Study on the Performance of a Second Order Nonlinear Tracking Differentiator

摘要：

A Second-order nonlinear tracking -differentiator (SONTD) constructed by a symbol function sign and a linear saturation function sat has good tracking and differential performances for smooth continuous input functions,but it isn!t appropriate for the step type of input functions,In order to overcome the defects of the SONTD constructed by sign and sat,a new nonlinear saturation function composed of a sinusoidal function and a sign function is introduced,and a new type of second-order nonlinear TD is constructed based on the nonlinear saturation function.Simulation results show that the new type of SONTD has good tracking and differential performances for the step type of input functions,but it isn!t appropriate for smooth continuous input functions.The control system with the new type of SONTD can have a preferable transient process when the input is a step type of input function.

关键词： tracking-differentiator transient process nonlinear function accelerating factor jitter.

作者: Wang Jiuhe Zhou Yali Xia Peirong

作者单位: School of Automation,Beijing Information Science & Technology University,Beijing,china

会议类型: 国际会议

会议名称: International Conference on Modelling,Identification and Control(模拟、鉴定、控制国际会议)

会议地点: 上海

会议语种:英文

在线出版日期: 2008-06-29（万方平台首次上网日期，不代表论文的发表时间）