Abstract: Embodiments disclosed herein present a spring system for use in a torque dependent rotor assembly designed to operate in resonance, where changes in applied torque controls the blade pitch angle and ultimately the movements of a rotary wing aircraft. More specifically, the present invention relates to a spring system used in such a rotor assembly where the stiffness of an associated spring member is allowed to vary in response to the torque applied from a motor to the assembly.

Abstract: The present embodiments disclose a torque dependent and resonant operating thrust-generating rotor assembly including a cyclic pitch control system for controlling tilting moments about a longitudinal rotor blade axis of one or more rotor blades, in order to control the pitch angle of the rotor blades and thereby also the horizontal movements of a helicopter vehicle or a rotary wing aircraft. A rotor torque assembly of the rotor assembly is further configured to operate in resonance, thereby providing a resonant gain effecting a rotational offset in relation to changes in torque generated by the motor.

Abstract: The present invention discloses a rotor control system where rapid changes in rotor torque are transferred into moment forces acting about the blade pitch axis of a rotor blade in a thrust-generating rotor, to ultimately control the movements of a rotary wing aircraft. The moment forces acting on the rotor blade are transferred through a carefully adjusted damping member in order to allow rapid changes in rotor torque to create cyclic changes in blade pitch angle, while slow or permanent changes are cancelled out and affects the rotational speed and the thrust generated by the rotor, without permanently affecting the blade pitch angle of individual rotor blades.

Abstract: Embodiments disclosed herein present a spring system for use in a torque dependent rotor assembly designed to operate in resonance, where changes in applied torque controls the blade pitch angle and ultimately the movements of a rotary wing aircraft. More specifically, the present invention relates to a spring system used in such a rotor assembly where the stiffness of an associated spring member is allowed to vary in response to the torque applied from a motor to the assembly.

Abstract: The present embodiments disclose a torque dependent and resonant operating thrust-generating rotor assembly including a cyclic pitch control system for controlling tilting moments about a longitudinal rotor blade axis of one or more rotor blades, in order to control the pitch angle of the rotor blades and thereby also the horizontal movements of a helicopter vehicle or a rotary wing aircraft. A rotor torque assembly of the rotor assembly is further configured to operate in resonance, thereby providing a resonant gain effecting a rotational offset in relation to changes in torque generated by the motor.

Abstract: The present invention discloses a rotor control system where rapid changes in rotor torque are transferred into moment forces acting about the blade pitch axis of a rotor blade in a thrust-generating rotor, to ultimately control the movements of a rotary wing aircraft. The moment forces acting on the rotor blade are transferred through a carefully adjusted damping member in order to allow rapid changes in rotor torque to create cyclic changes in blade pitch angle, while slow or permanent changes are cancelled out and affects the rotational speed and the thrust generated by the rotor, without permanently affecting the blade pitch angle of individual rotor blades.

Abstract: The embodiments herein disclose a personal UAV kit for storing, preparing and remote control of micro UAVs (40). The UAV kit includes a base unit (10), a control unit (30) and at least one UAV. The UAVs can typically be a winged aircraft with foldable wings or a helicopter with a two-bladed or foldable rotor. The base unit comprises UAV compartments for housing at least one UAV, bay (14) for storing the control unit, batteries and electronic components for charging, communication, control and processing and storing of data. In addition, the system includes an eye near display device for viewing system information and sensor data, typically live video, transmitted from the UAV.

Abstract: Local wind fields can be predicted if both the airspeed and the ground speed of the helicopter are known. An aircraft that uses an inertial navigation unit, autopilot and estimator allows a measure of ground speed to be known with good certainty. The embodiments herein extends this system to allow an estimate of the local wind field to be found without actively using an airspeed sensor, but instead combining the measurements of an accelerometer and a drag force model and a model of controlled aerodynamics of the aircraft to estimate the airspeed, which again can be used to estimate the local wind speed.

Abstract: The embodiments herein disclose a personal UAV kit for storing, preparing and remote control of micro UAVs (40). The UAV kit includes a base unit (10), a control unit (30) and at least one UAV. The UAVs can typically be a winged aircraft with foldable wings or a helicopter with a two-bladed or foldable rotor. The base unit comprises UAV compartments for housing at least one UAV, bay (14) for storing the control unit, batteries and electronic components for charging, communication, control and processing and storing of data. In addition, the system includes an eye near display device for viewing system information and sensor data, typically live video, transmitted from the UAV.

Abstract: A method and device for precise control of and controller design for aircrafts consisting of at least one spinning part and at least one non-spinning part is provided. The required torques for control of the spinning parts and for the non-spinning parts are continuously and individually calculated. All torques are combined to get the correct torque for the complete aircraft. Doing this, it's possible to continuously apply the correct torque, both correctly distributed among the roll and pitch axes (correct angle), and correct magnitude. The result is a decoupling of the roll and pitch axes, simplifying controller design to a design of two single input single output controllers, one for each axe.

Abstract: Different sampling rates between a playout unit and a capture unit are compensated for via a system, method and computer program product. The playout unit receives samples from a computational unit, and the capture unit sends samples to the computational unit. A playout FIFO buffer operates in a playout time domain, and a capture FIFO buffer operates in a capture time domain. The computational unit is synchronized to a common clock. A first relationship is calculated between the common clock and a playout fifo buffer read pointer, and a second relationship is calculated between the common clock and a capture FIFO buffer write pointer. For each sample in the playout time domain a corresponding sample in the samples from said computational unit is found and sent to the playout FIFO buffer. For each sample in the common clock time domain the corresponding sample in the capture time domain is found and sent to the computational unit.

Abstract: A video teleconferencing directional microphone includes three microphone elements arranged coincidentally on a vertical axis. The three microphone elements are placed on a supporting surface so that a first microphone element is on the surface, and the second and third microphone elements are elevated above the supporting surface. The directional microphone also includes three filters, a summing node, and an equalizer, which are used to shape the directivity pattern of the directional microphone into an elevated toroid sensitivity pattern. The elevated toroid sensitivity pattern increases sensitivity in the direction of a sound source of interest, but reduces sensitivity to any sound waves generated by noise sources at other locations.

Abstract: A video teleconferencing directional microphone has two surfaces joined with an angle of 90° relative to each other, a first omni directional microphone element arranged adjacent to the intersection between the two surfaces. The ceiling microphone assembly also includes a second omni directional microphone element arranged at a predetermined distance (d) from both surfaces. A subtractor subtracts the output of the first microphone element from the output of the second microphone element, and the output of the subtractor is equalized by an equalizer (Heq) to generate an equalized output. The surfaces and subtractor generates a quarter toroid directivity pattern for the ceiling microphone assembly. The quarter toroid sensitivity pattern increases sensitivity in the direction of a sound source of interest, but reduces sensitivity to any sound waves generated by noise sources at other locations or reverberations.

Abstract: A video teleconferencing directional microphone includes two microphone elements arranged coincidentally on a vertical axis. The two microphone elements are placed on a supporting surface so that a first microphone element is on the surface, and the second microphone elements are elevated above the supporting surface. The directional microphone also includes filters, an adder assembly, and an equalizer, which are used to shape the directivity pattern of the directional microphone into a toroid sensitivity pattern. The toroid sensitivity pattern increases sensitivity in the direction of a sound source of interest, while simultaneously reduces sensitivity to any sound waves generated by noise sources from certain elevation angles.

Abstract: A method and system with means for preventing unauthorized monitoring of a local conference room in which a local conferencing system is located comprising generation of a deterministic sound signal, and loading the deterministic sound signal on a first loudspeaker connected to, or integrated in the conferencing system, detecting the deterministic signal by analyzing a microphone signal picked up by a microphone connected to, or integrated in the conferencing system, and transferring the conference system into a security mode, if the deterministic signal is not detected.

Abstract: An audio source tracking arrangement, integrated in or connected to a video conference system, for determining a position of a source creating a sound, including: at least an audio signal processing module configured to determine the position of the source creating the sound based on a plurality of audio signals originating from the source respectively captured by a plurality of microphones; and one or more microphone housings, respectively encapsulating at least one of the plurality of microphones, the one or more microphone housings including a cavity in which at least one of the plurality of microphones is localized, an aperture on a surface of the microphone housing, and a channel extending from the cavity to the aperture, wherein the channel and the cavity are dimensioned to form an acoustical amplifier with a frequency response having one or more high frequency peaks in a frequency band of the sound.

Abstract: The present invention discloses an inventive microphone assembly for desktop communication systems. It utilises the advantages of placing the microphone in a desktop conferencing system as close as possible to the tabletop surface, without exposing the microphone for unfavourable mechanical or acoustic influence. This is achieved by building it into the footing in front of system, in a mechanically controlled and robust way. In this way, the high frequency response can be controlled to optimise sound quality, and at the same time the microphone assembly can be configured as a flexible unit that easily can be re-used in other systems.

Abstract: The present invention relates to an audio communication system and method with improved acoustic characteristics. It combines the benefits from full band echo cancellers and sub-band echo cancellers, by merging the filter taps of sub-band filters into the respective full-band filter taps, which is being used to generate the inverted echo estimate in the echo canceller.

Abstract: A video teleconferencing directional microphone has two surfaces joined with an angle of 90° relative to each other, a first omni directional microphone element arranged adjacent to the intersection between the two surfaces. The ceiling microphone assembly also includes a second omni directional microphone element arranged at a predetermined distance (d) from both surfaces. A subtractor subtracts the output of the first microphone element from the output of the second microphone element, and the output of the subtractor is equalized by an equalizer (Heq) to generate an equalized output. The surfaces and subtractor generates a quarter toroid directivity pattern for the ceiling microphone assembly. The quarter toroid sensitivity pattern increases sensitivity in the direction of a sound source of interest, but reduces sensitivity to any sound waves generated by noise sources at other locations or reverberations.

Abstract: A video teleconferencing directional microphone includes three microphone elements arranged coincidentally on a vertical axis. The three microphone elements are placed on a supporting surface so that a first microphone element is on the surface, and the second and third microphone elements are elevated above the supporting surface. The directional microphone also includes three filters, a summing node, and an equalizer, which are used to shape the directivity pattern of the directional microphone into an elevated toroid sensitivity pattern. The elevated toroid sensitivity pattern increases sensitivity in the direction of a sound source of interest, but reduces sensitivity to any sound waves generated by noise sources at other locations.