摘要:
A holonomic floating mobile object is operated under gravity and includes a main body and six or more thrusters for generating thrust by changing the momentum of a fluid. The six or more thrusters are controlled independently of one another such that the thrust is set at a desired value. The six or more thrusters are arranged in a fuselage coordinate system defined on the main body, such that the range in which a total thrust vector obtained by combining vectors of the thrust generated by all of the thrusters can be generated spans a six-dimensional space with three directions of translation and three directions of rotation. Incoming and outgoing flows to and from one of the thrusters are spaced apart from incoming and outgoing flows to and from the other thrusters and even apart from every other fuselage structure aside from that one thruster.
摘要:
A system for controlling a marine vessel having first and second steering nozzles and corresponding first and second reversing buckets, comprises a processor configured to receive a first vessel control signal including at least a component corresponding to a translational thrust command in a port direction, and that is configured to provide a set of actuator control signals coupled to and control the first and second reversing buckets. The processor is configured to provide the set of actuator control signals so as to maintain the first reversing bucket substantially in a first discrete position and the second reversing bucket substantially in a second discrete position as long as the first vessel control signal includes a component corresponding to a translational thrust command in the port direction.
摘要:
A method of producing a pulsatile jet flow from a substantially constant flow primary jet in a way that is mechanically efficient, easy to implement, and allows direct control over pulse duration and pulsing frequency is disclosed herein. The invention includes at least two components: (a) a constant flow fluid jet produced by any normal method (e.g., propeller) that can be directionally vectored fluidically, mechanically, or electromagnetically and (b) a nozzle with multiple outlets (orifices) through which the vectored jet may be directed. By alternately vectoring the jet through different outlets, a transient (pulsatile) flow at an outlet is obtained even with a substantially constant primary jet flow. Additionally, the nozzle outlets may be oriented in different directions to provide thrust vectoring, making the invention useful for maneuvering, directional control, etc.
摘要:
The invention relates to a thrust reverser (1) for the nacelle of a dual-flow turbine engine, in which the bypass means (4) and the actuation jacks (22) of the sliding cowling (2) and of the reverse flaps (20) are arranged in two substantially parallel planes arranged above one another in the radial direction of the nacelle. The invention also relates to a nacelle for a dual-flow turbine engine that comprises such a thrust reverser.
摘要:
A valve system intermediate a secondary flow path and a primary flow path to selectively communicate secondary airflow into the primary gas flow path and control airflow injected from a higher pressure plenum into a lower pressure flowpath.
摘要:
A nozzle assembly for a turbine engine has a convergent portion for converging fluid flow from a turbine engine core. A divergent portion for diverging fluid flow from the turbine engine core is in fluid communication with the convergent portion. A conduit is in communication with a bypass fluid flow. The conduit has a thrust vectoring port located near the divergent portion.
摘要:
A valve system intermediate a secondary flow path and a primary flow path to selectively communicate secondary airflow into the primary gas flow path and control airflow injected from a higher pressure plenum into a lower pressure flowpath.
摘要:
A method for controlling a marine vessel having a first steering nozzle, a reversing deflector and at least one of a bow thruster and a second steering nozzle is disclosed. The method comprises any of the acts of inducing a net transverse thrust to the marine vessel in response to a transverse thrust component signal, without substantially inducing any forward-reverse thrust or rotational thrust to the marine vessel, or inducing a net forward-reverse thrust to the marine vessel in response to a forward-reverse thrust component signal without substantially inducing any transverse thrust or rotational thrust to the marine vessel, or inducing a net rotational thrust to the marine vessel in response to the rotational thrust component signal without substantially inducing any forward-reverse thrust or transverse thrust to the marine vessel.
摘要:
A method for controlling a watercraft with a steering wheel, a steering device and twin motors, the method includes: maneuvering the watercraft at a first speed using side thrusters, controllable pitch propellers, or side thrusters with a deflection device as the steering device, wherein, when the watercraft travels in reverse and the watercraft makes a turn at the first speed, the steering wheel and the watercraft turn in a same direction, and maneuvering the watercraft at a second speed higher than the first speed using the controllable pitch propellers as the steering device, wherein, when the watercraft makes a turn at the second speed, a constant speed is maintained for both of the twin motors.
摘要:
A dynamic or aerodynamic fin comprising at least two parallel arranged fin sections. At least one fin section comprises a rotational axis for installing the fin section by a rotation shaft. An end stop is provided for stopping the rotational movement of the fin section to define an extreme position. In the extreme position the fin sections provide a substantially cambered shape to the fin. The dynamic fin is improved in that it comprises a pair of coupling elements. A first fin section is coupled to a second adjacent fin section by a pair of a first and second coupling elements. The first coupling element is complementary to the second coupling element. The first coupling element is part of, preferably integral, with the first fin section and the second coupling element is part of, preferably integral, with the second fin section.