Self-sensing refers to extracting the position information from the electromagnetic signals instead of from a physical position sensor. Self-sensing actuator has the benefit of significantly reducing hardware effort. In this paper, we investigate selfsensing actuators applied in direct acing proportional valves. The study is based on the configuration of a dual-solenoid actuator where each sole...

The demand for real-time or in situ structural health monitoring has stimulated efforts to integrate self and environmental sensing capabilities into structural composite materials. Essential to the application of smart composites is the issue of the mechanical coupling of the sensor to the host material. In this study various methods of embedding sensors within the host composite material are ...

We are developing a system to help users improve the quality of their sleep by monitoring environmental factors that disrupt sleep and providing feedback. This system, called Lullaby, has several design goals. Lullaby’s sensor suite should be practical for deployment into bedrooms: it must be unobtrusive, inexpensive, and respect users’ privacy in this sensitive context. Lullaby should identify...

A signal processing technique is presented by which the position of a rotor supported in magnetic bearings may be deduced from the bearing current waveform. The bearing currents are presumed to be developed with a two state switching amplifier which produces a substantial high frequency switching ripple. This ripple is demodulated using a model reference parameter estimation technique which ext...

In order to facilitate continuous and quick adaptation to the change of environment and use requirement, this paper presents a self-evolution method for the remote sensing information service chain to keep effective and robust of service chain with lesser modification, and to maximize all users’ utilization under concurrent user requirements. According to the driver forces of service chain chan...