Analysis and design algorithms for residual generators for non minimum phase systems are given. It is shown that H∞ optimization of residual generators applied directly to systems including non minimum phase zeros can be very conservative. To remove this conservatism in theH∞ optimization of the residual generators, a factorization of the non minimum phase system into a minimum phase part and a...

In this article, the problem of nonperiodic tracking–transition switching with preview is considered. Such a control problem exists in applications including nanoscale material property mapping, robot manipulation, and probe-based nanofabrication, where the output needs to track the desired trajectory during the tracking sections, and rapidly transit to another point during the transition secti...

Guidance and control of aircraft in the landing phase imposes extra pilot work loads, hence application of automatic landing control systems is of great importance. In this study automatic landing control systems are introduced and an optimal landing control system is designed. The control system performance criteria are based on minimum control effort. The designed system is simulated for a tr...

An H∞ control problem for a class of discrete-time systems with additional nonminimum phase property at the control input is addressed. First, the full information problem is dealt with by developing a discrete-time counterpart of the J-spectral factorization technique in the literature. Second, the output estimation problem is reduced to finite-dimensional one by examining the J-spectral facto...

It has been stated that the inverse filtering of room transfer functions is possible using multiple inputs under certain conditions [1]. In this paper we address these conditions from a numerical perspective. A method is developed to determine the numerical precision of multiple input inverse filtering techniques. This method is applied to two simulated rooms, and the numerical precision is est...

Using inverse filtering, voice source characteristics related to vocal £old adductory force, and the first formant frequency, are analyzed in six professional male singers and six male nonsingers repeatedly phonating the syllable /pae:/ in loud and soft phonation at different fundamental frequencies throughout the subjects' ranges. For each voice sample, inverse filtered air flow was recorded a...

This paper presents a new method for dereverberation of speech signals with a single microphone. For applications such as speech recognition, reverberant speech causes serious problems when a distant microphone is used in recording. This is especially severe when the reverberation time exceeds 0.5 of a second. We propose a method which uses the fundamental frequency ( ) of target speech as the ...

This paper explores the interplay of source correlates of accentuation, examining a hypothesis (the Voice Prominence Hypothesis) that different source parameters are involved and may serve as equivalent. It predicts that where accentuation is not marked by pitch salience there will be more extensive changes in other source parameters. This follows our assumption that prosodic entities such as a...

-In connection with loop transfer recovery of nonminimum phase systems, the purpose of this paper is two-fold: (1) to study the set of recoverable target loops and to establish necessary or/and sufficient conditions for a given plant to have at least one recoverable target loop, and (2) to show that the compensator structure developed earlier in Chen, Saberi and Sannuti [(1991) Automatica, 27, ...