Limits...
Helicopter Control Energy Reduction Using Moving Horizontal Tail.

Oktay T, Sal F - ScientificWorldJournal (2015)

Bottom Line: Control energy savings due to this MHT idea with respect to a conventional helicopter are calculated.Parameters of helicopter FCS and dimensions of MHT are simultaneously optimized using a stochastic optimization method, namely, simultaneous perturbation stochastic approximation (i.e., SPSA).In order to observe improvement in behaviors of classical controls closed loop analyses are done.

View Article: PubMed Central - PubMed

Affiliation: College of Aviation, Erciyes University, 38039 Kayseri, Turkey.

ABSTRACT
Helicopter moving horizontal tail (i.e., MHT) strategy is applied in order to save helicopter flight control system (i.e., FCS) energy. For this intention complex, physics-based, control-oriented nonlinear helicopter models are used. Equations of MHT are integrated into these models and they are together linearized around straight level flight condition. A specific variance constrained control strategy, namely, output variance constrained Control (i.e., OVC) is utilized for helicopter FCS. Control energy savings due to this MHT idea with respect to a conventional helicopter are calculated. Parameters of helicopter FCS and dimensions of MHT are simultaneously optimized using a stochastic optimization method, namely, simultaneous perturbation stochastic approximation (i.e., SPSA). In order to observe improvement in behaviors of classical controls closed loop analyses are done.

No MeSH data available.


Responses of helicopter classical controls.
© Copyright Policy - open-access
Related In: Results  -  Collection


getmorefigures.php?uid=PMC4477250&req=5

fig7: Responses of helicopter classical controls.

Mentions: In Figure 7, closed loop responses of all traditional helicopter controls (i.e., 3 main rotor and 1 tail rotor controls) are given for both classical helicopter and helicopter with MHT. The most important observation related to the traditional helicopter controls is that there is substantial reduction in the peaks of the absolute values of these controls if MHT is utilized. It can be easily seen from this figure that lateral cyclic blade pitch angle (i.e., θc) experiences with smallest reduction. Moreover, the control variations are smooth and small.


Helicopter Control Energy Reduction Using Moving Horizontal Tail.

Oktay T, Sal F - ScientificWorldJournal (2015)

Responses of helicopter classical controls.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4477250&req=5

fig7: Responses of helicopter classical controls.
Mentions: In Figure 7, closed loop responses of all traditional helicopter controls (i.e., 3 main rotor and 1 tail rotor controls) are given for both classical helicopter and helicopter with MHT. The most important observation related to the traditional helicopter controls is that there is substantial reduction in the peaks of the absolute values of these controls if MHT is utilized. It can be easily seen from this figure that lateral cyclic blade pitch angle (i.e., θc) experiences with smallest reduction. Moreover, the control variations are smooth and small.

Bottom Line: Control energy savings due to this MHT idea with respect to a conventional helicopter are calculated.Parameters of helicopter FCS and dimensions of MHT are simultaneously optimized using a stochastic optimization method, namely, simultaneous perturbation stochastic approximation (i.e., SPSA).In order to observe improvement in behaviors of classical controls closed loop analyses are done.

View Article: PubMed Central - PubMed

Affiliation: College of Aviation, Erciyes University, 38039 Kayseri, Turkey.

ABSTRACT
Helicopter moving horizontal tail (i.e., MHT) strategy is applied in order to save helicopter flight control system (i.e., FCS) energy. For this intention complex, physics-based, control-oriented nonlinear helicopter models are used. Equations of MHT are integrated into these models and they are together linearized around straight level flight condition. A specific variance constrained control strategy, namely, output variance constrained Control (i.e., OVC) is utilized for helicopter FCS. Control energy savings due to this MHT idea with respect to a conventional helicopter are calculated. Parameters of helicopter FCS and dimensions of MHT are simultaneously optimized using a stochastic optimization method, namely, simultaneous perturbation stochastic approximation (i.e., SPSA). In order to observe improvement in behaviors of classical controls closed loop analyses are done.

No MeSH data available.