1626 results about "Resultant force" patented technology

An orthopedic bone plate system having a bone plate for placement adjacent one or more vertebral bodies. The system further includes a locking element including a compression member and a fixation member wherein the compression member includes an aperture and at least one deformable portion. A bone fastener is also included in the present system which includes a bone engaging portion and a stem portion. The stem is capable of being slidably received within the aperture of the compression member while the locking member is capable of being received within an aperture of the bone plate. As the compression member is brought into proximity of a vertebral body along the longitudinal axis of the bone fastener, an increasing force is exerted against the fixation member and translated to the bone plate. The resultant force is translated back through the fixation member to the compression member which causes the deformable portion of the compression member to clamp the bone fastener relative to the bone plate.

A system, a method and administration lines are provided for self-priming of a solution delivery system. The administration lines are arranged such that resultant forces acting on the lines create different forces applied on each lumen resulting in solution flowing in one of the lumen undergoing a higher isostatic pressure. The lumens forming the administration line may be formed from concentric tubings or formed from separate tubings extending varied lengths into the solution container. As a result, automatic priming of the administration line and the solution delivery system is provided.

The invention provides a method and a system for cooperatively tracking a target by an unmanned aerial vehicle cluster. The method comprises the following steps of: establishing a wireless communication network for the cooperatively operated unmanned aerial vehicle cluster, and detecting a tracked target by utilizing an onboard sensor; when an optional unmanned aerial vehicle in the unmanned aerial vehicle cluster detects the target, processing detection data of the optional unmanned aerial vehicle, and broadcasting processing information to the other unmanned aerial vehicles; acquiring relative distances and relative angles among each unmanned aerial vehicle, the tracked target and the rest unmanned aerial vehicles in the unmanned aerial vehicle cluster according to the processing information by each unmanned aerial vehicle in the other unmanned aerial vehicles; constructing an environmental space potential field by each unmanned aerial vehicle in the other unmanned aerial vehicles according to the relative distances and the relative angles among each unmanned aerial vehicle, the tracked target and the rest unmanned aerial vehicles in the unmanned aerial vehicle cluster by each unmanned aerial vehicle in the other unmanned aerial vehicles, and calculating a resultant force of the potential field; and when the resultant force of the potential field is smaller than a safety threshold, controlling the corresponding unmanned aerial vehicle to track the tracked target. According to the method provided by the embodiment of the invention, sensor information is shared by utilizing the unmanned aerial vehicle cluster, and the high efficiency and the instantaneity of the cooperative target tracking are guaranteed.

A finger supporting structure (F) includes a grip portion and a finger supporter (T) formed thereto. The grip portion is of an elongated bar shape and has adequate length and thickness for a hand to grasp. The grip portion is either all or part of a grasping member of an implement or all or part of a gripping member (G) having internal hole to receive the grasping member of an implement. The finger supporter (T) is a laterally extending projection rigidly formed, in one piece, on the grip portion. The finger supporter (T) is angled to be inclined with respect to the axis (X) of the grip portion in order that the resultant force of the muscles of the digits and hand can be generated and exerted to the optimal. The finger supporting structure (F) is embodied in the grasping members of various implements and thereby provides gripping parts (H) having finger supporter (T) of the implements.

The invention discloses a multi-robot formation method, belonging to the field of intelligent control. The method comprises the following steps of: controlling the whole formation motion trail by the leader motion trail, firstly, determining a kinematics model of the leader, and determining the direction of the motion of the leader according to a resultant force of a repulsive force and a gravitational force; creating a motion model of following the leader by the follower, following the leader by the follower according to certain distance and angle, and determining the motion trail of the follower according to a motion model created by the artificial potential field; introducing an AdHoc between the leader and the follower, creating information feedback, and ensuring that no loss occurs in the process of following the leader by the follower. With the method provided by the invention, a multi-robot system can successfully avoid obstacles in the process of finishing tasks to reach a target point, and also can keep initial order in the whole process, implement real-time order control on multiple robots and be more suitable for some occasions where multiple robots are needed for finishing tasks (such as transporting, rescuing and the like) synchronously.

A game device calculates a shift angle A based on a magnitude of a velocity vector S of a moving object MO and inclination information that indicates an inclination of a controller, calculates a direction D of the moving object on a slope based on a direction of the velocity vector S of the moving object and the shift angle A, calculates a first force vector P1 in the direction intersecting at right angles on the slope with the direction D of the moving object on the slope based on the inclination information, calculates a second force vector P2 based on a slope angle of the slope, calculates a resultant force vector PS by combining the first force vector P1 and the second force vector P2, updates the velocity vector S of the moving object based on the resultant force vector PS, and updates a position of the moving object MO based on the updated velocity vector.

The invention discloses a drilling column heave compensation device of a marine floating type drilling platform. A composite hydraulic cylinder is adopted as a heave compensation hydraulic cylinder in a crown block heave compensation device; the high-pressure hydraulic oil output by a hydraulic pump flows into a rodless cavity of an inner cylinder and a rod cavity of an outer cylinder of the composite compensation hydraulic cylinder by a compensation control valve to provide controllable additional force for a piston rod of the outer cylinder; and the resultant force of the force and the hydraulic force acted by the rodless cavity of the outer cylinder of the compensation hydraulic cylinder provides support force to a crown block. The direction and magnitude of the additional force are controlled according to the platform heave motion, and the compensation effect of a heave compensation system is improved. A control unit transmits a control command to the hydraulic system according to the motion speed of the platform in the vertical direction, wherein the motion speed is obtained by detection, drives a piston of the compensation hydraulic cylinder to push the crown block to move and compensates the heave motion of the platform so that the crown block, a traveling block and a large hook are in a static state in the vertical direction relative to the well bottom in the allowable range.

The present invention relates to the Internet tendering and bidding field, especially to an all process electronic tendering and bidding bid evaluation system and method. The system comprises an information publishing platform, a credit information collection subsystem, a basic information system, an information archive management subsystem, a tendering subsystem, a bidding subsystem, a bid opening subsystem, a remote coordination management subsystem, a remote nonlocal bid evaluation subsystem and a tendering and bidding supervision subsystem. The all process electronic tendering and bidding bid evaluation system and method can provide a special platform aiming at different users, 10 application systems cover three platforms of tendering and bidding transaction, administrative supervision and public service, systems are mutually associated and restricted to form whole resultant force and construct the new system of tendering and bidding management.

The invention discloses a calculation method for force feedback in a virtual system, which comprises the following steps: step 1: a virtual environment comprising a virtual space, a virtual object and a virtual tool is established, attributes of the virtual tool are set, and a point set model which includes a plurality of mass points and surrounds the virtual tool is constructed; step 2: the virtual tool and a force feedback device are bound, the motion states of the virtual tool and the virtual object in the virtual space are tracked, whether the virtual tool and the virtual object collide or not is judged, if yes, step 3 is implemented; the step 3: the line speeds and the motion speeds before and after the collision of all the collision mass points of the virtual tool during the collision are respectively calculated, and the received impact during the collision process is also calculated; step 4: the resultant forces and the resultant moments of forces of all the collision mass points of the virtual tool are calculated and sent to the force feedback device. The calculation method takes full account of the self-rotation features of a virtual surgical instrument and can be applied in a surface model or a body model adopted in the virtual surgery.

A steering column assembly includes an upper jacket and a lower jacket partially disposed within said upper jacket. A bushing is disposed between the upper jacket and the lower jacket. The upper jacket and the lower jacket are collapsible along a longitudinal axis in response to a collision event. A first roller mechanism and a second roller mechanism are mounted to the upper jacket near a forward end and a rearward end of the bushing respectively for engaging the lower jacket in rolling engagement. The first and second roller mechanisms resist a resultant force caused by a bending moment created by a transverse load applied to a distal end of the upper jacket to minimize an increase in a sliding frictional force between the bushing and the lower jacket.

The invention provides a cooperative landing method for multiple unmanned aerial vehicles. The method comprises the followings steps of: establishing an Ad Hoc communication network for multiple unmanned aerial vehicles; searching for the self position and landing landmark of each unmanned aerial vehicle by using an onboard sensor, and transmitting a data packet to the neighboring unmanned aerial vehicle in a broadcasting way on the basis of the Ad Hoc communication network, wherein the data packet comprises position information and state information; calculating relative distances and relative angles between each unmanned aerial vehicle and the landing mark as well as between the unmanned aerial vehicle and the neighboring unmanned aerial vehicle in combination with self information of the unmanned aerial vehicle according to the received data packet; and constructing an environmental space potential field, calculating the attraction Fatt of the landing mark and repulsive force Frep from the neighboring unmanned aerial vehicles, calculating potential field resultant force, building a kinematic model, and determining the movement track of each unmanned aerial vehicle. Due to the adoption of the cooperative landing method, onboard sensor information can be shared and controlled cooperatively when an unmanned helicopter cluster performs a task, the safety of cluster landing is ensured, and high adaptability and expandability are achieved.

A MEMS system comprises a first rotational actuator having a first drive mechanism configured to drive rotation of a first rotator about a first axis, a second rotational actuator having a second drive mechanism configured to drive rotation of a second rotator about a second axis, first and second flexible linkages, a first drive beam coupled to the first rotator and to the first flexible linkage, a second drive beam coupled to the second rotator and to the second flexible linkage, and one or more device mounts coupled to the first and second flexible linkages. The one or more device mounts are configured to provide distributed points of attachment of a device. The rotation of the first and second rotators causes the device mount to rotate or piston.

A longitudinal, transverse and vertical force integrated control optimization method for electric vehicles driven by hub belongs to that technical field of electric vehicle control. The object of theinvention is to adopt a layered cooperative control structure so as to solve the four shortcomings existing in the prior art control system of a longitudinal, lateral and vertical force integrated control optimization method of an electric vehicle driven by a hub. The invention brings the relationship between vehicle resultant force and four-wheel tire force into the vehicle body six-degree-of-freedom equation to obtain the expected values of vehicle kinematics control target longitudinal speed, lateral speed, vertical speed, pitch angle, roll angle and yaw angle, thereby optimizing the vehicle kinematics control target. The layered longitudinal, lateral and vertical force unified optimal distribution integrated control method eliminates the conflict between different chassis electronic control systems and enhances the complementarity, and comprehensively improves vehicle handling stability and vehicle driving posture, which is embodied in the improvement of vehicle road tracking performance, safety, maneuverability, stability and comfort.

The invention relates to a test device of a machine tool spindle, in particular to a machine tool spindle reliability test bed based on mixed loading of electro-hydraulic servo and a dynamometer, and aims to solve the problem that the conventional machine tool spindle reliability test device cannot truly simulate dynamic cutting force loading, static cutting force loading and cutting torque loading. The machine tool spindle reliability test bed mainly comprises a machine tool spindle supporting part, a torque loading part and a cutting force loading part, wherein the machine tool spindle supporting part is formed by combining a spindle box base plate (14) and an iron gasket (15); the torque loading part consists of a loading rod (12), an elastic diaphragm coupler (9) and the dynamometer (8), which are coaxially assembled; and the cutting force loading part employs two loading modes, namely a cutting resultant force loading mode and a cutting axial force and radial force separated loading mode. By performing reliability test for simulating true working conditions on the tested machine tool spindle, the failure of a product is stimulated and exposed, and practical basic data are provided for reliability growth and evaluation of the product.

Methods, systems, and computer readable media are used for analyzing a design. A finite element analysis (FEA) model and a correlated computational flow dynamics (CFD) model are defined. A parametric volume is defined with control points forming a mesh bounding a common design object of the models. Control points on the parametric volume are adjusted to develop a design deformation of the FEA model and the CFD model. An analysis loop is performed until a convergence is achieved. The analysis loop includes simulating the CFD model to develop resultant forces and simulating the FEA model with the resultant forces applied to develop resultant displacements. The analysis loop also includes deforming the CFD model and the FEA model to match the resultant displacements by adjusting control points on the parametric volume to generate a corresponding analysis deformation of the FEA model and the CFD model.

The invention relates to a longitudinal-transverse-vertical force cooperative control method of a distributed electrically driven vehicle. The method is implemented by a vehicle control system: 1) formulation of expected resultant force and moment; 2) optimal distribution of longitudinal, transverse and vertical forces of four wheels; 3) specific execution of the forces. The expected values of the resultant force and the moment of the whole vehicle are obtained by utilizing various information of the vehicle, an integrated tyre force optimization problem is formed by establishing a constraint condition and an objective function, and an optimization solution algorithm is designed for the problem, wherein the optimization algorithm comprises a constraint optimization method which adopts a barrier function method and a Newton method, and a feasible region planning method based on vehicle state continuity. The method does not need to implement different control strategies according to different work conditions of tyres, realizes unified optimal distribution and control of the longitudinal, transverse and vertical forces of the tyres, comprehensively improves the operation stability and the driving posture of the vehicle, and can be applied to driverless operation of vehicles in the future.