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Isochronal synchronization is a unique phenomenon in which physically distant oscillators wired together relax into zero-lag synchronous behavior over time. Such behavior is observed in natural processes and, recently, has been considered for promising applications in communication. Towards technological development of devices that explore isochronal sync, stability issues of the phenomenon need to...
To clarify the operation principle of the self-injection locked NRD guide Gunn oscillator, we investigated its equivalent circuit model in this paper. At first, a ceramic resonator for self-injection locking was represented by a parallel resonant circuit and it was side-coupled to the NRD guide at a point apart from the Gunn diode. By using this circuit model, a stability factor of the Gunn oscillator...
In order to keep a plant running until the next scheduled maintenance, a Prognosis and Health Monitoring (PHM) system may provide valuable information that can be used to distribute the control effort among the redundant actuators to avoid breakdown due to degradation. This paper proposes a Model Predictive Control (MPC) approach capable of distributing the control effort among actuators on the basis...
Recently, applications of robots for home assistant, helper and rehabilitation have attracted considerable attention, and various humanoid robots are developed. In such environments, robots have to handle unexpected disturbance very quickly. Especially, external forces owing to collision to obstacles or people are one of significant problems, because they causes risks to injure human bodies or to...
Statistical process control (SPC) techniques have been successfully applied to a great variety of industrial processes. This paper presents the use of these techniques for the monitoring of the health state of aircraft flap and slat systems. Different approaches of univariate SPC and multivariate SPC (MSPC) are compared. The MSPC methods considered are Hotelling's T2 and Runger U2. Results of the...
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