The computationally intense nature of blade element rotorcraft math models has limited their use in real-time simulations to large mainframe computers or special purpose computer systems. blade element models are, however, necessary to accurately reproduce the rotorcraft response during complex… More

Modern computer technology offers the capability to perform real-time processing of mathematical models far more sophisticated than those currently being utilized in training applications. the capability to cost effectively implement blade element rotor models in real time using multiprocessor… More

Single rotor helicopters have often encountered an unanticipated right yaw (ury). this occurs predominantly at low speed in ground effect with the relative wind from the left or rear. this appears to be caused by aerodynamic interference phenomena that can only be analytically modeled by a free… More

Current research in rotorcraft analysis disciplines has been extensive but in parallel paths. specifically, on going research continues in computational fluid dynamics (cfd) for the nonlinear aerodynamic analysis of rotor blades and computional structural dynamics (csd) for the nonlinear structural… More

The project is developing and applying an algorithm that realizes a practical solution to the problem of an optimal route location for surface transportation or utility corridors. the algorithm, implemented as real-world computer aided design system, is based on the shortest path algorithm with… More

Complex Helicopter Analysis codes, such as the SEcond Generation Comprehensive Analysis System (2GCHAS), have been developed toprovide a common framework for interdisciplinary design and analysis of rotorcraft systems. A major limitation on the effectiveness of the second generation comprehensive… More

The Second Generation Helicopter Analysis System (2GCHAS) has been developed to provide a common framework for interdisciplinary design and analysis of rotorcraft systems. A current limitation is the level of sophistication available in modeling advanced control systems. Advanced Rotorcraft… More

With the growing acceptance of the new ADS-33C handling qualities specification, it is essential that flight test engineers and pilots be effectively trained in this new methodology as soon as possible. personal Computer (PC) based tutorials provide convenient and cost effective training aids,… More

We propose to develo a numerically efficient rotorcraft trim and transient response algorithm. The algorithm is intended for application in a periodic dynamic system with a large number of degrees of freedom as is commonly the case in current comprehensive rotorcraft analysis codes (such as… More

We Propose to enhance rotorcraft simulation model to support land and sea-based flight testing and operational analysis. The model enhancement will resolve the long-time perplexing problems related to the fundamental simulation requirement for an accurate prediction of rotorcraft response in… More

We propose to develo a numerically efficient rotorcraft trim and transient response algorithm. The algorithm is intended for application in a periodic dynamic system with a large number of degrees of freedom as is commonly the case in current comprehensive rotorcraft analysis codes (such as… More

We Propose to enhance rotorcraft simulation model to support land and sea-based flight testing and operational analysis. The model enhancement will resolve the long-time perplexing problems related to the fundamental simulation requirement for an accurate prediction of rotorcraft response in… More

Recent breakthroughs in virtual prototyping of flight vehicles Coupled with modern methods of Intelligent systems technology provide an opportunity to apply powerful new software tools to the design and testing of both flight vehicles and their associated training devices. Advanced Rotorcraft… More

Shipboard landing presents a multitude of problems for rotorcraft that must be addressed to assure safe operation. The interaction of the rotor downwash with the ship's deck and the interaction of the ship airwake with the rotor are two key areas of this

"This SBIR is intended to develop a high fidelity modeling andsimulation tool to support shipboard rotorcraft operationanalysis. The efforts address not only the enhancement of eachindividual modeling discipline that is related to the simulationof rotorcraft shipboard testing, but also their… More

"Increased reliance on shipboard deployment of aircraft in modern combat operations has placed increased demands on the efficiency and safety of shipboard aircraft operations. The ability to optimize design parameters early in the development cycle canresult in considerable savings. A shipboard… More

"Simulation models of rotorcraft are used in a wide variety of Army applications. Conceptual Design applications use models of the sensitivity of performance to design parameters. Preliminary and detailed design applications use physical models to adddetail and predict stability and loads. Test and… More

"Safe and effective shipboard aircraft operation is a challenging task for both pilot and ship deck operators. The launch and recovery of manned and autonomous aircraft are strongly affected by ship motion in the ocean wind and wave environment, the shipinduced air wake, and aircraft interaction… More

The launch and recovery of manned and autonomous aircraft are strongly affected by the ship motion resulting from the ocean wind and wave environment, the ship induced airwake, and aircraft interaction with the ship dynamics and the ship airwake. We propose to develop an advanced aircraft/ship… More

Simulation models of rotorcraft are used in a wide variety of Army applications. Conceptual Design uses performance models to size a rotorcraft. Preliminary and detailed design use detailed physical models to predict handling qualities and loads. Test andevaluation uses models to select maneuvers,… More

Progress has been made in modeling and simulation of the shipboard operation cases to support analysis of the single aircraft landing task. However, limitations exist where the analysis does not include the interference arising from simultaneous operationof multiple aircraft on the same ship. To… More

Progress has been made in the modeling and analysis of the single aircraft shipboard landing task. However, limitations exist in current simulations where the analysis does not include the interference arising from simultaneous operation of multiple aircraft on the same ship. To enhance the modeling… More

There have been increased applications of the ducted/shrouded fan as a safe, low noise, and effective anti-torque device for modern rotorcraft. Ducted/shrouded fans have also attracted much interest as the main VTOL lifting devices for recent uninhabited air vehicle (UAV) developments because of… More

The ducted/shrouded fan has become widely adopted in modern rotorcraft as a safe,low noise, and effective anti-torque device. Ducted fans have also found popular applications as the main VTOL lifting device for recent uninhabited air vehicle (UAV) and flying automobile developments because of their… More

ART proposes to develop a technical basis for augmenting the current ADS-33E-PRF to accommodate the needs of improving its applicability to shipboard rotorcraft and heavy lift helicopter flying qualities specifications. The research effort will emphasize the new criteria development, the evaluation… More

Progress has been made in developing high fidelity rotorcraft simulation models in order to adequately predict rotorcraft performance, stability, and loads in support of design, operation, and flight testing. Limitations, however, exist in several essential aspects of modeling rotor… More

This SBIR is to develop advanced rotorcraft aerodynamic modules to significantly enhance and improve the analytical prediction of rotorcraft performance, stability, dynamic response, and loads to support vehicle design, manufacturing, operation, and flight testing. The research and development will… More

Rotor induced flow modeling is a central part for almost every aspect of rotorcraft simulation and analysis. There are, however, challenges in the accurately predicting the unsteady rotor wake transportation, especially when it interacts with aerodynamic disturbances from nearby aerodynamic bodies… More

Rotorcraft shipboard operations have been an essential but demanding aspect of modern maritime activities. The shipboard rotorcraft are strongly affected by the unsteady ship airwake and the dynamic ship motion. Significant progress has been made in analyzing these effects on the shipboard… More

While new technology is making flight simulators more affordable, validating the simulators for training applications remains costly. This is mostly due to the inefficiency and inconsistency of the subjective validation approach currently used. Performing trial and error iterations based on the… More

With the increasing demand for higher performance rotorcraft that will carry heavier payloads, travel longer distances, and hover at higher altitudes in warmer climates, more advanced and novel rotor designs have become necessary. The fixed configuration blade design has reached its optimum… More

This SBIR is to develop a technical basis for augmenting the current ADS-33E-PRF to accommodate the needs of improving its applicability to shipboard rotorcraft and heavy lift helicopter flying qualities specifications. Significant accomplishments were achieved from the Phase I efforts which… More

The focus of this research is to develop an advanced rotorcraft comprehensive analysis tool that will significantly improve the accuracy of the performance, load, vibration, and aeroelastic stability predictions. The product is intended to support new aircraft design and engineering applications.… More

This research is dedicated to developing methodology and software to significantly improve the computational efficiency of comprehensive rotorcraft analysis tools in support of aircraft design and engineering applications. The development will emphasize multi-level scalable parallel processing… More

Progress has been made in developing high fidelity rotorcraft simulation tools in support of design, operation, and flight testing. Limitations, however, exist in rotorcraft simulation validation and continued model updating in order to improve the correlation with flight tests. ART proposes to… More

This SBIR is aimed at developing an advanced and unified rotorcraft flight control system design and testing tool that can account for the effects of both the ship motion and the ship airwake. The development will integrate the various aspects of the shipboard simulation and analysis to provide a… More

This research is dedicated to the development of a high fidelity analysis tool to accurately predict the full aircraft aeroacoustic field in subsonic, transonic,and supersonic regimes. Innovative two-step, implicit Monotonically Integrated LES (MILES) and DES (MIDES) methods for jet and airframe… More

The helicopter rotor wake is a complicated problem and remains an extremely challenging aspect of rotorcraft performance and dynamic response analysis. The rotor/fuselage and/or rotor/ship aerodynamic interaction further complicates the problem. This STTR is dedicated to developing a solution for… More

This research is dedicated to developing methodology and software to significantly improve the computational efficiency of comprehensive rotorcraft analysis tools in support of aircraft design and engineering applications. The development will emphasize two critical aspects: high fidelity… More

This proposal addresses the planned improvements to advance the Rotorcraft Comprehensive Analysis System (RCAS) during Phase II of this SBIR. Significant improvements will be implemented to expand RCAS functionality, accuracy, and usability. RCAS functionality will be greatly expanded with the… More

The unsteady rotorcraft wake emanated from rotors, wings, and lifting surfaces is a physically complicated problem and remains a difficult aspect of comprehensive rotorcraft analysis. The recent development of a viscous vortex particle method (VVPM) shows very high promise for providing a… More

The rotorcraft aerodynamic interaction is a complicated problem and remains an extremely challenging aspect of rotorcraft analysis. This STTR is dedicated to developing a solution for the complicated rotorcraft aerodynamic interaction problem. The Phase I research coupled a state-of-the-art vortex… More

The unsteady rotor wake is a complicated flow problem and remains a challenging aspect of comprehensive rotorcraft analysis. The Phase I research has shown that a viscous vortex particle method (VVPM) can provide a first-principle-based solution to the challenging rotor wake problem. Applying VVPM… More

Modeling turboshaft engine and drivetrain dynamics is a vital part of modern rotorcraft simulation as they are closely coupled with the main/tail rotor dynamics and impact the aircraft performance and transient response.The current engine models for real time simulation are mostly custom built and… More

This research is dedicated to developing high fidelity lag damper models to significantly improve the accuracy of the analysis of the rotor lead-lag damper forces over a wide range of blade lead-lag motion amplitudes, temperatures, and frequencies in support of aircraft design and engineering… More

On-deck positioning and securing is an essential aspect of rotorcraft shipboard operations. The controlled or restrained on-deck positioning of aircraft is a complicated process that is strongly affected by the unsteady ship motion, the turbulent wind condition, and the aircraft and ship flight… More

A virtual flight simulation provides a cost effective tool for testing the aircraft systems and evaluating the controllability for new aircraft designs and upgrades of existing designs. Development of a virtual pilot that can address a range of rotorcraft maneuvers and which can be adapted to… More

Modeling engine and drivetrain (i.e., propulsion system) dynamics and control is a vital part of modern rotorcraft simulation as they are closely coupled with the rotor dynamics and impact the aircraft performance and transient response. The current engine modeling method for real time rotorcraft… More

There is a need in the wind industry for a comprehensive analysis code that is tailored to wind turbine analysis, intuitive to use, fast, accurate, and scalable. Advanced Rotorcraft Technology, Inc. (ART) would like to fulfill this need by adapting its industry leading comprehensive helicopter… More

Flight simulation provides a cost effective tool for testing aircraft systems. Testing avionics systems across a particular flight profile requires driving the simulation through the flight profile to generate the required simulated sensor data. Testing avionics systems with a human pilot is costly… More