Every parametric speech synthesizer requires a good excitation model to produce speech that sounds natural. In this paper, we describe efforts toward building one such model using the Liljencrants-Fant (LF) model. We used the Iterative Adaptive Inverse Filtering technique to derive an initial estimate of the glottal flow derivative (GFD). Candidate pitch periods in the estimated GFD were then l...

This paper presents a new design of adaptive fuzzy variable structure control to solve the traditional problem of model reference adaptive control (MRAC) for a class of single-input, single-output minimum-phase uncertain nonlinear systems via backstepping. Instead of taking the tedious coordinate transformation and yielding a "hard" high-gain controller, we introduce smooth B-spline-type member...

As the chirally restored phase ends with T coming down to Tc, a phase resembling a mixed phase is realized, during which the hadrons (which are massless at Tc in the chiral limit) get their masses back out of their kinetic energy. The gluon condensation energy is fed into the system to keep the temperature (nearly) constant. Lattice results for the gluon condensation are matched by a Nambu-Jona...

Speech po1arit.y is crucial in many speec:t~ processing firlds. \Ve present, a nowl method to detrrrnine polarity of speech signals from gradient of spurious glot.t,al wavcsforms. VVe u&e t,he iterative adaptive LPC inverse filtering to cancel c:ff’ect of vocal t,ract transfer function while maintaining the most properties of source excitation. l’hcr~ we take the first-derivative (gradient. com...

Identification of multi-input muiti-output [MIMO) Section 3 of the naner is concerned with the case -~~~ ~-. ~-~~r ~ ~ r ~ ------.---~~ ~ ~ ..~.. linear dynamic systems is considered for the c&e when the measurements are obtained during closed loop operation. Both where the disturbances in the feedback path are a noise free and noisv feedback situations are analvsed. For the full rank stochasti...

Analysis of exclusively-kinetic two-link underactuated mechanical systems is undertaken in this paper. It is first shown that such systems are not full-state feedback linearizable around any equilibirium point. Also, the equilibrium points for which the system is small-time locally controllable (STLC) is at most a one dimensional submanifold. A concept less restrictive than STLC, termed the sma...

For non-minimum phase plants, a partial LTR design of optimal output disturbance cancellation controllers is discussed. A target recoverable by the partial LTR procedure is identified as an output injection with a frequency-shaped gain matrix. The partial LTR result is used to clarify system-theoretic meaning of enforcing the minimum phase LTR procedure. It is shown that the partial LTR procedu...

This paper focuses on the tracking performance limitation for a class of networked control systems(NCSs) with two-channel constraints. In communication channels, we consider bandwidth, energy constraints and additive colored Gaussian noise(ACGN) simultaneously. In plant, non-minimal zeros and unstable poles are considered; multi-repeated zeros and poles are also applicable. To obtain the optima...

The purpose of this paper is two-fold, firstly it describes the development and modelling of an experimental test facility as a platform on which to assess the performance of Iterative Learning Control (ILC) schemes. This facility includes a non-minimum phase component. Secondly, P-Type, D-Type and phase-lead types of the algorithm have been implemented on the test-bed, results are presented fo...

Design of robust controllers for uncertain non-minimum phase and unstable plants with the Quantitative Feedback Theory (QFT) is addressed in this paper. Several counterexamples including non-minimum phase plants and unstable plants are given to illustrate the errors in Horowitz and Sidi method 7, 5]. It is shown that the stability requirement of the new nominal plants is misused or ignored in t...