A computationally efficient algorithm to find time-optimal trajectory of redundantly actuated robots moving on a specified path. Issue 1 (29th August 2018)

• Record Type: Journal Article
• Authors: Mansouri, Saeed; Sadigh, Mohammad Jafar; Fazeli, Masoud
• Is Part Of: Robotica. Volume 37:Issue 1(2019)
• Page Start: 62
• Page End: 79
• Publication Date: 2018-08-29
• Subjects: Time-optimal, -- Redundantly actuated robots, -- Robot control; Robots -- Periodicals; 629.89205
• DOI: 10.1017/S0263574718000863
• Languages: English
• ISSNs: 0263-5747

Abstract

SUMMARY: A time-optimal problem for redundantly actuated robots moving on a specified path is a challenging problem. Although the problem is well explored and there are proposed solutions based on phase plane analysis, there are still several unresolved issues regarding calculation of solution curves. In this paper, we explore the characteristics of the maximum velocity curve and propose an efficient algorithm to establish the solution curve. Then we propose a straightforward method to calculate the maximum or minimum possible acceleration on the path based on the pattern of saturated actuators, which substantially reduces the computational cost. Two numerical examples are provided to illustrate the issues and the solutions.