4086 results about "Air cushion" patented technology

The invention discloses a floating type photovoltaic platform device capable of actively adjusting the angle of a photovoltaic module, which comprises floating bodies, a photovoltaic mechanism, a central control system, connecting floating bodies and gravity anchors, and is characterized in that the photovoltaic mechanism is mounted on the floating bodies, the floating bodies are connected with the gravity anchors, the gravity anchors are placed in a water area, the plurality of floating bodies are connected through the connecting floating bodies, and the central control system is connected with the central control system. The central control system is installed on the connecting floating body, the central control system is respectively connected with the floating body and the photovoltaic mechanism, the floating body comprises an adjusting air cushion and a supporting floating body, the adjusting air cushion is arranged on the supporting floating body, the photovoltaic mechanism is arranged on the adjusting air cushion, and the supporting floating body is respectively connected with the connecting floating body and the gravity anchor. The sun position and the illumination intensity are monitored in real time through the central control system, the angle of the photovoltaic mechanism is actively adjusted through the adjusting air cushion, it is ensured that the photovoltaic assembly can receive sunlight at the optimal angle all the time, and therefore the photoelectric conversion efficiency is remarkably improved.

The invention relates to the technical field of wharf loading and unloading, and discloses a bulk grain wharf ship loading and unloading dual-purpose machine which comprises a conveyor main body and a frame, a discharging hopper is fixedly connected to the top of the conveyor main body, the bottom of the conveyor main body is rotationally connected with the outer wall of the frame, and a supporting frame is rotationally connected to the bottom of the conveyor main body; when a ship needs to be unloaded, a conveying pipeline enters a cabin through a moving assembly, then when a first motor is started to enable a rotating rod to rotate, a connecting rod can be driven to rotate, a concave-convex ring rotates, an extrusion pushing assembly ascends and extrudes gas, and finally high-pressure gas is sprayed out towards grain particles and permeates into gaps of the grain particles to form an air cushion effect; the friction force among grain particles is reduced, the mobility of the grain particles is enhanced, the grains are conveniently conveyed by the spiral auger, the situation that the grains are accumulated at the bottom of the spiral auger due to poor mobility of the grain particles, the grains are extruded and are prone to being damaged is effectively prevented, and the integrity of the grain particles is ensured.

The invention discloses a fused quartz plate welding machine with a clamping effect, and relates to the technical field of fused quartz plate welding, the fused quartz plate welding machine comprises a threaded sleeve plate, and a fillet pressing plate is arranged on one side of the threaded sleeve plate; according to the fused quartz plate welding machine with the clamping effect, the hollow air cushion is arranged to be a square rubber body which is internally provided with a hollow area and provided with filleted corners, and a hollow cylinder is fixedly connected to the inner wall of the hollow air cushion, and the hollow air cushion is arranged on one side of the filleted corner pressing plate to make elastic contact with a fused quartz plate; the pre-tightening force is adjusted to be proper force for clamping the fused quartz plate by compressing the reset spring, so that the surface of the fused quartz plate is prevented from being affected by the material of the quartz plate and being easily impressed or even damaged when the quartz plate is rigidly clamped; and the situation that when the fused quartz plate is directly clamped by the fillet pressing plate, the force is difficult to control, excessive clamping is likely to happen, and the fused quartz plate is damaged is prevented.

The invention provides a new class of transportation with a partially aerostatically supported ram air cushion ship (PASRACS) that can provide safe, fast, efficient global transport services with extraordinary comfort, luxury and amenities. The PASRACS employs inventive synergistic combinations of lift from aerostatic, aerodynamic, hydrostatic and hydrodynamic forces for different modes of operation ranging from a stationary floating configuration on a water surface, to flight in ground effect at high speed. A propulsion system can utilize hydrogen as an energy source driving fluid-dynamic thrusters, to enable zero carbon emissions operations. A transition method is provided for a PASRACS to transition from a floating mode to a takeoff mode to a flight in ground-effect mode in an inventive optimized manner. A transport method for multimodally transporting payload is provided with PASRACS vehicles and systems, with quick turn time operations enabled by the use of payload transfer transport modules and transfer vehicles.

The invention relates to the field of gas-water separation, in particular to a gas-water separation device which comprises a separation device body, a gas-water input pipe is arranged at the bottom of the side end of the body, a horizontal cavity is formed in the body, a plurality of dehumidification air cushions arranged side by side are arranged in the horizontal cavity, and horizontal filtering baffles are fixedly installed at the lower ends of the dehumidification air cushions. The gas-water separator combines a baffle type and a centrifugal type for gas-water separation, so that the separation efficiency is greatly improved. And through cooperative control of the humidity sensor and the temperature sensor, accurate gas-water separation management is realized. The humidity control part ensures that gas enters a proper separation area by switching baffle plate paths, and the temperature control part heats through an electrothermal film and cools through a heat dissipation copper sheet, so that the gas-water separator always operates in an optimal temperature interval. In combination with a lag control mechanism, the system can effectively avoid frequent switching caused by environmental humidity fluctuation, reduce energy consumption, prolong the service life of equipment, and ensure long-term stable operation of the fuel cell system.

An air mattress and a production method of an air mattress are provided. The air mattress includes a first sheet and a second sheet, where the first sheet includes a first surface sheet; a periphery of the first surface sheet is provided with multiple first side sheets; the multiple first side sheets are integrally formed with the first surface sheet; adjacent side edges of each two adjacent first side sheets are connected, such that the multiple first side sheets are sequentially connected to form a first enclosing sheet; and the second sheet is connected to an end of the first enclosing sheet away from the first surface sheet.

The invention relates to the technical field of intelligent medical systems, medical instruments, monitoring equipment and the like, and provides a medical intelligent turning-over nursing system and a medical intelligent turning-over nursing pad. An intelligent air cushion module is arranged to monitor the pressure borne by each air bag on an air cushion in real time, and then a multi-parameter vital sign monitoring module is arranged to monitor the pressure borne by each air bag on the air cushion in real time; key vital sign data of a bedridden patient are collected in real time, then an air cushion host is arranged, and the inflation and deflation states of the corresponding air bags are controlled according to individual feature data and the key vital sign data of the bedridden patient and pressure data borne by different air bags so as to adjust the body stress of the bedridden patient on the air cushion. Therefore, the body stress condition and the vital signs of the patient are monitored in real time, a more comprehensive and personalized nursing strategy is provided in combination with the individual characteristics of different patients, and the nursing accuracy is improved.

A testing device and a testing method of a composite blade tilt rotor power assembly are related. The testing method includes the following steps: installing a tilt rotor flight power assembly on a flange platform of a testing device through a connector; confirming normal operation of an external power supply, the tilt rotor flight power assembly and a data acquisition computer; starting the tilt rotor flight power assembly, and controlling a tilt motor to rotate a cantilever shaft according to a tilt angle instruction; and recording the energy consumption and the tensile forces and torques in x, y and z directions of the tilt rotor flight power assembly by the data acquisition computer in real time. The testing method has the beneficial effects that the processes of starting, starting and stopping, hovering and descending can be simulated for the composite blade tilt rotor power assembly which is a core driving component of a vertical take-off and landing type electric driving hovercar, and the flight performance of the hovercar can be tested. The testing method can also be used for cold rotation test, take-off strategy verification test, hover strategy verification test, durability test and acceleration performance test of the composite blade tilt rotor power assembly.

The invention discloses a wearable small animal electrical stimulation device, and belongs to the technical field of medical instruments, the purpose of connection is achieved by plugging a wiring terminal into an electric plugging seat, a pressing ring extrudes a piston cylinder after being pressed, gas is guided into a gas cushion ring through a gas pipe, and the gas cushion ring is connected with the wiring terminal. The air cushion ring expands and drives a plurality of sealing rings to be embedded into a sealing groove outside the power connection socket, the purpose of sealing connection between the fixing sleeve and the power connection socket is achieved, the situation that water seepage and dust accumulation are caused by a gap between the fixing sleeve and the power connection socket is prevented, and the end of a clamping strip in the locking assembly can retract into a sliding way after being pressed, so that the sealing effect is improved. When the clamping strip moves to the clamping groove, the clamping strip can be clamped into the clamping groove through elastic support of the second spring, so that the purpose of locking the position of the electric socket is achieved, and the situation that the electric socket and the wiring terminal are loosened due to the fact that a small animal is subjected to stress reaction when being electrically stimulated and a wire is pulled is prevented; and the use stability and the experiment precision of the electrical stimulation device are ensured.

The invention relates to full-automatic air cushion foundation make-up filling equipment which is provided with a plurality of areas including a feeding area, a positioning area, a box opening area, a sponge supply area, a filling area, a ring supply area, a ring pressing area and a cover closing area. The air cushion box can be rotated to a set position through the visual positioning mechanism and the positioning carrying table in the positioning area, the follow-up box opening action of the box opening area is facilitated, automatic box opening of the air cushion box can be achieved through the box opening mechanism in the box opening area, sponge can be automatically conveyed into the air cushion box in the open state through the sponge supply mechanism in the sponge supply area, and the automatic box opening operation is achieved. The air cushion box containing sponge can be automatically filled through the filling mechanism in the filling area, plastic packaging rings can be conveyed to a target position through the plastic packaging ring feeding assembly in the ring supply area, automatic ring pressing can be achieved through the ring pressing mechanism in the ring pressing area, and automatic cover closing of the air cushion box can be achieved through the cover closing mechanism in the cover closing area. The equipment integrates a feeding area, a positioning area and other areas, and all the areas can achieve automatic operation.

The present invention discloses a device for a liquid-assisted sealed air cushion to support a rotor. The present invention utilizes the centrifugal force acting on the lift disc during rotation, and the liquid assists in sealing the air cushion, reducing the gas leakage amount. Compared with sealing forms such as carbon rings, the sealing effect is better and the cost is lower. Specifically, after the lift disc rotates, the liquid enters the liquid sealing cavity. Under the action of the centrifugal force of the liquid and the hindering effect of the liquid and the gas-blocking packing, the liquid assists in sealing the air cushion, which can reduce the gas leakage amount in the air cushion chamber. The present invention realizes the function of sealing the air cushion well at low cost.

The invention provides a preparation method of an Al-Mg-Mn-Sc series aluminum alloy plate. The preparation method comprises the following steps: S1, carrying out hot rolling on an Al-Mg-Mn-Sc series aluminum alloy cast ingot; s2, the hot-rolled aluminum alloy plate is pre-annealed and then cold-rolled for the first time; s3, carrying out intermediate annealing on the cold-rolled aluminum alloy plate, and then carrying out secondary cold rolling; and S4, the aluminum alloy plate obtained in the step S3 is subjected to air cushion furnace rapid annealing. The invention further provides application of the aluminum alloy plate prepared through the method. According to the preparation method of the Al-Mg-Mn-Sc series aluminum alloy plate, through accurate component regulation and control and process optimization, the strength of the aluminum alloy plate is improved, and the mechanical property of the aluminum alloy plate is not obviously reduced under the 280 DEG C brazing machining condition.

1. The name of this design product: Comb (air cushion). 2. Purpose of this design product: used for combing hair. 3. The key point of the design of this product lies in its shape. 4. The picture or photo that best illustrates the key points of the design: Design 1 Stereoscopic Drawing 1. 5. Designate Design 1 as the base design.

The invention provides a landing and life-saving system adaptive to a non-fully-coated single aircraft. The landing and life-saving system comprises a helmet for wearing, a flying suit connected with the aircraft and used for wearing, and a plurality of mechanical feet mounted on the aircraft, the helmet comprises a shell and a non-trigger air cushion arranged in the shell, and a visual window is arranged on the front side of the shell; the flying suit comprises a vest, a back air bag installed on the back of the vest, a thoracico-abdominal air bag installed on the front portion of the vest and a gas generator connected with the air bags through pipelines, the gas generator is installed on the vest or the aircraft, and a trigger switch for inflating the air bags is arranged on the gas generator. The mechanical foot comprises a supporting rod, a rotating rod and a mounting block, the mounting block is connected to the aircraft, one end of the rotating rod is rotationally connected with the mounting block or the aircraft, one end of the supporting rod is rotationally connected with the other end of the rotating rod, and the other end of the supporting rod serves as a supporting foot. The system is used for assisting normal flight landing of a manned flight non-coated single aircraft, and realizes forced landing and lifesaving.

The invention relates to the technical field of wear-resisting ball valves, in particular to a high-pressure floating type hard sealing wear-resisting ball valve and a using method. An adjusting assembly is installed on the inner wall of an assembling plate and used for driving a communicating plate to move on the inner wall of a clamping sleeve plate, and a sealing assembly is installed on a bearing table and used for protecting a ball body; one end of the auxiliary assembly is installed on the inner wall of the assembling plate, the other end of the auxiliary assembly is installed on one side of the communicating plate, and the monitoring assembly is installed on the inner wall of the ball body and used for monitoring the flow speed of water flow; according to the high-pressure floating type hard sealing wear-resisting ball valve and the using method, after the air cushion is expanded, the open groove in the communicating plate can be effectively sealed, so that sealing closing of the valve is achieved, direct contact between the ball body and the inner wall of a pipeline is avoided, friction is avoided, the friction problem between the ball body and the wall of the pipeline is fundamentally solved, and the service life of the ball body is prolonged. The wear-resistant effect of the ball body is improved, and the stability is better.

The utility model discloses a steel box girder hoisting fine adjustment device which comprises a base, a jack is fixedly arranged on the upper surface of the base, a supporting assembly is fixedly arranged at the upper end of an ejector rod of the jack, supporting arms are arranged on the two adjacent side walls of the base respectively, the supporting arms are in an L shape, and air cylinders are fixedly arranged on the upper portions of long arms of the supporting arms. A piston rod of the air cylinder penetrates through the long arm of the supporting arm and extends to the position above the short arm of the supporting arm, and the piston rod is higher than the air cushion supporting assembly. According to the fine adjustment device for hoisting the steel box girder, the jack is arranged to adjust the height of the steel box girder, the air cushion supporting device, the supporting arm and the air cylinder are arranged to adjust the position of the steel box girder in the horizontal direction, so that the steel box girder is installed at a preset installation position, the installation precision is high, and the operation is convenient and fast.

The embodiment of the invention provides a nurse station ward information collection method and system based on a wireless network. A flexible electronic skin network is integrated in a patient mattress, pressure and temperature data are captured through distributed piezoresistive units, a multi-modal thermodynamic diagram is generated, and data synchronization is achieved through a wireless ad hoc network protocol. And driving an air cushion bed actuator to perform gradient compensation according to a matching result of the pressure gradient track and the physiological parameters, transmitting a compressed hierarchical data packet to a nurse station gateway by adopting a remote wide area network protocol, reconstructing a three-dimensional pressure model and generating an early warning instruction. According to the technical scheme provided by the embodiment of the invention, the occurrence probability of health problems such as bedsore caused by long-time bed lying is remarkably reduced, and the nursing quality of the patient is improved.

The utility model discloses an inflatable life raft capable of turning over stably, and relates to the technical field of life rafts, the inflatable life raft capable of turning over stably comprises a life raft base and an annular enclosure air cushion installed on the surface of the top end of the life raft base, the annular enclosure air cushion is provided with an inlet, and the inlet is provided with an air inlet. An outer side air cushion is installed on the outer side surface of the life raft base, a pull rope is installed on the surface of one end of the outer side air cushion, a plurality of handle belts are installed on the outer side surface of the annular fence air cushion, and the surface of one end of the outer side air cushion is in movable contact with the surface of one end of the annular fence air cushion. People falling into the sea can conveniently enter the life raft base, meanwhile, overturning and shaking of the life raft base are reduced, the pull rope is matched with the handle belt, people falling into the sea can conveniently enter the life raft base from the entrance, and the life raft base is matched with the balance weight ball. The life raft base provides stable force in the overturning and shaking process, and the effect that a person is stabilized in advance on the life raft base is achieved.

The invention relates to the technical field of vibration tests, in particular to a ground resonance test suspension device and a test method. The ground resonance test suspension device is provided with a bearing frame body, a hoisting mechanism, a bearing mechanism and a suspension mechanism, the bearing frame body is composed of a bearing supporting column, a cross beam and a longitudinal beam, and the position of the cross beam can be adjusted; a bracket of the bearing mechanism is provided with a bottom beam, an auxiliary supporting beam and a supporting beam, and a flexible air cushion is arranged on the supporting beam. A flexible supporting unit of the suspension mechanism is provided with a main spring rope, an upper hanging scaffold, a lower hanging scaffold and an auxiliary spring rope, and an auxiliary spring rope connecting unit can control the state of the flexible supporting unit. The invention further provides a ground resonance test method which comprises the steps of suspension pretreatment, aircraft suspension and test, and the equivalent stiffness of the suspension mechanism can be adjusted. The aircraft suspension system can adapt to different aircraft sizes and weight distribution, and the equivalent stiffness of the whole suspension system can be adjusted to meet the test support frequency requirement.

The invention discloses an air cushion belt dynamic balance control system and a management and control method, and belongs to the field of air cushion belt conveyors. Original signals of a sensor are obtained, a Fluent noise filtering algorithm is used for eliminating airflow interference, synchronous tension and air pressure data are aligned through timestamps, a reliability model is used for filling temperature field missing values, and standardized data streams are formed; based on the standardized data flow, analyzing an air pressure gradient by means of a fluid mechanics equation, extracting abnormal vibration modal characteristics of the carrier roller, calculating a fluctuation coefficient in combination with tension simulation, and obtaining a multi-dimensional parameter set containing dynamic distribution of a pressure field and a belt deviation angle; inputting the multi-dimensional parameter set into the digital twin, updating the fatigue damage parameters of the belt through Fluent simulation driving, rendering the visualization result of the flow field of the air chamber in real time, and outputting a simulation result containing the dynamic cloud picture of the pressure field of the air chamber and the fatigue damage distribution of the belt; and calculating the pressure balance degree of the air chamber according to a simulation result.

The invention relates to the technical field of carbon fiber prepreg cloth production, and discloses a low-gram-weight yarn spreading device for carbon fiber prepreg cloth, which comprises a rack, and a modular yarn releasing unit, a hot roller yarn spreading unit and an airflow auxiliary yarn spreading unit which are arranged on the rack, the hot roller yarn spreading unit comprises at least three hot roller groups, the airflow auxiliary yarn spreading unit comprises an airflow nozzle assembly and an airflow buffer plate which are oppositely distributed up and down, the airflow nozzle assembly sprays airflow and is used for transversely pushing away fibers to assist yarn spreading, and the airflow buffer plate releases the airflow to form an air cushion to buffer yarn tension fluctuation. According to the low-gram-weight yarn spreading device for the carbon fiber prepreg cloth, the hot roller yarn spreading unit and the airflow auxiliary yarn spreading unit cooperate, efficient yarn spreading is achieved, meanwhile, the airflow buffer plate releases low-pressure airflow, an air cushion is formed, tension fluctuation is absorbed, and the yarn breaking rate is reduced.

The utility model discloses a movable underground tunneling supporting device, which belongs to the technical field of coal mine tunneling supporting devices and comprises supporting vertical plates oppositely arranged on two sides, the upper ends of the supporting vertical plates on the two sides are detachably connected with supporting semi-arc plates, and the bottoms of the supporting vertical plates on the two sides are detachably connected with universal wheels. Fixing assemblies are installed at the bottoms of the supporting vertical plates on the two sides, the supporting device is fixed to the original position through the fixing assemblies, inner concave faces are arranged on the outer walls of the supporting semi-arc plates on the two sides, semi-arc air cushions are detachably connected to the interiors of the inner concave faces on the two sides, air exists in the arranged semi-arc air cushions, the surfaces of the semi-arc air cushions are stressed and deformed when broken stones fall down, and therefore the broken stones are prevented from falling off. Large resilience force cannot be generated, impact force of broken stones can be buffered and then fall down towards the two sides, and therefore the situation that workers are injured due to the fact that the broken stones bounce up can be avoided.

The invention belongs to the technical field of aluminum-based materials, and particularly relates to a preparation method of a high-performance 1060-O-state aluminum alloy connecting piece. The preparation method comprises the following steps that firstly, a hot-rolled coil is prepared; step 2, preheating treatment; thirdly, a cold-rolled coil is prepared; fourthly, air cushion type continuous annealing is conducted; 5, annealing a finished product in the box-type furnace; and step 6, slitting a finished product. According to the method, the problems of low production efficiency, poor comprehensive performance and high energy consumption when the O-state aluminum alloy connecting piece is prepared by adopting a single box-type furnace annealing process are solved, high-efficiency, high-consistency and low-energy-consumption production is realized, and the prepared connecting piece has stable low strength and high ductility and is suitable for large-scale production. And the application requirements of new energy automobiles and energy storage battery modules can be met.

The amphibious transport plane based on the ground effect comprises a plane body, a main wing and a vertical empennage, the main wing is located behind the gravity center of the plane body, a pair of forward-swept front wings are further arranged in front of the gravity center of the plane body, and the vertical empennage is arranged on the main wing; a first propeller is arranged on each of the left and right sides of the head of the fuselage; a pair of second propellers is arranged at the front end of the main wing; a fault step is arranged in the middle of the fuselage. The aircraft has the beneficial effects that the aircraft obtains a great lift-drag ratio in a ground effect area by utilizing the ground effect, the aircraft is lifted up through an airflow air cushion, and the airflow angle of the engine is accurately controlled by utilizing a popular engine tilting technology, so that the aircraft is prevented from falling off. Therefore, low-oil-consumption, large-load, short-distance take-off and low-speed landing are achieved, and the take-off and landing performance of the seaplane is greatly improved.

The embodiment of the invention relates to a compressed air energy storage chamber construction method which comprises the steps that a basic chamber is obtained, an air cushion is placed at an inlet of the chamber, the air cushion is of a double-layer structure, an air injection space is formed between the inner layer and the outer layer of the air cushion, and an air storage space is formed in the inner layer of the air cushion; injecting air into the air injection space to enable the air cushion to reach a preset size; and concrete is injected into an annular space between the foundation chamber and the air cushion. Through the arrangement, the compressed air in the air storage space is subjected to heat insulation and heat preservation by the air in the air injection space, the influence of the temperature change of the compressed air on surrounding rock in the compression stage and the release stage of the compressed air is reduced, the damage to the surrounding rock is reduced, and the energy storage efficiency of the compressed air energy storage chamber is guaranteed. The concrete serves as a supporting structure of the compressed air energy storage chamber, stability is improved, steel linings do not need to be erected, the construction process is simple, construction efficiency is improved, manufacturing cost is low, and construction cost is reduced.

An electronic device may include a display having a waveguide that propagates image light and having optics such as a tint layer or bias lens mounted to the waveguide by a ring of adhesive. The ring may laterally surround an air cavity between the optics and the waveguide. A surface relief grating may be mounted to the waveguide within the air cavity. One or more air flow channels may be provided in the ring of adhesive and / or the optics to constrain air flow out of the air cavity on the time scale of a drop or impact event. This may configure the air cavity to maintain its volume during the event, effectively forming an air cushion for components in the air cavity. The air flow channels may pass air between the air cavity and the environment on the time scale of environmental ambient pressure changes.

The invention provides an immersed tube joint air cushion suspension device and a control method thereof, and belongs to the field of immersed tube transportation. The immersed tube section air cushion suspension device is divided into the air cushion suspension unit, the partition control unit, the communication unit and the central control unit, and intelligent air cushion suspension transportation of immersed tube sections is achieved; through the method, the suspension height and speed of each subarea and the transportation angle of the whole immersed tube joint can be intelligently controlled, and in the transportation process of the immersed tube joint, the method has the advantages that friction force and ground vibration are reduced, carrying is efficient, control is accurate, the method adapts to various terrains, damage to the ground is reduced, and the method is environmentally friendly and safe.

A device (1) for manufacturing a cable harness comprises a presentation plate (2) on which cables (4) of the cable harness can be arranged on a front surface of the presentation plate, and handling elements (5, 5', 5") for handling the cables (4) of the cable harness. The handling elements (5, 5', 5") are magnetically attached to the presentation plate (2). The device (1) includes a pneumatic system with which an air cushion can be generated between the handling element (5, 5', 5") and the presentation plate (2), which is designed as a perforated plate. The handling elements (5, 5', 5") each comprise a front handling part (7) and a rear traversing part (8).

A breathable cushion in accordance with the present disclosure includes a frame arranged inside a cover. The frame includes an outer rim, an inner rim spaced apart from the outer rim, and a lattice extending between the outer rim and the inner rim and defining an internal void of the frame. Apertures are formed through the lattice of the frame. The apertures and internal void allow airflow through the frame.

A motion simulator system is disclosed that includes a freely rotatable movable frame supported by, but unattached to, a hemispherical base. The movable frame comprises a spherical enclosure constructed from rigid, lightweight materials such as composite materials or interlocking panels, providing unlimited 360-degree rotation in all three rotational degrees of freedom (pitch, roll, and yaw). An internal actuator system coupled to the movable frame controls attitude positioning while the center of rotation remains substantially fixed relative to the base. Low friction engagement between the movable frame and base is achieved through transfer bearings integrated into the base's outer surface or by pressure-vented air cushions. The system enables smooth, continuous rotation of the untethered movable frame for enhanced motion simulation applications.