Visual feedback control of quadrotor by object detection in movies

2020 ◽  
Vol 25 (3) ◽  
pp. 488-494
Author(s):  
Lu Shao ◽  
Fusaomi Nagata ◽  
Hiroaki Ochi ◽  
Akimasa Otsuka ◽  
Takeshi Ikeda ◽  
...  
Keyword(s):  
Feedback Control ◽  
Object Detection ◽  
Visual Feedback ◽  
Visual Feedback Control

Image-based dynamic visual feedback control via passivity approach

2006 ◽  
Author(s):  
Hiroyuki Kawai ◽  
Toshiyuki Murao ◽  
Masayuki Fujita
Keyword(s):  
Feedback Control ◽  
Visual Feedback ◽  
Visual Feedback Control

scholarly journals Visual Feedback Control of a Rat Ankle Angle Using a Wirelessly Powered Two-Channel Neurostimulator

Sensors ◽  
2020 ◽  
Vol 20 (8) ◽  
pp. 2210
Author(s):  
Masaru Takeuchi ◽  
Keita Watanabe ◽  
Kanta Ishihara ◽  
Taichi Miyamoto ◽  
Katsuhiro Tokutake ◽  
...  
Keyword(s):  
Feedback Control ◽  
Ankle Joint ◽  
Visual Feedback ◽  
Peripheral Nerves ◽  
Control Method ◽  
Plantar Flexion ◽  
Receiver Coil ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Visual Feedback Control

Peripheral nerve disconnections cause severe muscle atrophy and consequently, paralysis of limbs. Reinnervation of denervated muscle by transplanting motor neurons and applying Functional Electrical Stimulation (FES) onto peripheral nerves is an important procedure for preventing irreversible degeneration of muscle tissues. After the reinnervation of denervated muscles, multiple peripheral nerves should be stimulated independently to control joint motion and reconstruct functional movements of limbs by the FES. In this study, a wirelessly powered two-channel neurostimulator was developed with the purpose of applying selective FES to two peripheral nerves—the peroneal nerve and the tibial nerve in a rat. The neurostimulator was designed in such a way that power could be supplied wirelessly, from a transmitter coil to a receiver coil. The receiver coil was connected, in turn, to the peroneal and tibial nerves in the rat. The receiver circuit had a low pass filter to allow detection of the frequency of the transmitter signal. The stimulation of the nerves was switched according to the frequency of the transmitter signal. Dorsal/plantar flexion of the rat ankle joint was selectively induced by the developed neurostimulator. The rat ankle joint angle was controlled by changing the stimulation electrode and the stimulation current, based on the Proportional Integral (PI) control method using a visual feedback control system. This study was aimed at controlling the leg motion by stimulating the peripheral nerves using the neurostimulator.

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