Abstract Variable Stiffness Actuator (VSA) is the core mechanism to achieve physical human–robot interaction, which an inevitable development trend in robotic. The existing variable stiffness actuators are basically single degree-of-freedom (DOF) rotating joints, achieving multi-DOF motion by cascades and resulting complex robot body structures. In this paper, integrated 2-DOF actuator with pro...

Mobile robots are generally required to pass through non-flat terrains which may contain holes and obstacles. Robots which are adequate for performing this task are limbed robots. The goal of this research is to navigate a multi-limbed robot under gravitational field effects. The navigation of the robot is achieved by quasistatic gaiting. In quasistatic motion, inertial effects due to moving pa...

A family of reconfigurable parallel robots can change motion modes by passing through constraint singularities by locking and releasing some passive joints of the robot. This paper is about the kinematics, the workspace and singularity analysis of a 3-PRPiR parallel robot involving lockable Pi and R (revolute) joints. Here a Pi joint may act as a 1-DOF planar parallelogram if its lockable P (pr...

The bionic joints composed of pneumatic muscles (PMs) can simulate the motion biological joints. However, PMs themselves have non-linear characteristics such as hysteresis and creep, which make it difficult to achieve high-precision trajectory tracking control PM-driven robots. In order effectively suppress adverse effects non-linearity on performance improve dynamic legged robot, this study de...

The need for robotic assistance has been identified to be essential in space exploration missions. This work is targeted for a centauroid robot, called WorkPartner, which is currently being developed to work interactively with astronauts. This paper describes SimPartner, a dynamic robot simulator of the WorkPartner robot by using ODE (Open Dynamics Engine) software. The software incorporates an...

This paper reports design, fabrication, and gait planning based on high walk diagonal trot gait pattern of an alligatorinspired robot having eight degrees of freedom. Each leg of the robot described in this paper has two revolute joints representing the hip and knee respectively which are actuated by servo motors. The body of the robot was fabricated on a CO2 laser cutting machine. The 3D leg d...

For uncalibrated visual servoing for image-based dynamic control of robot manipulators, acquiring an image Jacobian matrix (interaction matrix) or its inverse matrix is necessary and difficult. In this paper, a new controller of uncalibrated visual sevro using pseudo inverse of image Jacobian matrix is presented, which based on dynamics of robot manipulators. In this method, camera’s intrinsic ...

This contribution presents the experimental verijcation of the newly developed Hamilton-based dynamic model ofDELTA direct drive parallel robot by measurements of DELTA robot's motor torques. The strain gage technology was applied. The experiment is in author's opinion the Jirst ever for robot DELTA. The experimental results validate the modelling of robot DELTA as a Aystem of rigid bodies, con...

We design two performance measures for a planar locomotion robot, modeled closely after the Platonic Beast. The first measure is proportional to the total motion of all joints during locomotion of the robot. This is a rough approximation to the energy consumption of the robot. The second measure determines the maximal speed of locomotion, for given limits on the joint speeds. We compute optimal...

In this research paper, the multilayer feedforward neural network (MLFFNN) is architected and described for solving forward inverse kinematics of 3-DOF articulated robot. When designing MLFFNN kinematics, joints' variables are used as inputs to network, positions orientations robot end-effector outputs. case designed using only inputs, whereas joints’ For both cases, training proposed accomplis...