A discrete-time sliding mode proximate time-optimal servomechanism is developed using nonlinear sliding mode tangent to a reference velocity profile. Instead of a strong nonlinear function causing control chattering in discrete-time, a linear control is designed around the sliding surface. The resulting servomechanism delivers a bounded motion about the sliding surface even in the presence of p...

Abstract The present paper contains an analysis of the operation electric motor aerospace electromechanical servomechanism on a test bench. Particularly, description focuses electromagnetic phenomena three-phase stator circuit and switching phases as function applied control logic rotor position. activity was made possible through construction validation ‘digital twin’ physical model in Simscap...

Rack and Westbury (1969) showed that low frequency asynchronous stimulation of a muscle produces greater force compared to synchronous stimulation. This study tested the hypothesis that the difference results from the dynamic stretch of the common elastic elements. In 8 anaesthetized cats the soleus was attached to a servomechanism to control muscle length and record force. The ventral roots we...

Rack and Westbury showed that low-frequency asynchronous stimulation of a muscle produces greater force compared with synchronous stimulation. This study tested the hypothesis that the difference results from the dynamic stretch of the common elastic elements. In eight anesthetized cats, the soleus was attached to a servomechanism to control muscle length and record force. The ventral roots wer...

Robots are now requested to perform more and more complex tasks such as rescue activities in quite practical environments such as rough terrains. It is necessary for robots to have versatile joints that can flexibly adapt to such task environments and realize complex motions. It is desired to develop small and low cost actuators which can flexibly adapt to task environment. Flexibility in robot...

among the therapeutic options for achalasia are pneumatic dilatation (pd), an appropriate long-term therapy, and botulinum toxin injection (bt) that is a relatively short-term therapy. this study aimed to compare therapeutic effect of repetitive pneumatic dilation with a combined method (botulinum toxin injection and pneumatic dilation) in a group of achalasia patients who are low responder to ...