small changes

content/publication/bibliography.bib

@@ -1590,9 +1590,9 @@ @Article{Bauer2019a
   title    = {Control of a Drag Power Kite over the Entire Wind Speed Range},
   journal  = {Journal of Guidance, Control, and Dynamics},
   year     = {2019},
-  volume   = {0},
-  number   = {0},
-  pages    = {1--16},
+  volume   = {42},
+  number   = {10},
+  pages    = {2167--2182},
   abstract = {A control scheme for drag power kites, also known as airborne wind turbines, for the entire wind speed range is proposed, including 1) a temperature controller allowing for temporary overloading of the powertrain; 2) a limitation controller ensuring that power, force, speed, and actuator constraints are satisfied; 3) a tangential flight speed controller; and 4) a tangential force control allocation, which inverts the nonlinearities of the plant and allocates the flight speed controller’s tangential force demand to the available actuators. The drag power kite plant model is based on a point-mass model and a simple aerodynamics model with various drag contributions. Simulations are conducted with the parameters of the 20 kW Wing 7 developed by Makani Power, Inc. The proper working of the control scheme is indicated by the good match of the simulation results with independent simulation results and measurements published by Makani. A temporary overloading of the powertrain with about twice the nominal power can be concluded as a requirement; otherwise the mean power would be significantly lower. Because of the reduction of the lift and thus reduction of the centripetal force at high wind speeds, the inside-down figure eight can be concluded as the best pattern.},
   date     = {2019-07-03},
   doi      = {10.2514/1.G004207},
@@ -1859,4 +1859,17 @@ @InProceedings{Williams2019a
   date      = {2019-07-10/2019-07-12},
 }
 
+@InProceedings{DeSchutter2019a,
+  author    = {De Schutter, Jochem and Leuthold, Rachel and Bronnenmeyer, Thilo and Paelinck, Reinhart and Diehl, Moritz},
+  title     = {Optimal Control of Stacked Multi-Kite Systems for Utility-Scale Airborne Wind Energy},
+  booktitle = {Proceedings of the IEEE Conference on Decision and Control (CDC)},
+  year      = {2019},
+  pages     = {1--6},
+  address   = {Nice, France},
+  abstract  = {Within the prevailing single-kite paradigm, the current roadmap towards utility-scale airborne wind energy (AWE) involves building ever larger aircraft. Consequently, utility-scale AWE systems increasingly suffer from similar upscaling drawbacks as conventional wind turbines. In this paper, an alternative upscaling strategy based on stacked multi-kite systems is proposed. Although multi-kite systems are well-known in the literature, the consideration of stacked configurations extends the design space even further and could allow for significantly smaller aircraft, and therefore possibly to cheaper, mass-producible utility-scale AWE systems. To assess the potential of the stacking concept, optimal control is applied to optimize both system design and flight trajectories for a range of configurations, at two different industry-relevant wind sites. The results show that the modular stacking concept effectively decouples aircraft wing sizing considerations from the total power output demand. An efficiency increase of up to 20% is reported when the harvesting area for the same amount of aircraft is doubled using a stacked configuration. Moreover, it is shown that stacked configurations can more than halve the peak power overshoot within one power cycle with respect to conventional single-kite systems.},
+  date      = {2019-12-11/2019-12-13},
+  projects  = {ESR3},
+  url       = {https://cdn.syscop.de/publications/DeSchutter2019.pdf},
+}
+
 @Comment{jabref-meta: databaseType:bibtex;}