As a typically complex mechanical system, robotic manipulator has the characteristics of complex structure, parameter uncertainty and vulnerability to external interference. From the perspective of second-order servo constraints, this paper proposes a robust constraint following control algorithm, which can meet the control requirements of robotic manipulator system under system uncertainty, which is described by fuzzy set theory. It also guarantees the deterministic performance of uniform boundedness (UB) and uniform ultimate boundedness (UUB). The system performance index function based on fuzzy information is established, and by minimizing the system performance index function, the optimization design problem of the controller gain parameter is solved. Numerical simulations and experimental results verify the efficacy of the robust controller and control parameter optimization method.
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http://dx.doi.org/10.1016/j.isatra.2024.12.041 | DOI Listing |
ISA Trans
January 2025
School of Civil Aviation, Northwestern Polytechnical University, Xi'an 710072, China. Electronic address:
World Neurosurg
January 2025
Bhabha Atomic Research Centre, Mumbai, India-400085.
This paper deals with neuro-registration using tele-manipulation (Master-Slave Manipulation) to facilitate tele-surgery and enhance the overall accuracy and reach of the robot-assisted neurosurgery. Accurate Neuro-registration is important as the success of the surgical procedure highly depends on it. A 6-degree-of-freedom Parallel Kinematic Mechanism (6D-PKM) master-slave robot in tele-manipulation mode is utilized for both neuro-registration and neurosurgery.
View Article and Find Full Text PDFBioinspir Biomim
January 2025
Southwest University of Science and Technology, No. 59, Middle Section of Qinglong Avenue, Fucheng District, Mianyang City, Sichuan Province, Mianyang, Sichuan, 621010, CHINA.
The Cable-Driven Hyper-redundant Manipulator (CDHM), distinguished by its high flexibility and adjustable stiffness, is extensively utilized in confined and obstacle-rich environments such as aerospace and nuclear facilities. This paper introduces a novel CDHM inspired by the trunk of elephants, which changes the arm structure from cylindrical to conical. This alteration diminishes the arm's self-weight, reduces the moment arm of gravity, decreases the volume of the end joint, narrows the stroke of the driving cables, and boosts the maximum joint speed of the manipulator.
View Article and Find Full Text PDFSoft Robot
January 2025
State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Hangzhou, China.
The high degree of freedom (DoF) shape morphing widely exists in biology for mimicry, camouflage, and locomotion. Currently, a lot of bionic soft/flexible actuators and robots with shape-morphing functions have been developed to realize conformity, grasp, and movement. Among these solutions, two-dimensional responsive materials and structures that can shape morph into different three-dimensional configurations are valuable for creating reversible high DoF shape morphing.
View Article and Find Full Text PDFMultimed Man Cardiothorac Surg
January 2025
New Cross Hospital, Royal Wolverhampton NHS Trust, Wolverhampton, United Kingdom.
Robotic-assisted thoracic surgery has become increasingly utilized in recent years. Complex lung cancer resection surgery can be performed using a robotic approach. It facilitates 3-dimentional visualization of structures, enhanced manipulation of tissues and precise movements.
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