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514 results about "Centripetal force" patented technology

A centripetal force (from Latin centrum, "center" and petere, "to seek") is a force that makes a body follow a curved path. Its direction is always orthogonal to the motion of the body and towards the fixed point of the instantaneous center of curvature of the path. Isaac Newton described it as "a force by which bodies are drawn or impelled, or in any way tend, towards a point as to a centre". In Newtonian mechanics, gravity provides the centripetal force responsible for astronomical orbits.

Vehicle body gesture control system for active suspension of vehicle

The invention discloses a vehicle body gesture control system for an active suspension of a vehicle. The vehicle body gesture control system comprises a sonar or laser sensor and four vehicle frame height sensors, wherein the sonar or laser sensor is mounted on a vehicle body, and the four vehicle frame height sensors are mounted on the left and right sides of the vehicle body; and rotation speed information of left and right vehicle wheels are respectively obtained through left and right ABS sensors, and a control unit is used for calculating the speed of the vehicle, whether to turn and turning radius information according to the rotation speed difference of the left and right vehicle wheels. An air suspension is adopted in the vehicle; and the control unit calculates the height of the vehicle according to factory rigidity parameters of the suspension and height information output by the height sensors, synthesizes weight, pavement information, height information, vehicle speed, a turning will of a driver and turning radius information and controls the left and right airbags release air so as to adjust a vehicle body gesture, so that the level of the vehicle body gesture during the straight driving on any pavement is guaranteed, or the vehicle body inclines by a certain degree during the turning on any pavement, a centripetal force required by the turning of the vehicle is provided, and the safety and comfort feel of the vehicle are improved.
Owner:SHANDONG UNIV OF SCI & TECH

Dynamics and kinematics estimation method for deep sea operation type ROV

The invention relates to the technical field of deep sea operation type ROVs, in particular to a dynamics and kinematics estimation method for a deep sea operation type ROV. The method comprises the steps of establishing a fixed coordinate system, a body coordinate system and a propeller coordinate system, and estimating a matrix for coordinate transform in six freedom degrees; estimating the mass matrix of the operation type ROV and a caused coriolis force and centripetal force matrix; estimating water power borne by the operation type ROV; estimating the static force borne by the operation type ROV; estimating the thrust of the operation type ROV; estimating unknown disturbance terms; determining the ultimate dynamic and kinematic model of the operation type ROV. According to the dynamics and kinematics estimation method for the deep sea operation type ROV, dynamic and kinematic modeling of the deep sea operation type ROV is carried out on the basis of dynamics, fluid mechanics, submarine maneuverability and other theories, aiming at complex mathematic models of underwater vehicles, the symmetry theory and the method of neglecting small magnitudes are utilized to simplify the mathematic models of the deep sea operation type ROV, and the established models can be used for estimating the stress situations of the ROV more accurately.
Owner:HARBIN ENG UNIV

Quadrifid insulated damping conductor spacer

The invention discloses a quadrifid insulated damping conductor spacer matched with a hot-line de-icing scheme of a transmission line, which is realized by frameworks and a line clamp main body, wherein the frameworks are made of glass fiber reinforced plastics, consist of lug boss type positioning stop blocks and are symmetrically arranged close to the inner side outside each connecting hole on the inner side of a rectangular framework, and the line clamp main body consists of a line clamp with a connecting joint. The quadrifid insulated damping conductor spacer not only can reliably separate and support a quadrifid conducting line, but also has good insulating effect so as to ensure that four conducting lines are mutually insulated, thereby creating necessary conditions for the hot-line de-icing of the transmission line, avoiding the harm brought by ice and snow disasters and increasing the bearing strength of the conductor spacer. Because of the improvement on a positioning structure, the line clamp main body and a rubber block, the centripetal force of the conductor spacer can be increased at the same time of simplifying the structure so as to ensure that a damping joint moves along the conducting line all the time and guarantee that the conducting line has damping effect and good positioning when being moved within any possible ranges. The quadrifid insulated damping conductor spacer has simple structure, easy manufacture, reliable performance, low manufacturing cost, economy, practicality and convenient mounting and is suitable for popularization and ice coating areas.
Owner:中国电建集团四平线路器材有限公司

Vertical type magnetic suspension flywheel energy storage system

The invention belongs to the field of electrotechnics, discloses a vertical type magnetic suspension flywheel energy storage system, and provides a vertical type magnetic suspension flywheel energy storage system advantaged in high rotating speed, low standby loss and low cost, mainly for the purpose of solving the structural defect existing in a conventional flywheel energy storage system in the prior art. The vertical type magnetic suspension flywheel energy storage system is mainly characterized in that a rotating shaft connecting a motor with a flywheel is omitted, the motor is designed to be of an external rotor structure and an external rotor of the motor is arranged on the inner wall of the cylindrical flywheel. A sufficient centripetal force is provided for the motor rotor rotating at a high speed by use of the feature that the flywheel itself is high in structural strength such that the design requirement for high rotating speed of the flywheel energy storage system is satisfied. A radial suspension portion in a support system employs a design of a permanent magnetic suspension bearing so that the design requirements for low cost and low standby loss are met; and the vertical type magnetic suspension flywheel energy storage system can be widely applied to such occasions as power grid peak adjustment and frequency modulation, an uninterrupted power supply, aerospace and the like.
Owner:张瑞彬
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