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Series elastic actuation (SEA) has been widely used for output force/torque regulation, however, the nonlinearity introduced by its torsion spring hysteresis will greatly affect the quality of feedback control. Thus an experimental procedure is conducted for the modeling and identification of spring hysteresis effect, based on which a compensated control scheme is given. Experiment results show that...
Impedance control has been widely developed in the robotic exoskeleton field for human performance assistance and enhancement. However, the determination of desired impedance parameters that dominates the characteristics of interaction force and motion control is not straightforward since these parameters depend not only on the physical properties of the wearer but also on the speed region during...
In this paper, we propose and analyze a Regenerative Magnetorheological Actuator (RMRA) for gait assistance in knee joint. The actuator has motor and magnetorheological (MR) brake parts working in parallel, and can harvest energy through regenerative braking. This novel design provides multiple functions with good energy efficiency. The design of the RMRA is first introduced, and its multiple functions...
This paper presents synthetic checking controller for robot manipulator with flexible joints, dynamics of executive motors and affect of disturbance based on radial basic function (RBF) neural network. A control algorithm is synthesized basing on the combination of backsteppping and RBF neural network in order to approximate the unknown functions. Finally, simulation results of a manipulator robot...
Many works have been done for controlling nonlinear systems using bio-inspired methods. In this paper, we propose an optimal intelligent controller for an Unmanned Aerial Vehicle (UAV). The controller consists on a type-2 fuzzy system with defuzzifier step was determined through Ant Colony Optimization algorithm (ACO). It is known that, ACO and Particle Swarm Optimization (PSO) algorithm are the most...
This paper studies dynamic behavior of a quadrotor in both simulation and experiment when tracking desired attitude angles. The flight attitude control implemented in this research is designed based on a feedback control with an inner-loop structure as in the Aeroquad project. The feedback control configuration is applied to the dynamic model of a DIY qaudrotor UAV to simulate its attitude tracking...
This paper describes design, simulation, and experiments of a mesoscale quadruped robot that can locomote by crawling and jumping. The robot has the length of 14 cm and the weight of 188 g. The robot is designed to perform crawling and jumping for the hybrid locomotion. The robot uses eight micro servo motors for crawling and four DC motors for jumping. The design has been validated by simulation...
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