It is well known that the massage therapy is useful for the rehabilitation of various diseases;i.e. oral health problems, etc. Authors have proposed the development of a novel rehabilitation robot designed to provide ...
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ISBN:
(纸本)9781424428823
It is well known that the massage therapy is useful for the rehabilitation of various diseases;i.e. oral health problems, etc. Authors have proposed the development of a novel rehabilitation robot designed to provide massage to maxillofacial region (as a therapy to patients with dry mouth, etc.). In this year, we have succeeded in developing the Waseda-Asahi Oral-Rehabilitation robot No.1 (WAO-1). WAO-1 is composed by two 6-DOF arms with plungers attached at their end-effector. A virtual compliance control has been implemented to control the positioning and the applied force by the plunger during the massage. Preliminary experiments were carried out to confirm the effectiveness of the proposed system. From the experimental results, we could detect the effectiveness of stimulating the production of saliva, and increasing the skin temperature as well as the size of masseter muscle on volunteers after providing the massage with WAO-1.
This paper presents an intelligent control architecture for robot-assisted rehabilitation after stroke that has the potential to minimize the workload of the therapist and incorporate patient feedback into autonomous ...
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ISBN:
(纸本)9781424428823
This paper presents an intelligent control architecture for robot-assisted rehabilitation after stroke that has the potential to minimize the workload of the therapist and incorporate patient feedback into autonomous modification of the task presentation during therapy. In particular, the presented intelligent controller will be able to administer a therapy task, monitor safety issues, provide assessment of the progress, and incorporate patient's feedback in order to make the necessary modifications of the task to impart effective therapy in an automated manner. Hybrid system modeling technique is used to design the intelligent control architecture. Experimental results with an unimpaired subject are presented to demonstrate the efficacy of the proposed control architecture.
With computer speeds greatly increasing, hardware is no longer a hurdle in the development of controllers for wearable lower limb robots. The challenge remains in developing smart algorithms that are able to detect wh...
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ISBN:
(纸本)9781424428823
With computer speeds greatly increasing, hardware is no longer a hurdle in the development of controllers for wearable lower limb robots. The challenge remains in developing smart algorithms that are able to detect which task a person is about to perform and then supply the robot with the correct desired movements. This paper reflects on some existing control algorithms and then presents theory and test results of two novel concepts. The goal of this paper is to show that the two new concepts are capable of producing the correct motor profile.
The paper considers a novel modular and intrinsically safe redundant robotic system with biologically inspired actuators (pneumatic artificial muscles and rubber bellows actuators). Similarly to the biological systems...
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ISBN:
(纸本)9781424428823
The paper considers a novel modular and intrinsically safe redundant robotic system with biologically inspired actuators (pneumatic artificial muscles and rubber bellows actuators). Similarly to the biological systems, the internal module (i.e. robot joint) stiffness is controlled by co-activation of opposing redundant actuator groups in the null-space of the module Jacobian, without influencing the actual robot position. The decoupled position/stiffness control allows the realization of variable joint stiffness according to different force-displacement relationships. The initial experiments with the system prototype demonstrate the capabilities of independently, simultaneously controlling both joint (Cartesian) motion and joint stiffness. The paper also presents the possible industrial applications of snake-like robots built using the new modules.
Cognitive processes, such as motor intention, attention, and higher level motivational states are important factors that govern motor performance and learning. Current robot-assisted rehabilitative programs focus only...
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ISBN:
(纸本)9781424428823
Cognitive processes, such as motor intention, attention, and higher level motivational states are important factors that govern motor performance and learning. Current robot-assisted rehabilitative programs focus only on the physical aspects of training. In this paper, we propose a framework for motor rehabilitation based on the augmentation of cognitive channels of patient-robot interactions and using it to deliver a more optimal therapy. By examining the cognitive processes involved in motor control and adaptation, it is argued that optimal therapy needs to be considered in the context of a complete motor scheme consisting not only of sensorimotor signals, but also their interactions with cognitive operations, such as motor planning, attention, and motivation, which mediate motor learning. We outline a few BCI-based modules for the detection and monitoring of relevant cognitive processes, which provide inputs for the robot to automatically modulate parameters of the rehabilitation protocol. Preliminary investigations on a BCI module for detection of motor intention, performed on a small group of stroke patients, show feasible accuracies.
controlling a riderless bicycle is a challenging problem because the dynamics are nonlinear. In this paper, an innovative robust control strategy based on 2(nd) order sliding mode control (SMC) is proposed for the sta...
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ISBN:
(纸本)9781424420575
controlling a riderless bicycle is a challenging problem because the dynamics are nonlinear. In this paper, an innovative robust control strategy based on 2(nd) order sliding mode control (SMC) is proposed for the stabilization of an autonomous bicycle. In order to improve overall performance, application of a disturbance observer (DOB) is suggested. The combination of 2nd order SMC and DOB enables to increase the robustness of the system trajectories while avoiding the chattering phenomenon. The proposed control scheme is validated by simulation and experimental results for bicycle stabilization at low and zero velocities.
In this paper, an EMG-based fuzzy-neuro control method is proposed for a three degree of freedom (3 DOF) human forearm and wrist motion assist exoskeleton robot (W-EXOS). The W-EXOS assists human forearm pronation/sup...
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ISBN:
(纸本)9781424428823
In this paper, an EMG-based fuzzy-neuro control method is proposed for a three degree of freedom (3 DOF) human forearm and wrist motion assist exoskeleton robot (W-EXOS). The W-EXOS assists human forearm pronation/supination motion, wrist flexion/extension motion and ulnar/radial deviation. The paper presents the EMG-based fuzzy-neuro control method with multiple fuzzy-neuro controllers and the adaptation method of controllers. The skin surface electromyography (EMG) signals of muscles in forearm of the exoskeleton users' and the hand force/forearm torque are used as input information for the controllers. Fuzzy-neuro control method, which is a combination of flexible fuzzy control and adaptive neural network control, has been applied to realize the natural and flexible motion assist. In the control method, multiple fuzzy-neuro controllers are applied, since the muscles activation levels change in accordance with the angles of motions. The control method is able to adapt according the changing EMG signal levels of different users. Experiments have been performed to evaluate the proposed EMG-based fuzzy-neuro, control method.
Intensive task-oriented repetitive physical therapies provided by individualized interaction between the patient and a rehabilitation specialist can improve hand motor performance in patients survived from stroke and ...
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ISBN:
(纸本)9781424428823
Intensive task-oriented repetitive physical therapies provided by individualized interaction between the patient and a rehabilitation specialist can improve hand motor performance in patients survived from stroke and traumatic brain injury. However, the therapy process is long and expensive and difficult to evaluate quantitatively and objectively. The goal of this research is to develop a novel wearable device for robotic assisted hand repetitive therapy. We designed a pneumatic muscle (PM) driven therapeutic device that is wearable and provides assistive forces required for grasping and release movements. The robot has two distinct degrees of freedom at the thumb and the ringers. The embedded sensors feedback position and force information for robotcontrol and quantitative evaluation of task performance. It has the potential of providing supplemental at-home therapy in addition to in the clinic treatment.
Certain sub-tasks involved in robot-assisted surgery can be described in terms of steady-state forces or positions that must be maintained during the procedure by the end effector(s). The automatic control system must...
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ISBN:
(纸本)9781424428823
Certain sub-tasks involved in robot-assisted surgery can be described in terms of steady-state forces or positions that must be maintained during the procedure by the end effector(s). The automatic control system must determine these levels. Methods for mathematically determining these equilibrium forces and positions are developed here. The computation is done in a way that enforces surgeon-provided safety and effectiveness limits, and accounts for the nonlinear properties of soft tissue, as well as actuator and sensor noise and model uncertainties. The problem is formulated as an optimization problem. The case of an exponential-like nonlinear tool-tissue interaction model, based upon prior experimental results, is considered for the example task of endoscopic retraction.
This paper explores the use of repetitive peripheral magnetic stimulation (RPMS) techniques in order to feedback forces in telerobotics systems. These techniques would be applied in teleoperation systems where a non-m...
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ISBN:
(纸本)9781424428823
This paper explores the use of repetitive peripheral magnetic stimulation (RPMS) techniques in order to feedback forces in telerobotics systems. These techniques would be applied in teleoperation systems where a non-mechanical interface, e.g. a gesture interface, is used by the operator to control the remote slave. The paper proposes to stimulate the flexor control nerves of the operator fingers by magnetic fields in order to provide force feedback to the operator. The first experimental results obtained with this new technique are analyzed and discussed in the paper.
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