ฉัตรเกล้า เจริญผล. Motion analysis of a hyper-redundant robot for object manipulation. Doctoral Degree(Electrical and Computer Engineering). King Mongkut's University of Technology Thonburi. KMUTT Library. : King Mongkut's University of Technology Thonburi, 2010.
Motion analysis of a hyper-redundant robot for object manipulation
Abstract:
This thesis discusses a method for controlling a hyper-redundant robot to manipulate
an object on a plane. The performance of this method is demonstrated by a hyper-redundant
arm and hyper-redundant robot. The control method is divided into two
parts: encircling and moving part. The encircling part of the hyper-redundant robot
can perform simple whole-arm manipulation by coiling or wrapping around the object.
The encircling part is controlled by a set of virtual constraints that guide the encircling
part to reach around the object and encircle it, keeping the part within a specified bound
to ensure the circular shape around the object. In the process of transporting the object
in the hyper-redundant arm, a simplified desired shape is generated from Be'zier curve
according to a given goal position and the arm geometry. Then, the gradient descent
method is used to update the joint angles of the arm at each step to move the arm
toward the desired shape until the object reaches its target position. In the process of
avoiding obstacle in hyper-redundant mobile robot, a potential field method together
with the nearest optimal subgoal and the back-tracking algorithm guide the collide-free
path. The constraint of the robot is considered for each to fit with specified robot. The
proposed method has been tested in both simulation and actual experiments.