By Raziye Tekin, Harald Pfifer (auth.), Qiping Chu, Bob Mulder, Daniel Choukroun, Erik-Jan van Kampen, Coen de Visser, Gertjan Looye (eds.)
Following the profitable 1st CEAS (Council of eu Aerospace Societies) expert convention on counsel, Navigation and keep watch over (CEAS EuroGNC) held in Munich, Germany in 2011, Delft collage of know-how fortunately accredited the invitation of organizing the 2nd CEAS EuroGNC in Delft, The Netherlands in 2013. The objective of the convention is to advertise new advances in aerospace GNC concept and applied sciences for reinforcing safeguard, survivability, potency, functionality, autonomy and intelligence of aerospace structures utilizing on-board sensing, computing and structures. an outstanding push for brand spanking new advancements in GNC are the ever larger security and sustainability standards in aviation. remarkable growth used to be made in new examine fields reminiscent of sensor and actuator fault detection and analysis, reconfigurable and fault tolerant flight keep an eye on, on-line secure flight envelop prediction and defense, on-line international aerodynamic version identity, on-line international optimization and flight disappointed restoration. All of those demanding situations depend upon new on-line suggestions from on-board computing platforms. Scientists and engineers in GNC were constructing version established, sensor dependent in addition to wisdom established techniques aiming for hugely strong, adaptive, nonlinear, clever and self reliant GNC platforms. even supposing the papers awarded on the convention and chosen during this booklet couldn't probably disguise the entire current demanding situations within the GNC box, lots of them have certainly been addressed and a wealth of recent principles, strategies and effects have been proposed and presented.
For the 2nd CEAS expert convention on information, Navigation and keep an eye on the overseas application Committee carried out a proper evaluation method. every one paper used to be reviewed in compliance with stable magazine perform via not less than self reliant and nameless reviewers. The papers released during this e-book have been chosen from the convention lawsuits in accordance with the implications and suggestions from the reviewers.
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Additional resources for Advances in Aerospace Guidance, Navigation and Control: Selected Papers of the Second CEAS Specialist Conference on Guidance, Navigation and Control
Let φ denote the roll attitude of an aircraft, p denote the roll rate and δa denote the aileron control input . Then a model for wing rock dynamics is (): φ˙ = p p˙ = δa + Δ (x), (38) (39) where Δ (x) = W0 + W1 φ + W2 p + W3 |φ |p + W4 |p|p + W5 φ 3 . 0214. 8. A simple inversion model has the form ν = δa . The linear part of the control law is given by ν pd = −4φ − 2p for the exclusive adaptive as well as the MPC part of the control framework of Figure 1. These values are chosen as they result in good baseline control performance without exciting high-gain oscillations.
The second term on the right hand side of Equations 13 to 15 is the detrimental contribution by the saturation. Comparing between the proposed and conventional schemes, it can be seen the numerator of the saturation dynamics for both schemes are the same at (K4s − 1) from Equations 10 to 15. H. Lo et al. by noting that K4s < 1 during actuator saturation. This implies the magnitude of the effect caused by the saturation term for the conventional scheme will be bigger than the proposed scheme. The alleviation in actuator saturation in the proposed scheme in this case is due to the availability of actuator redundancy, which enables the controller to increase the commands of the other non-saturated actuators.
This may not fully exploit the analytical redundancies found in many systems to improve on the performance, or enhance its robustness to faults. In our previous study , a new alternative actuator control scheme for a four tail fin controlled missile is proposed to alleviate the performance degradation results from actuator saturation. To utilize the analytically redundant actuator, the proposed scheme regulates the error in the virtual moment space rather than the physical fin deflection space.