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This paper investigates the possibility of using a vibration energy harvesting (VEH) device as a communication receiver. By modulating the ambient vibration energy using a transmitting speaker, and demodulating the harvested power at the receiving VEH, we aim to transmit small amounts of data at low rates between two proximate devices. The key advantage of using VEH as a receiver is that the modulated...
Detecting the transportation mode of an individual's everyday travel provides useful information in urban design, real-time journey planning, and activity monitoring. In existing systems, accelerometer and GPS are the dominantly used signal sources which quickly drain the limited battery life of the wearable devices. In this paper, we investigate the feasibility of using the output voltage from the...
As an effective means of separating the vibration transmitted from rocket to satellite, the Whole-Spacecraft Vibration Isolation (WSVI) has been widely studied and applied in the past 20 years. Based on a new Circular Payload Adapter Fitting (CPAF), this paper studied the vibration principles of the CPAF and established corresponding vibration isolation model. With the piezoelectric stack actuators,...
The problem of active vibration isolation for a new type of whole-spacecraft vibration isolation system (WSVIS) is studied in order to improve the whole-spacecraft vibration isolation performance. Piezoelectric stack is selected as the actuator, and its dynamical equations are formulated. Based on the actual measured frequency response function, and using eigensystem realization algorithm, the state-space...
This paper deals with vibration reduction of the flexible manipulators bonded with piezoelectric patch actuator. The flexible manipulators' dynamic model is established using the theory of Euler-beam. This flexible structure has nonlinear characteristics and must be robust to uncertainties as well as disturbances, so a novel advanced control methodology called fuzzy global sliding mode control (FGSMC)...
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