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Acquisition of new sensorimotor knowledge by imitation is a promising paradigm for robot learning. To be effective, action learning should not be limited to direct replication of movements obtained during training but must also enable the generation of actions in situations a robot has never encountered before. This paper describes a methodology that(More)
The paper presents a two-layered system for (1) learning and encoding a periodic signal without any knowledge on its frequency and waveform, and (2) modulating the learned periodic trajectory in response to external events. The system is used to learn periodic tasks on a humanoid HOAP-2 robot. The first layer of the system is a dynamical system responsible(More)
In this article we describe the use of a standard game console joystick, namely the Nintendo Wiimote, for controlling a HOAP-2 humanoid robot. We give a short overview on the use of tangible user interfaces, followed by the description of the used game controller and the measurements of some of its characteristics. We show the ease of applicability of(More)
A number of studies discuss the design and control of various exoskeleton mechanisms, yet relatively few address the effect on the energy expenditure of the user. In this paper, we discuss the effect of a performance augmenting exoskeleton on the metabolic cost of an able-bodied user/pilot during periodic squatting. We investigated whether an exoskeleton(More)
The creation and adaptation of motor behaviors is an important capability for autonomous robots. In this paper we propose an approach for altering existing robot behaviors online, where a human coach interactively changes the robot motion to achieve the desired outcome. Using hand gestures, the human coach can specify the desired modifications to the(More)
In this paper we describe the use of a standard game console joystick, namely the Nintendo WIIMOTE, for an active real-time 3D marker tracking. We show the ease of applicability of inexpensive and robust standard game controllers for 3D object tracking, e.g. to track an infrared source in 3D space. Recovering the 3D information using stereo vision is still(More)
The framework of dynamic movement primitives (DMPs) contains many favorable properties for the execution of robotic trajectories, such as indirect dependence on time, response to perturbations, and the ability to easily modulate the given trajectories, but the framework in its original form remains constrained to the kinematic aspect of the movement. In(More)