111 results about "Net force" patented technology

A touch control method is implemented in an electronic system. A calculation of the product of a pressure value and the area over which pressure is applied are included in touch input data packets representing a touch operation, the values of net force associated with the touch input packets are thus obtained. A signal of a short press, if recognized, with a value of net force greater than a net force threshold can be recognized as a signal of a long press, thus simulating an operation of long press and triggering the selection of an object, where the selection of the object would otherwise require a long press operation. The touch control method operates to significantly speed up selection of an object.

A head stabilizing system is provided. The head stabilizing system is intended to minimize loads on the head and the neck, some of which may be injurious or even fatal, by generating a reaction force that substantially opposes a force acting on the head and generated by rapid deceleration of a vehicle or a crash impact. The head stabilizing system includes a helmet, a connection structure, and at least one resisting member. The resisting member generates a reaction force that opposes the crash impact force, yielding a reduced net force on the head. This reaction force can be generated as a function of position, velocity or acceleration. The resisting member may include a tether, a dashpot, or a dashpot containing a controllable rheological fluid. The viscosity of the controllable rheological fluid can be automatically adjusted in response to changes in status of a vehicle or it's occupant.

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.

In an unified control of a plurality of active chassis systems a role of each chassis system in applying a corrective net force and a corrective moment to a vehicle is determined. In determining the roles, control influence coefficients and a control authority of each active chassis system is determined. An activation status of each active chassis system based on the control influence coefficients and the control authority is subsequently determined.

A control device for a legged mobile robot, in which a correction manipulated variable of a desired floor reaction force (desired floor reaction force's moment) is subsequently determined based on an error between an actual state quantity, such as a body posture angle, of the robot 1 and a desired state quantity of the same, and at the same time, a desired movement of the robot 1 is subsequently determined by the use of the correction manipulated variable and a dynamic model. At this time, a friction force component, which defines a frictional force between the robot 1 and a floor such as a translation floor reaction force's horizontal component, is set as a variable to be limited, and an allowable range of the variable to be limited is set. The desired movement is determined so that the variable to be limited remains within the allowable range and a resultant force of an inertial force and gravity, generated by the movement of the robot 1 on the dynamic model, balances with a floor reaction force obtained by correcting the desired floor reaction force by the correction manipulated variable. The desired movement is determined by adjusting a plurality of movement modes having mutually different generation ratios of a floor reaction force's moment and a translation floor reaction force.

An electric wheelchair includes a body portion, an operating section to detect an operation by an operator, an obstacle sensor to detect an obstacle existing in the vicinity of the body portion, an obstacle determination section to form a search region extending from the body portion in an operating direction, and to determine an obstacle existing in the search region, as the obstacle to be avoided, a virtual repulsive force calculation section to calculate a virtual repulsive force to move the body portion away from the obstacle determined by the obstacle determination section, a resultant force calculation section to calculate a resultant force composed of an operating force and the virtual repulsive force, and a control section to control a movement of the body portion so that the body portion is moved in a direction of the resultant force.

A computer programmable system and program product for controlling vibrations is provided. The computer programmable system and program product include first program instructions for actively driving a first imbalance mass concentration rotor and a second imbalance mass concentration rotor at a vibration canceling rotation frequency while controlling the rotational position of the first imbalance mass concentration and the second imbalance mass concentration to produce a rotating net force vector to inhibit periodic vibrations. The computer programmable system and program product include second program instructions to opposingly orient the first imbalance mass concentration relative to the second imbalance mass concentration during a starting stopping rotation speed less than the vibration canceling rotation frequency. The system and product preferably include a fault mode control protocol for controlling a rotation of the rotors during a sensed failure of the rotating assembly vibration control system.

A head stabilizing system is provided. The head stabilizing system is intended to minimize loads on the head and the neck, some of which may be injurious or even fatal, by generating a reaction force that substantially opposes a force acting on the head and generated by rapid deceleration of a vehicle or a crash impact. The head stabilizing system includes a helmet, a connection structure, and at least one resisting member. A mounting element is provided to be mounted onto the helmet to connect to the at least one resisting member. The mounting element is preferably attached to the helmet by an adhesive. The resisting member generates a reaction force that opposes the crash impact force, yielding a reduced net force on the head. This reaction force can be generated as a function of position, velocity or acceleration. The resisting member may include a tether, a dashpot, or a dashpot containing a controllable rheological fluid. The viscosity of the controllable rheological fluid can be automatically adjusted in response to changes in status of a vehicle or it's occupant.

A method of increasing efficiency and avoiding or reducing potential stall conditions is accomplished by configuring a ripper of a track type tractor responsive to a net force vector acting on the ripper. The net force vector is indicative of the various forces and pressures acting on the ripper, and the values indicative of these forces can be sensed. For instance, the force and value indicative of the force magnitude can be sensed by monitoring driveline torque, whereas the force vector angle can be derived from ripper tilt and lift actuator pressures. The ripper is configured responsive to the force vector magnitude and direction either via a control algorithm, or by inputs generated by an operator.

In an unified control of a plurality of active chassis systems a role of each chassis system in applying a corrective net force and a corrective moment to a vehicle is determined. In determining the roles, control influence coefficients and a control authority of each active chassis system is determined. An activation status of each active chassis system based on the control influence coefficients and the control authority is subsequently determined.

A method for estimation of the maximum grip coefficient on the basis of knowledge of the forces and the self-alignment torque which are generated in the contact area of a tire, includes the steps of:selecting a plurality of fixed points in space, which lie at different azimuths along the circumference in at least one sidewall of the tire,carrying out a corresponding number of measurements of circumferential distance variation (extension or contraction) at these fixed points when the tire is rolling on the road,processing the measurement signals so as to extract the three components of a resultant of forces which are exerted by the road on the contact area of a tire and the self-alignment torque generated by the tire from them,processing the evaluation signals of the three components of a resultant of forces which are exerted by the road on the contact area of a tire and of the self-alignment torque generated by the tire so as to extract the said grip coefficient μ from them.

A target resultant force to be applied to a vehicle body is calculated, the magnitude of a critical friction circle of each wheel is estimated, and a critical resultant force is estimated from the estimated magnitude of the critical friction circle. Subsequently, a ratio of the target resultant force to a critical resultant force is set as an effective road friction, and the magnitude of a tire force is set by using the magnitude of the critical friction circle and the effective road friction. The direction of the tire force of each wheel to be controlled is set based on the sum of products, which are calculated for all other wheels, of a distance from the position of the wheel to be controlled to the position of the other wheel in a direction of the resultant force, and the magnitude of the tire force of the other wheel. Cooperative control of steering and braking or steering and driving of each wheel to be controlled is performed based on the magnitude and direction of the tire force which have been set.

The invention provides a limited filling retaining wall earth pressure distribution calculation method. According to the method, the earth pressure distribution is not artificially assumed to be linear, and the method is an expansion and supplement to the Coulomb theory; a rigid limited filling retaining wall is set as an object, the slip surface of the wall is still assumed to be a plane on the basis of the Coulomb theory and a wedge element method, and the action points and action distribution forms and degree of the active earth pressure of the slip surface in general conditions are calculated. The limited filling retaining wall earth pressure distribution calculation method can accurately calculate the resultant force and positions of reasonable action points of the earth pressure behind the retaining wall and grasp the nonlinear distribution of the earth pressure along the back of the wall for carrying out scientific and reasonable design and construction, thereby having important practical significance on scientific and reasonable guidance for the design of the retaining wall.

A method of increasing efficiency and avoiding or reducing potential stall conditions is accomplished by configuring a ripper of a track type tractor responsive to a net force vector acting on the ripper. The net force vector is indicative of the various forces and pressures acting on the ripper, and the values indicative of these forces can be sensed. For instance, the force and value indicative of the force magnitude can be sensed by monitoring driveline torque, whereas the force vector angle can be derived from ripper tilt and lift actuator pressures. The ripper is configured responsive to the force vector magnitude and direction either via a control algorithm, or by inputs generated by an operator.

The invention discloses a zero (micro) gravity suspension method and device with a zero-frequency vibration isolation characteristic and relates to the technical field of zero gravity or micro gravity environmental simulation in the outer space. The problems of space ground simulation, low-frequency and ultralow frequency vibration isolation and the like are solved. The series of suspension devices can be each substantially seen as being formed by connecting a vertical spring and a vertical spring which support gravity support through a connecting rod and a suspended object. According to the basic principle, support force which is equal to the magnitude of the gravity and opposite to the direction of the gravity is provided through geometric nonlinearity arrangement of a spring connecting rod mechanism, so that the resultant force acted on the suspended object within the device design range is zero, and thus the suspended object is in the suspension state. The zero (micro) gravity suspension device can be used for space zero and micro gravity environments including ground simulation experiments such as spacecraft docking, large space flexible structure dynamics performance tests and astronaut training. Through the suspension characteristics of the zero (micro) gravity suspension method device, the problems of low-frequency and ultralow frequency vibration isolation can be solved effectively, and the defect that through a traditional vibration isolation theory, system resonance is difficult to be avoided is overcome.

The invention relates to an infinite space standard vector force calibration device which is used for calibrating the six component forces of a six-component measurement bench of an aero-engine and can be used for calibrating the three component forces of a three-component sensor. The device comprises a gantry frame (1), and three calibration components for generating calibration forces are installed on the gantry frame (1). In the process of calibration, the loading force of a hydraulic loading oil cylinder (4) in a single calibration component can be compared with the calibration force generated by a single-component sensor for calibration on an engine test bench, or, the resultant force of the loading forces of the hydraulic loading oil cylinders (4) in multiple calibration components can be compared with the resultant force measured for calibration on the engine test bench. The influence of unit calibration on the component forces of a measurement system is avoided. The accuracy of measured values of the component forces of the vector engine test bench is improved greatly. Accurate measurement data can be provided for the magnitude, direction and action point of the vector force of a thrust-vectoring engine. An experiment basis can be provided for the study of a thrust-vectoring engine.

The invention relates to the technical field of medical robots, in particular to a mechanical arm anti-collision method and system and a medical robot. The mechanical arm anti-collision method comprises the steps that discrete points are arranged on mechanical arms, according to the calculated relative distance between the discrete points on different mechanical arms, the mutual acting force borneby each discrete point is obtained so as to obtain resultant force of the mutual acting force borne by the discrete points, the decare acting force borne by each mechanical arm is obtained, an operator can sense the decare acting force in real time, and therefore the risk that mechanical arms are likely to interfere and collide with each other is effectively lowered.

A method for producing thrusts in devices where a “Mach” effect mass fluctuation is driven by applying a high voltage, high frequency electrical signal to capacitive circuit elements made with high dielectric constant core material and at the same time applying a current signal of the same frequency to inductive circuit elements arranged so that the magnetic fields produced thereby thread the capacitors perpendicular to the electric fields between their plates. With appropriate relative phase established between the electric and magnetic fields in the dielectric material between the plates of the capacitor, the Lorentz force acting on the lattice ions in the dielectric yields a net force. That net force is a consequence of the fact that in each cycle when the Lorentz force acts in one direction the effective masses of the ions are different from their effective masses in the parts of each cycle where lattice forces act to restore the initial configuration. Operated at sufficiently high frequencies and powers, such devices can produce useful levels of thrust.

The invention relates to an anchoring device of a screw pump, comprising a clamping sleeve, a slip tooth, a central pipe and a righting block, wherein the central pipe is connected with a cone joint, a body and a lower joint, the righting block is provided with a righting spring, and a sleeve provided with a positioning pin bolt is matched with a track groove on the central pipe. The anchoring device of the screw pump also comprises a rotation preventing device, wherein the rotation preventing device comprises a radial anchoring mechanism and an axial anchoring mechanism. The axial anchoring mechanism is matched with the slip tooth by the cone joint, the radial anchoring mechanism is matched with the central pipe and a sleeve pipe by rotation preventing teeth which are matched with the righting block, uniformly distributed on the body and installed in a horizontal direction and is in interval distribution with the righting spring, and the section of a matching position of the central pipe is in a cam shape of which the middle is provided with a through hole. A rotation preventing function is added, right-angle anchoring linkage force generated by the anchoring device is combined with the torsional force of a sucker rod to enable axial and radial anchoring functions to be more steady, and the invention not only effectively inhibits superposition vibration during the running of a pump, but also has an up-and-down double-clamping safety function, thereby serious accidents caused by pump removal, pipe removal, identical-direction rotation and reverse rotation are fundamentally eliminated and prohibited, the economic benefit is enhanced, and the construction and the operation are convenient.

A magnetic recording disk drive achieves continuous contact recording with a head-suspension assembly that compensates for the moment generated from an adhesive force between the head carrier or slider and the disk. The slider pivot point, which is the point where the load force is applied to the flexure that supports the slider, is located closer to the front end of the slider than the net force applied by the air-bearing surface of the slider when the disk is rotating at its operational speed. This assures that the net air-bearing force generates a moment about the pivot point to partially counteract the flexure moment and the moment generated from the adhesive force between the disk and the slider's contact pad.

The invention provides an internal cable tension measuring device for a tension attenuation winch, which includes a tension pulley, a big bearing, a force-exerting sleeve, a force sensor, a sensor seat, a flange sleeve and a flat key. The internal cable tension measuring device is characterized in that as force is transversely exerted to the force sensor, the cable tension exerted on the tension pulley is exerted to the force sensor arranged in the flange sleeve along the resultant force direction under the action of the force-exerting sleeve, and suitable gaps are arranged between the flat key and the force-exerting sleeve as well as between the force-exerting sleeve and the flange sleeve, the sensor is free from the influence of the weight of the device, the precision of the stability of the tension measurement is ensured, and the device can be suitable to the variation of the cable wrap angle within a certain range.

The invention discloses an endpoint force feedback system and method applied to grinding industry robot operation. The endpoint force feedback system is connected with a mechanical arm by virtue of a flange and comprises a lower foundation support, an upper foundation support, an air spring, a guide device, a displacement sensor, a compression spring, a linear motion ball bearing, a proportional valve and an air compressor. The pressure in the air spring is controlled by virtue of the proportional valve, the combined force generated by the air spring and the compression spring is applied to the contact between a workpiece to be ground and a grinding tool, the contact force can be adjusted, the requirement on the position precision of an industrial robot during the grinding process can be lowered, the production cost can be reduced, and the product quality can be improved; moreover, the system is simple in structure, convenient to control and easy to popularize on a grinding production line.

The invention discloses a soft tissue deformation modeling method based on virtual springs. The soft tissue deformation modeling method based on virtual springs is based on the spring-particle model to establish an improved real-time deformation model of soft tissue, virtual body springs are added by the topological structure soft tissue surface model combining the square and the isosceles right triangle, so that a more real deformation effect is achieved; at the position of each particle in the system, the superposition of surface springs variable is equivalent to the surface deformation of an object, the resultant force of the elastic forces of the virtual springs is equivalent to the contact force on the surface of the object; the model inherits the advantages of the classical spring particle model that the principle is simple, the model is easy to establish, the calculation speed is quick, at the same time, the model has an ability to control the deformation area.

The invention discloses a force control joint device. The force control joint device comprises a base, elastic mechanism assemblies, a pneumatic muscle structure assembly, a displacement sensor assembly and an output end. The force control joint device is characterized in that the two symmetrically-arranged elastic mechanism assemblies output thrust, the pneumatic muscle structure assembly outputstensile force, and the resultant force of the thrust and the tensile force is used for controlling output force of a joint jointly. The displacement sensor assembly is used for monitoring the currentreal-time deformation quantity of the joint so as to facilitate subsequent data processing and real-time control over the output force of the joint. The force control joint device is used for controlling pressure, and through special structural design, when the joint carries a grinding tool head, under interference of the uneven work surface condition, the contact pressure of the grinding tool head and the surface of a workpiece can be kept to be constant.

Apparatus for Scanning Acoustic Microscopy (SAM) of a semiconductor device including a substrate with an acoustic probe, The substrate has upper and lower surfaces. A sealed lower space provides an environment surrounding the lower surface. An upper ring structure formed above the upper surface includes an upper sealing ring in contact with the upper surface, with the upper sealing structure and the seal forming a dam for retaining the acoustic transmission fluid above the upper surface. A fixture base retains a lower sealing ring in contact with the lower surface surrounding the lower surface. An acoustic scanning probe positioned confronting the upper surface of the semiconductor device extending into the acoustic transmission fluid retained in contact with the upper surface.

This invention relates to image contrast intensifying method, comprising the following steps: first, scanning a piece of image to sequentially calculate brightness variance of two adjacent pixels; then, comparing the variance to pre-setting threshold value, if large, generating a positive force sequence, if smaller, generating a negative force sequence; third, repeatedly operating the generation and accumulating calculation of the positive and negative ones to get a net positive force sequence and a net negative one until judging termination; fourth, forming a net force sequence by net positive one minus added-weight factor net negative one, and integrating and normalizing it to get a spreading force function; fifth, linear combining the spreading force function and original brightness switching function to get a new switching function for adjusting original brightness to intensify image contrast.

The invention discloses a high-precision modeling method for a Lorentz force of a large-gap electromagnetic actuator, and relates to the technical field of magnetic levitation control. The method is suitable for the electromagnetic actuator with the gap of more than 10mm. The method comprises the following steps of statically calibrating a test system through the electromagnetic actuator, and performing measurement to obtain equivalent magnetic field intensities of different positions; calculating a coefficient of a polynomial model by adopting a least square method based on the polynomial model, about position variables, of data and the equivalent magnetic field intensities obtained by measurement, and building the polynomial model of the equivalent magnetic field intensities; building an output force model of the electromagnetic actuator according to a Lorentz force principle; and calculating an equivalent resultant force action point position of the electromagnetic actuator by adopting a geometric method, and building an output moment model of the electromagnetic actuator based on the equivalent resultant force action point position and the output force model of the electromagnetic actuator. According to the method, high-precision control force and control moment output requirements of a space microgravity active vibration isolation control system can be met.

A pressure building regulator having a pressure receiving means in liquid communication with the liquid outlet passage, upon which a liquid in the liquid outlet passage can exert a balancing force, and a means for communicating the balancing force to the diaphragm opposing the backpressure force. The liquid pressure regulator typically employs a balancing piston which can transfer pressure fluctuations in the flow outlet into an equal and opposite force on the valve plug, and results in a net force of zero in the diaphragm plate. As a result, changes in the liquid pressure downstream of the valve plug only nominally, and typically negligibly, affect the upstream control of the liquid product.The invention also includes a pressure reducing regulator, configured with a balancing piston which can transfer pressure fluctuations in the flow outlet into an equal and opposite force on the valve plug, and results in a net force of zero in the diaphragm plate.The invention further provides a liquid pressure regulator having a differential diaphragm plate having a rigid structure, having a first side of a first surface area, and an opposed second side of a second surface area, where the first surface area and the second surface area are unequal. The differential diaphragm plate permits the use of conventional compressed air control regulators with the liquid pressure regulator to control a high pressure liquid system more accurately.