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This paper discusses progress in designing a standardized interface for speech interaction with simple machines – the Universal Speech Interface (USI) project. We discuss the motivation for such a design and issues that must be addressed by such an interface. We present our current proposals for handling these issues, and comment on the usability of these(More)
—The properties of ultrasonic piezoelectric motors depend on applied load and temperature. The output behaviour is characterized by the nonlinearity of the power transmission at the friction interface between stator and rotor. Because of these inherently nonlinear characteristics, a resonant frequency tracking control is imperative for some particular(More)
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