Disturbance Observer-Based Control to Suppress Air Resonance for the EC135 ACT/FHS Research Helicopter

Greiser, Steffen

doi:10.2514/6.2015-0856

Cited by 3 publications

(2 citation statements)

References 4 publications

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“…Utilizing the actual flight data of the Rooivalk attack helicopter, Hager et al applied a reduced Brunovsky canonical observer to improve prediction capabilities in pitch axis [71]. In 2015, Greiser introduced a disturbance observer-based controller to suppress the roll oscillation for a highly modified research helicopter ACT/FHS [72]. The reduced order observer with disturbance compensation was tested on a ground-based simulator which simulates a highly sophisticated nonlinear model of ACT/FHS, and the desired experimental results will definitely motivate flight tests with the ACT/FHS for further validation.…”

Section: Observer Feedbackmentioning

confidence: 99%

Survey on Flight Control Technology for Large-Scale Helicopter

Jinshuo

2017

International Journal of Aerospace Engineering

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A literature review of flight control technology is presented for large-scale helicopter. Challenges of large-scale helicopter flight control system (FCS) design are illustrated. Following this, various flight control methodologies are described with respect to their engineering implementation and theoretical developments, whose advantages and disadvantages are also analyzed. Then, the challenging research issues on flight control technology are identified, and future directions are highlighted.

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Section: Observer Feedbackmentioning

confidence: 99%

Survey on Flight Control Technology for Large-Scale Helicopter

Jinshuo

2017

International Journal of Aerospace Engineering

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“…DOBC has been developed and applied in engineering in the recent years. 8,9 In the DOBC approach, the disturbance is estimated by the disturbance observer and then is used to compensate the disturbance effects by feedback or feedforward control. It can greatly reduce the disturbances without significantly changing the nominal performance of the existing system.…”

Section: Introductionmentioning

confidence: 99%

Disturbance observer–based control for missile non-strapdown seeker disturbance rejection

Song

Lin

Wang

2016

Advances in Mechanical Engineering

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Non-strapdown seeker disturbances which involve counter-electromotive force, spring restoring torque, and friction torque can corrupt the seeker tracking accuracy and degrade the missile guidance performance. In this article, the effects of guidance parameters and disturbances on the guidance stability and the miss distance are analyzed. It is shown that these disturbances have a pronounced deterioration in the guidance performance for the anti-air missile under high altitude and head-on interception. A new approach for disturbance rejection using disturbance observer-based control is presented. Disturbances in seeker stabilizing loop are estimated by the observer which has synthetic inputs based on the available seeker measurement signals. The estimates are fed back into the seeker inner loop to compensate the disturbances, and an additional loop is applied to improve the effect of disturbance compensation. The performance of the approach under non-nominal condition is analyzed. Simulation studies are performed to examine the effect of this control scheme. The result shows that this approach can effectively reduce the influences of corrupting disturbances and significantly improve the miss distance performance.

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High-fidelity rotorcraft simulation model: analyzing and improving linear operating point models

Greiser

2018

CEAS Aeronaut J

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Disturbance Observer-Based Control to Suppress Air Resonance for the EC135 ACT/FHS Research Helicopter

Cited by 3 publications

References 4 publications

Survey on Flight Control Technology for Large-Scale Helicopter

Survey on Flight Control Technology for Large-Scale Helicopter

Disturbance observer–based control for missile non-strapdown seeker disturbance rejection

High-fidelity rotorcraft simulation model: analyzing and improving linear operating point models

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