Dealing with time-varying parameter problem of robot manipulators performing path tracking tasks

1992 ◽  
Vol 37 (10) ◽  
pp. 1597-1601 ◽  
Author(s):  
Y.D. Song ◽  
R.H. Middleton
Keyword(s):  
Robot Manipulators ◽  
Path Tracking ◽  
Time Varying ◽  
Tracking Tasks ◽  
Time Varying Parameter ◽  
Parameter Problem

scholarly journals Fuzzy Adaptive Switching Control for an Uncertain Robot Manipulators with Time-Varying Output Constraint

Complexity ◽  
2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Yongqing Fan ◽  
Wenqing Wang ◽  
Ying Liu ◽  
Minjuan Wang
Keyword(s):  
Fuzzy Logic ◽  
Adaptive Control ◽  
Robot Manipulators ◽  
Design Method ◽  
Fuzzy Logic System ◽  
Time Varying ◽  
Time Varying Parameter ◽  
Output Constraints ◽  
Fuzzy Adaptive ◽  
Logic System

An adaptive control strategy based on a fuzzy logic system by introducing a nonzero time-varying parameter is studied for an n-link manipulator system with the condition of a complex environment. At the beginning, a universal approximator with a one time-varying parameter is proposed based on the analysis of the fuzzy logic system, which is utilized to equalize uncertainties in robot manipulators with time-varying output constraints. The novel design method is used to reduce greatly the online learning computation burden compared with traditional fuzzy adaptive control. The output and the position of robotic manipulators are constrained with time-varying, a good tracking performance can be guaranteed with the condition of unknown dynamics of robot manipulators, and the violation of constraints can be conquered by the analysis based on the barrier Lyapunov function. A switching adaptive control is proposed to extend the semiglobal stability to global stability. Effectiveness of the approach is demonstrated by simulation results.

Capital mobility in Sweden: a time-varying parameter approach

2007 ◽  
Vol 14 (15) ◽  
pp. 1115-1118 ◽  
Author(s):  
Abdulnasser Hatemi-J ◽  
R. Scott Hacker
Keyword(s):  
Capital Mobility ◽  
Time Varying ◽  
Time Varying Parameter ◽  
Parameter Approach
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