111 results about "Net force" patented technology

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.

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.

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 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.

The present invention is to provide a snapping mechanism mounted in a compartment of a case of a PC comprising a second hook of a pivotal member installed within the compartment for being pushed by a second protrusion of an electronic device, while mounting the electronic device into the compartment, the pivotal member moves along a trough provided thereon from one position to another position and enables an elastic member of the snapping mechanism to pivot the pivotal member like a lever to urge a first hook thereof against a first protrusion of the electronic device with the elastic member compressed and generate a strong snapping force to fasten the electronic device within the compartment.

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 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.

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.

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.

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.