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Der Wunsch nach Authentizität wird häufig als Motiv für eine Behandlung in der plastischen Chirurgie angeführt. Der Beitrag legt dar, was unter Authentizität verstanden werden kann, und diskutiert vor dem Hintergrund der Ethik diejenigen Begründungen, die einen Eingriff durch die plastische Chirurgie rechtfertigen oder verbieten. Zu diesem Zweck wird zwischen „Körper“ und „Leib“ unterschieden sowie...
In this paper the design process of robust H∞- control for a coaxial micro helicopter is presented. The process starts with the development of a nonlinear dynamic model reflecting all the important elements of the helicopter. The corresponding system parameters are identified using measurement data from test benches and real flight, as well as a nonlinear identification tool, the Covariance Matrix...
The steering system on a micro helicopter is the key element for control and navigation. For a sufficient control authority the steering has to be fast, precise, reliable and lightweight. While on full scale helicopters the choice of the steering mechanism is limited, there exist many possibilities to steer a helicopter in small scale. In this paper a survey on different concepts is given followed...
Whenever the realization of a swash plate mechanism is not feasible (e.g. due to miniaturization limitations), center of gravity steering is an interesting alternative to swash plate steering. We present an approach to describe the dynamic behavior of a coaxial micro helicopter steered by a center of gravity shifting mechanism. The mechanical design of an existing system is improved to increase mechanical...
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