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Handdeut Chang

6 accepted papers

2022

Towards a Snake-Like Flexible Robot With Variable Stiffness Using an SMA Spring-Based Friction Change Mechanism

RA-L 2022

A flexible surgical robot that can adjust its stiffness guarantees safe operation by satisfying both the high flexibility required when the robot approaches a surgical target and the more stiffness necessary for the end effector to perform surgical procedures. Therefore, this paper proposes a flexib

Cited by 17SourceScholar
2021

Power Transmission Design of Fast and Energy-Efficient Stiffness Modulation for Human Power Assistance

ICRA 2021poster

Compliance in robot actuation provides a solution to perform safe physical human-robot interaction. Conventional compliant actuators (variable stiffness actuators, series elastic actuators) used more than two motors or closed-loop controller to modulate both stiffness and equilibrium position indepe…

Cited by 8SourceScholar
2018

Design of a Portable Pneumatic Power Source With High Output Pressure for Wearable Robotic Applications

RA-L 2018

Despite the rapid advances in soft robotic actuation technologies, the main energy source that powers most wearable systems remains the conventional tethered stationary air compressor that greatly limits these systems' applicability. Several portable pneumatic energy sources have been introduced; ho

Cited by 24SourceScholar
2017

Development and control of a variable stiffness actuator using a variable radius gear transmission mechanism

IROS 2017poster

The closer distance between robots and human partners in the same space makes compliant robots essential in these days. While torque sensor based impedance control scheme suffers from insufficient bandwidth, musculoskeletal systems can achieve similar ability with smaller resources by using mechanic…

Cited by 7SourceScholar
2017

Stochastic sEMG processor based manipulator control toward man-machine interface with minimal electro-mechanical delay

ICRA 2017poster

Inspired from Hogan's myoelectric processor in 1980, this study presents a stochastic sEMG processing method to estimate the muscle activation level for manipulator control. Hogan's previous study showed the feasibility to estimate the muscle activation level with multi-channel sEMG under static for…

Cited by 1SourceScholar
2016

Analytical investigation of the stabilizing function of the musculoskeletal system using Lyapunov stability criteria and its robotic applications

IROS 2016poster

The stabilization of man-made artificial systems has been achieved by sensor based state feedback control with high computational bandwidth and high stiffness structures. In contrast, many biological systems have been achieved similar or superior stable behavior with low speed signal transmission vi…

Cited by 5SourceScholar