نتایج جستجو برای: neurocontrol
تعداد نتایج: 102 فیلتر نتایج به سال:
The combination of low-thrust propulsion and gravity assists to enhance deep-space missions has proven to be a remarkable task. In this paper, we present a novel method that is based on evolutionary neurocontrollers. Themain advantage in the use of a neurocontroller is the generation of a control law with a limited number of decision variables. On the other hand, the evolutionary algorithm allo...
The adaptation of the work of the respiratory centers to suddenly arising respiratory resistance has been the object of interest of numerous investigators. Some of them believed that in this condition an essential role is played by the vagus nerves. Others considered that neurocontrol is mainly dependent on the respiratory muscles. The present study was undertaken to establish which of these tw...
Dynamic task-dependent regulation of reflexes controlled by the central nervous system plays an integral part in neurocontrol of locomotion. Such modifications of sensory-motor transmission can be studied by conditioning a test reflex with specific motor tasks. To elicit short-latency test reflexes, we applied a novel transcutaneous spinal cord stimulation technique that depolarizes large-diame...
Fibroblast growth factor-21 (FGF21) is closely related to various metabolic and cardiovascular disorders. However, the direct targets and mechanisms linking FGF21 to blood pressure control and hypertension are still elusive. Here we demonstrated a novel regulatory function of FGF21 in the baroreflex afferent pathway (the nucleus tractus solitarii, NTS; nodose ganglion, NG). As the critical co-r...
Wide-area coordinating control is becoming an important issue and a challenging problem in the power industry. This paper proposes a novel optimal wide-area coordinating neurocontrol (WACNC), based on wide-area measurements, for a power system with power system stabilizers, a large wind farm and multiple flexible ac transmission system (FACTS) devices. An optimal wide-area monitor (OWAM), which...
ii DECLARATION I, the undersigned, hereby declare that the work contained in this thesis is my own original work and has not previously in its entirety or in part been submitted at any university for a degree. iii Now to Him who is able to keep us from stumbling, And to bring us faultless Before the presence of His glory with exceeding joy, To God our Saviour, Who alone is wise, Be glory and ma...
In this study, the problem of controlling an unknown SISO nonlinear system in Brunovsky canonical form with unknown deadzone input in such a way that the system output follows a specified bounded reference trajectory is considered. Based on universal approximation property of the neural networks, two schemes are proposed to handle this problem. The first scheme utilizes a smooth adaptive invers...
1 During the last years, in the eld of \intelligent control" [1], several methodologies have shown up, like fuzzy, neural and genetic control, providing for the rst time practical solutions for nonlinear control problems, or supplying better or at least alternative solutions for some classic problems. Each of these new approaches has its own advantages and drawbacks, and that explains why they ...
The Tennessee Eastman (TE) Control Challenge proposed by Downs and Vogel [1] is a test bed problem for use in evaluating advanced process control methodologies from a plant-wide perspective. The dynamic model for the process (based on an actual industrial process) integrates the operation of five unit operations; viz. an exothermic, two-phase reactor, a partial condenser, a centrifugal compress...
Nine tetraplegic patients with C5 or C6 level spinal cord lesions had the Freehand System, an eight channel Functional Electrical Stimulation device, implanted to allow of hand opening and grasp. This paper describes the surgical implementation of the system and the challenges encountered. Seven of the subjects are currently daily users of the device. One subject is unable to use the system due...
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