78 results about "Environmental force" patented technology

The invention relates generally to pyrimidines and triazines ultraviolet light absorbers containing a phenolic aromatic group(s) and a non-phenolic aromatic group(s) and the use thereof to protect against degradation by environmental forces, inclusive of ultraviolet light, actinic radiation, oxidation, moisture, atmospheric pollutants, and combinations thereof. The new class of pyrimidines and triazines includes two (one) non-phenolic aromatic groups with hydrocarbyl groups that are ortho to each other and one (two) resorcinol or substituted resorcinol group attached to a triazine or pyrimidine ring. The pyrimidines and triazines may be included in a polymeric structure. A method for stabilizing a material by incorporating the novel pyrimidines and triazines is also disclosed.

A modular floating support structure for a solar panel array, each array module including floatation elements, a framework comprising E-W frame members connected to and aligning the floatation elements as well as N-S frame members providing a base on which panel supports are installed, and coupling hardware for connecting array modules to adjoining modules in both the E-W direction and N-S direction. A wireway/walkway may be disposed between and connect two large array fields. A mooring and anchoring system secures the array to shore, distributes loads along large portions of the array, and prevents loads from being concentrated in small regions of the array, thereby preventing damage from environmental forces typically encountered in outdoor marine environments.

A floating terminal for offloading an LNG carrier vessel in the sea. The floating terminal of open frame construction is moored toward its front end with a rotatable mooring arrangement so that the terminal may weathervane in response to environmental forces. Marine thrusters are provided at the aft end of the terminal for swinging the terminal away from and back toward a line defined by the path toward the terminal of an approaching LNG carrier. Offloading equipment and heat exchangers are provided on a deck of the floating structure. When an LNG carrier vessel approaches the terminal, the thrusters swing the floating terminal away from the carrier vessel approach line while a hawser at the front end of the terminal pulls the vessel close to the terminal. The floating terminal swings back toward the carrier vessel in response to operating the marine thrusters in an opposite direction until the carrier vessel and floating terminal are side-by-side. The hawser continues to pull the carrier vessel forward with respect to the terminal until loading arms at the side of the terminal are aligned side-by-side with a manifold of the carrier vessel.

The invention discloses a self-adaptive robust control method for a nonlinear bilateral teleoperation system. For a communication time delay problem of the bilateral teleoperation system, by online estimating a non-power environmental parameter of a slave end via a radial basis function neural network model and transmitting the non-power environmental parameter back to a master end to reconstructan environmental force, the passivity of the teleoperation system as well as the balancing problems of stability and transparency is prevented. For problems of nonlinearity and uncertainty of the bilateral teleoperation system, a track generator, and a nonlinear self-adaptive robust controller based on a radial basis function neural network are respectively provided at the master and slave ends, and based on a Lyapunov theory, a self-adaptive rate for online adjusting a neural network parameter is designed, so that the system is guaranteed to have good asymptotic stability and convergence. Theself-adaptive robust control method can guarantee the global robust stability of the nonlinear bilateral teleoperation system well, implements the position tracking of a robot at the slave end, and provides a vivid force feedback for an operator.

This invention comprises a process for fabricating a micro mechanical structure in a sealed cavity having a multi-layer high stiffness cap. The high stiffness material used for the cap protects the underlying microstructure from destructive environmental forces inherent in the packaging process and from environmental damage.

Elastomeric pads are arranged radially around the main bearing which rotatably supports a mooring turret with respect to a vessel. The elastomeric pads act as radial springs to react the radial turret loads in the vessel and to compensate for ovaling of the vessel in response to sea environmental forces on the vessel. A radial spring assembly is provided which applies compressive load to the elastomeric pads when the vessel and turret move radially toward each other, but prevent tension from being applied to the pads when the vessel and turret move radially away from each other.

The invention provides a marine installation method of a deepwater jacket by using an air sac, wherein a jacket on which a plurality of air sac groups are vertically mounted on the upper part of the jacket is provided; an air charging/bleeding connecting pipe is further mounted on the jacket; one end of the air charging/bleeding connecting pipe is integrally connected with one air sac group through an air charging/bleeding hose; the other end of the air charging/bleeding connecting pipe is connected with a hydraulic control system which is mounted on the top of the jacket; in such a connection way, a buoyancy structure for increasing the net buoyancy of the jacket is formed. The marine installation method is characterized in that the diameter of a rod piece located in a wave sensitive region of the deepwater jacket is designed to the minimum value allowed in the fabrication of the jacket rod piece so that the environmental force born by the jacket is effectively reduced and the requirements for the rigidity of the jacket are fundamentally reduced, the jacket is capable of self-floating vertically after being put into water, the installation steps of the jacket are simplified, the construction period of the marine installation of the jacket is shortened, and the marine installation cost is reduced.

The invention discloses a multilateral adaptive sliding-mode control method for a nonlinear teleoperation system. Based on a radial basis function neural network, the method estimates the non-power environment parameters of slave environmental dynamics to transmit to a main end to perform main end environmental force reconstruction through a communication channel; for the nonlinear and various uncertainty problems of master-slave robots, the method respectively designs trajectory builders on the main and slave ends and a radial basis function neural network based nonlinear adaptive sliding-mode controller and also designs the online training adaptive rate of a nonlinear function including system modeling information, so that the stability and accurate position tracking performance of a system can be guaranteed; and for signal communication problems between multiple robots, the controlling force distribution of multiple slave robots can be realized by designing a collaborative force allocation algorithm, and therefore, the collaborative operation performance of the multiple robots on work tasks can be enhanced.

The invention includes steps: (1) using position finding system to measure position information of ship; (2) using A/D convertor converts position information obtained from step (1) to digital signal; digital signal passes filter, and the part of frequency less than frequency of waves is transferred to controller; (3) blur adaptive algorithm contained in controller fuzzifies received precise information; (4) control force signal generated by controller passing through D/A converter obtains analog signal, which is enhanced by amplifier and output to actuator; (5) actuator carries out execution according to instruction, and ship is moved to appointed position. The invention better counteracts effect on ship hull by coming environmental force (including wind, wave and stream etc. forces) in feedforward. Thus, ship is able to reach appointed position under minimal error and impulsion. Advantages are: lowering energy consumption, and increasing dynamic positioning precision.

The invention discloses a nonlinear teleoperation bilateral control method based on adaptive fuzzy inversion. According to the nonlinear teleoperation bilateral control method, a signal optimization function is designed at the slave end, thus a position signal transmitted by a master end through a communication channel is optimized, and a corresponding speed and acceleration signal is generated atthe slave end; through fuzz estimation of non-power environment parameters at the slave end and reconstitution of environmental force of the master end, transmission of the power signal at the communication channel is avoided, and the problem of balance of passivity, stability and transparency of a traditional teleoperation system is avoided; aiming at the problems of nonlinearity, model uncertainty and parameter uncertainty of a bilateral teleoperation system, a nonlinear controller based on inversion is provided by the invention, model information of a fuzzy system approximation system is adopted, the adaptive rate for on-line adjusting the fuzzy system parameters is designed based on a Lyapunov theory, and it is ensured that the system has the good stability and convergence.

A brace assembly for truss legs of offshore structures is provided with a reinforcing sleeve mounted on the brace member in the portion of the brace member most prone to buckling under the force of horizontal moment acting on the brace member. The reinforcing sleeve surrounds the critical area of the brace member and provides additional load bearing capacity to the brace member. The reinforcing sleeve is made from a non-corrosive material having physical characteristics suitable to withstand the environmental forces in the location. The reinforcing sleeve may be installed at the shipyard when the offshore structure is manufactured or mounted on the existing rig by an easy retrofit not requiring towing of the offshore structure to the shipyard.

An attachment device comprising a bolt, a toggle adapted to receive the bolt and a nut, wherein the nut is received by the toggle and adapted to exert a force on the toggle in order to mount an external device to a pole or similar structure. The toggle is configured such that gravitational force properly aligns the toggle during installation. The bolt, toggle and nut are arranged to form a structural connection that supports the load of the mounted device as well as external and/or environmental forces which may be exerted upon the structural connection.

The invention relates to a method for measuring external environmental force of a power positioning system. The method comprises the following steps: (1) mounting a hexahedral force sensor box on a ship, wherein force sensors on the front and rear surfaces of the force sensor box are used for measuring a signal used for correcting longitudinal environmental force of the ship in real time, and force sensors on the left and right surfaces of the force sensor box are used for measuring a signal used for correcting transverse environmental force of the ship in real time; (2) inputting the measurement values of the force sensors into an improved low-frequency ship motion model so as to finish the whole power positioning system. Compared with the prior art, the method has the purpose of finishing power positioning without specific devices for measuring wind, current, wave and the like.

A semi-submersible structure. The hull includes four columns that are supported by two pontoons. The columns support the topsides and the topsides structural framing serves as horizontal framing between the columns. A truss frame is attached to the columns. The truss frame preferably includes heave plates. The truss frame extends downward below the pontoons a sufficient distance in the water such that it minimizes motions caused by environmental forces. The hull section and the truss space frame are constructed separately and assembled together at the offshore site where the structure is used for drilling and/or production.

The Environmentally Protected Data Storage Container is a system comprising an environmentally protected box approximating the size of a shoebox of sufficient structural rigidity to withstand an underground environment. Within the box, a data storage interface with a connection to outside the box exists. The data storage interface provides an attachment point to a data storage device. The data storage device is protected from data loss due to destructive environmental forces. Furthermore, the system may contain specific thermal management, power management, and sensor devices.

The present invention provides a method and composition for producing composite fiberglass artificial geological rock formation facades that can be used for concealing car ramps. In particular, the method and composition of the present invention provides for the production of a semi-unitary artificial geological rock formation facade that is uniquely lightweight, extraordinarily strong and durable, resistant to environmental forces and that has realistic natural rock characteristics, such as texture, sheen and coloration. The composition is comprised of a particular mixture of fiberglass, polyester resin, cabosil dust, ceramic dust and catalyst for curing.

The invention provides an optical waveguide plate and optical fiber coupling connection method an optical waveguide plate and a communication transmission system, which belongs to a communication system. The optical waveguide plate is processed to form a connection groove. The bottom of the groove comprises the core layer of optical waveguide. An optical fiber connection end is embedded into the connection groove, and an optical fiber core layer and the optical waveguide core layer are in butt joint. Compared with the prior art, the connection method, the optical waveguide plate and the communication transmission system have the advantages that the method that a guide pin is inserted into grooves on both sides of an optical waveguide plate core layer to realize the butt joint of the optical fiber core layer and the optical waveguide core layer is eliminated; the optical waveguide plate is processed to form the connection groove; the groove directly accommodates the optical fiber connection end, so that the optical fiber core layer and the optical waveguide plate core layer are in direct butt joint; accurate alignment and connection are realized; the impact of vibration, collision and other environmental forces is avoided; the alignment accuracy of the optical fiber core layer and the optical waveguide plate core layer is improved; the transmission stability of communication transmission is improved; the optical fiber connection end does not need a guide pin; the optical fiber connection end is simply processed; and the core competitiveness of a product is improved.

A dynamic scaling planning method for a floating base and a mechanical arm in a neutral buoyancy test comprises the following steps of I, setting a trajectory of an executor at the tail end of the mechanical arm in a pond coordinate system, inserting a path point sequence in the trajectory, and dividing the trajectory into n sections for execution; II, establishing n third-order polynomial equations, and calculating path points into a corresponding joint variable q(t); III, solving a calibration factor; and IV, solving the recalibrated mechanical arm, and respectively solving dynamic scaling of the trajectory in each section of joint space trajectory through the same rule to form a plurality of new trajectories. According to the dynamic scaling planning method for the floating base and the mechanical arm in the neutral buoyancy test, through dynamic time calibration for the motion trajectory, new joint angular speed and angular acceleration of the mechanical arm are formed, thus, inertia forces and environmental forces of the mechanical arm are changed so that the stability of positions and postures of the base is realized by the planning method which cannot keep the stability of positions and postures of the base originally.

The invention discloses a highly-dynamic carrier environmental force measurement apparatus comprising an axial accelerometer 1, an axial accelerometer 2, a transverse normal accelerometer 1, a transverse normal accelerometer 2, a transverse normal accelerometer 3, a transverse normal accelerometer 4, an axial gyroscope 1, an axial gyroscope 2, a transverse normal gyroscope 1, a transverse normal gyroscope 2, a transverse normal gyroscope 3, a transverse normal gyroscope 4, an axial magnetometer 1, an axial magnetometer 2, a transverse normal magnetometer 1, a transverse normal magnetometer 2, a transverse normal magnetometer 3, a transverse normal magnetometer 4, a signal conditioning module, a data acquisition module, a data processing module, a data storage module, a human-computer interaction module and a power supply module. The apparatus of the invention can overcome disadvantages that traditional environmental force measurement apparatuses can not adapt to the above conditions, and has advantages of a simple structure, a fast starting speed, low power dissipation, a small volume, strong stability and high measurement precision.

More specifically, the crash indication system for a child safety seat includes a seat bottom (12). A base (14) is provided for supporting the seat bottom, which is slidably connected to the bases so that the seat body (10) is movable relative to the base (14), between a resting position and a ride down position, a position due to a change in environmental forces. The seat body (10) is adjustably affixed to a carriage (48) to set a recline position. An indicator member (46) is attached to the carriage and moves therewith to visually track and monitor the movement of the seat. When ride down of the seat occurs due to a change in forces to the seat, the indicator member moves with the sliding carriage to reflect a ride down position of the seat bottom. A ratchet connection is provided to prevent the carriage from going back to its resting position.