Flight Evaluation of the New Handling Qualities Criteria Using the BO 105

Ockier, C.J.

doi:10.4050/jahs.41.67

Cited by 11 publications

(3 citation statements)

References 2 publications

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“…II. The BO-105, whose flight dynamics model forms the basis of simulation in this research, is known to possess poor HQ for precision maneuvering tasks [61] [62]. Therefore, it becomes essential to augment the bare-airframe dynamics and simplify the helicopter's responses for the shipboard landing task.…”

Section: B Control Augmentation Using Robust Sliding Mode Flight Cont...mentioning

confidence: 99%

Piloted Simulation of Helicopter Shipboard Recovery with Visual and Control Augmentation

Mehling

Halbe

Gasparac

et al. 2021

AIAA Scitech 2021 Forum

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Shipboard launch and recovery of helicopters continue to pose operational challenges even for experienced pilots. The factors affecting pilot workload include unsteady ship motion, the influence of ship air wakes on helicopters, insufficient visual cues, and adverse weather conditions. The goal of the current research is to investigate novel visual and control augmentation techniques and evaluate their impact on pilot workload and handling qualities for shipboard recovery operations. This paper first outlines a helicopter-ship dynamic interface model developed and integrated into our existing rotorcraft simulation environment (ROSIE). It then describes a visual augmentation concept using a see-through helmet-mounted display (HMD) system for enhancing the pilot's visual cueing environment during the shipboard approach and landing tasks. Next, it describes the synthesis of robust nonlinear control laws for achieving advanced helicopter response types with predicted Level 1 handling qualities. Lastly, the paper reports the results of simulation tests of maritime mission task elements by four experimental test pilots with different levels of augmentation and under different environmental conditions. Results on navigation performance, workload indices, and handling quality ratings indicate a decreased workload and improved handling qualities to almost Level 1 with the assistance of the visual and control augmentation system. Moreover, all piltos stated a higher situational awareness while operating in degraded visual environment conditions using visual and control augmentation.

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Section: B Control Augmentation Using Robust Sliding Mode Flight Cont...mentioning

confidence: 99%

Piloted Simulation of Helicopter Shipboard Recovery with Visual and Control Augmentation

Mehling

Halbe

Gasparac

et al. 2021

AIAA Scitech 2021 Forum

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“…Recent works on the investigation of flight control and handling qualities of helicopter invariably consider ADS-33 as guidelines (Padfield, 1996;Pavel and Padfield, 2002;Rysdyk and Calise, 1998;Walker, 2003). The estimation of the new handling qualities criteria in flight has been carried out on the BO105 helicopter (Ockier, 1996).…”

Section: Introductionmentioning

confidence: 99%

Design of a stability augmentation system for a helicopter using LQR control and ADS‐33 handling qualities specifications

Kumar

Sampath²,

Sundaram³

et al. 2008

Aircraft Eng & Aerospace Tech

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Purpose -This paper aims to present the design of a stability augmentation system (SAS) in the longitudinal and lateral axes for an unstable helicopter. Design/methodology/approach -The feedback controller is designed using linear quadratic regulator (LQR) control with full state feedback and LQR with output feedback approaches. SAS is designed to meet the handling qualities specification known as Aeronautical Design Standard (ADS-33E-PRF). A helicopter having a soft inplane four-bladed hingeless main rotor and a four-bladed tail rotor with conventional mechanical controls is used for the simulation studies. In the simulation studies, the helicopter is trimmed at hover, low speeds and forward speeds flight conditions. The performance of the helicopter SAS schemes are assessed with respect to the requirements of ADS-33E-PRF. Findings -The SAS in the longitudinal axis meets the requirement of the Level 1 handling quality specifications in hover and low speed as well as for forward speed flight conditions. The SAS in the lateral axis meets the requirement of the Level 2 handling quality specifications in both hover and low speed as well as for forward speed flight conditions. The requirements of the inter axis coupling is also met and shown for the coupled dynamics case. The SAS in lateral axis may require an additional control augmentation system or adaptive control to meet the Level 1 requirements. Originality/value -The study shows that the design of a SAS using LQR control algorithm with full state and output feedbacks can be used to meet ADS-33 handling quality specifications.

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“…The Handling Qualities Requirements for Military Rotorcraft: Aeronautical Design Standard 33 (ADS-33)d) is formally a US Army standard for the RAH-66 helicopter but, having been developed from international collaboration, it has acquired a more general applicability (2,3). An innovative part of these requirements is the assessment of the overall handling qualities of a helicopter by its performance and handling characteristics in a set of standard manoeuvres.…”

Section: Introductionmentioning

confidence: 99%

The use of inverse simulation for preliminary assessment of helicopter handling qualities

Thomson

Bradley

1997

Aeronaut. j.

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This paper describes a method for using inverse simulation to obtain a preliminary assessment of helicopter handling qualities. Formal descriptions of standard manoeuvres, defined to establish the handling qualities of military helicopters, are used to drive an inverse simulation of a subject helicopter. The simulation generates the controls and states of the helicopter as it executes the manoeuvre and the results may be used to calculate values of quickness, a parameter defined to measure responsiveness. Initial results reveal that in the context of inverse simulation quickness is independent of vehicle configuration when, as specified in the requirements, the quickness is based on the helicopter's kinematic states. An alternative quickness parameter, associated with the control displacements required to fly the manoeuvre is shown to be capable of discriminating between the pilot workload involved in flying two different configurations through the same manoeuvre.

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Flight Evaluation of the New Handling Qualities Criteria Using the BO 105

Cited by 11 publications

References 2 publications

Piloted Simulation of Helicopter Shipboard Recovery with Visual and Control Augmentation

Piloted Simulation of Helicopter Shipboard Recovery with Visual and Control Augmentation

Design of a stability augmentation system for a helicopter using LQR control and ADS‐33 handling qualities specifications

The use of inverse simulation for preliminary assessment of helicopter handling qualities

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