In this paper, the general structure of anti-windup control system based on left coprime factorization is proposed. First, the command responses of anti-windup control system are investigated using transfer function description, and the condition for avoiding windup phenomena is derived. The responses can be formulated easily by handling the input saturation as its equivalent input disturbance. Next, the conditions are explained using state space description. This analysis shows that the proposed system has very simple structure. For feedback

In this paper, the anti-windup strategy for two degree of freedom (TDOF) control system is proposed. In TDOF control system, the input saturation can be avoided by designing the suitable command response property for nominal model. In real controlled systems, however, the input saturation may occur because of unknown disturbance or plant variation. The proposed method can suppress the windup phenomena by modelling the limiter into TDOF controller and adjusting the limitation between feedback and feedforward control. The proposed anti-windup controller (AWC) has the form of left coprime factorization of feedback and feedforward controllers. The proposed method is evaluated by simulation and experiment of position control system of DC servo motor. 792T.

A 69-year-old woman without a remarkable family history presented with a 5-year history of dizziness and gait difficulty. Neurologic examinations revealed saccadic eye movement and mild limb and truncal ataxia. She had tremor, hyporeflexia, and miosis. Fluid-attenuated inversion recovery images showed isolated bilateral paravermal hyperintensities1 (Figure). Skin biopsy demonstrated eosinophilic intranuclear inclusions positive for ubiquitin and p62 in the adipocytes and sweat gland cells. Expanded CGG repeats in NOTCH2NLC2 lead to the diagnosis of neuronal intranuclear inclusion disease (NIID). Corticomedullary lesions are sometimes absent in the early stages of NIID and isolated paravermal hyperintensities can be the initial radiologic findings.

Several 9-isopropyltriptycene derivatives were prepared by addition of benzynes to 9-isopropylanthracenes. Rotation about the C9-Cpr bond of these compounds is found to be frozen at room temperature on the NMR time scale. Those compounds which carry a substituent at 1-position exist as dl-isomers, at least overwhelmingly. No sign of existence of meso-isomer is found. On the other hand, 9-isopropyl-2,4-dimethyltriptycene exists as a mixture of d, l, and meso isomers, composition of which is almost 1 : 1 : 1. Repulsive nonbonding interaction is a decisive factor to determine the conformational preference. Approximate methods for line shape analysis of two methyl groups in an isopropyl group are discussed. Activation energies for rotation about the C9-Cpr bond increase with the increase in the size of 1-substituent except for the methyl group. The smaller effective size of the methyl group than that expected from the van der Waals radius is attributed to cogwheeling arrangement of methyl and isopropyl groups at the transition state of rotation and/or the higher energy level of the ground state due to the severe interaction between methyl and isopropyl groups.

Several 9-benzyltriptycene derivatives were prepared by addition of benzynes to 9-benzylanthracenes. Rotation about the C9–Cbenzyl bond of compounds with a substituent at a peri-position to the benzyl group was found to be frozen at low temperatures on the NMR time scale but not at room temperature. In contrast, compounds with two substituents at two peri-positions to the benzyl group showed a frozen rotation about the C9–Cbenzyl bond at room temperature. Distribution of the conformers, as judged from the PMR intensities, showed preference to the dl-isomers in spite of the fact that they are the ones which are highly disfavored by steric effects. Interpretation of the phenomenon was based on the fact that attractive interactions, mainly charge-transfer type, exist between the substituted benzo group in the triptycene skeleton and the benzene ring in the benzyl group.