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A new approach to gain scheduling linear dynamic controllers is illustrated on a pitch-axis autopilot design problem. In this application the linear controllers are designed at distinct operating conditions by H-Innnity methods. The gain scheduling procedure uses particular features of both the linear dynamic controllers and the controller connguration to(More)
This article examines dynamically scheduling multiple linear-time-invariant (LTI) controllers, designed using Hdp techniques, for systems with widely varying plant dynamics. The observerlfull-state feedback structure of the LTI H, controller is extended to accommodate the time-varying, nonlinear dynamics problem. A procedure for handling the variations that(More)
The role and impact of follow-up processes involving reactive side products in an electrocatalytic reaction is demonstrated for the electrooxidation of methanol at a Pt electrode. By using combined in situ infrared spectroscopy and online mass spectrometry and employing isotope-labeling techniques, it is shown that even small amounts of the incomplete(More)
We present a statistic evaluation of the azimuth orientations of flat-adsorbed oligopyridine molecules in disordered adlayers on Au(111) and (111) oriented Ag-adlayers on Ru(0001). On both surfaces, we find a strong preference for a set of twelve angles, which belong to one specific, unsymmetrical alignment and its symmetry equivalents. These angles are(More)
Aiming at a better understanding of the impact of reaction intermediates and reactive side products on electrocatalytic reactions under conditions characteristic for technical applications, i.e., at high reactant conversions, we have investigated the electrooxidation of methanol on a Pt film electrode in mixtures containing defined concentrations of the(More)
A novel thin-layer photoelectrochemical flow cell allowing the online mass spectrometric detection of volatile reaction products during photoelectrocatalytic reactions has been developed and applied for separating the contributions from photoelectrochemical water splitting and photoelectrooxidation of formic acid to the overall photocurrent in formic acid(More)
To better understand organic-molecule-assisted photo-electrochemical water splitting, photo-electrochemistry and on-line mass spectrometry measurements are used to investigate the photo-electrochemical oxidation of the C1 molecules methanol, formaldehyde, and formic acid over WO3 film anodes in aqueous solution and its competition with O2 evolution from(More)
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