,进一步用长除法得到简化系统的分母.仿真结果表明这种方法不仅能保证系统的稳定性,而且还能保证降阶系统的低频特性.An order_reduced method is presented for combining continued fraction with Approximate Routh.It constructs a new loop transfer funetion just like the contincced fraction method.Then it gets the denominator of the system simplified with the approximate Routh method and the numerator with long_division method. The simulation results indicate that it can guarantee the stability,simplify the calculation and keep the system in low frequency.

关 键 词：大系统 模型降阶 连分式法 Routh近似法 

分 类 号：TP13[自动化与计算机技术—控制理论与控制工程]