Collision Avoidance Control Using Null Space Criteria
Journal Title: RECENT - Year 2012, Vol 13, Issue 34
Abstract
A new strategy to on-line collision-avoidance of the redundant robots with obstacles is presented. The strategy allows the use of redundant degrees of freedom such that a manipulator can avoid obstacles while tracking the desired end-effectors trajectory. The effectiveness of the proposed strategy based on null space criteria is discussed by theoretical considerations. The strategy is based on the redundant inverse kinematics and leads to a favourable ability of redundant robots to avoid the collisions with obstacles. This strategy has the advantage that the configuration of the manipulator can be influenced by further requirements such as joint limits and so the self-collision is avoided.
Authors and Affiliations
Mariana FRATU, Aurel FRATU
Laser Welding of Austenitic Stainless Steel Thin Sheets
This paper presents investigations regarding the laser welding of austenitic stainless steel. Several laser welding tests were made using AISI 304 stainless steel in a butt joint configurations. An 3.3 kW Rofin laser and...
Procedures and Documents from the Laboratory for Testing of Products to Obtain the Certificate of Participation of the Single European Market
Standardization is a prerequisite for creating an optimal order in the economy and social life of each country. It is an integral part of science, as any science to manufacture certain products is based on standardized t...
Influence of Geometry of Hollow Rollers on the Contact Stress to the Large Bearings
The research answers to problems appeared in exploitation of large bearings, namely, uneven wear on the rollers and the raceways, as a result of high centrifugal forces. Currently, this problem is solved by execution of...
Solar Radiation Estimation under Clear Sky Conditions for Brasov Area (Romania) - Models Performance Estimation
The literature in this field offers a high number of models for estimating total solar radiation, because the world's most weather stations measure total solar radiation. However, it must be mention, diffuse radiation es...
Modelling and Simulation of Pressure Limiting Valve Based on Input and Output Data
The article presents an original mathematic model of a direct drive pressure limiting valve, establishing the status of each variable as input or output data, respectively, underling the two stages of the valve: before a...