4 results about "Instantaneous speed" patented technology

The invention provides an electronic whiteboard writing track optimization method and device, equipment and a storage medium, and the method comprises the steps: obtaining the coordinates, collection time, pressure values and inclination angles of a plurality of sampling points for writing on a screen of an electronic whiteboard through an intelligent pen, determining a central sampling point, and obtaining a writing track of the electronic whiteboard according to the coordinates and the collection time; the method comprises the following steps: determining speed information and acceleration information of a central sampling point according to coordinates of a Bessel curve, dynamically determining the order of the Bessel curve to determine a control point set, determining the instantaneous speed of each control point in the control point set according to the coordinates, and calculating the instantaneous speed of each control point according to the instantaneous speed, the pressure value, the inclination angle and the corresponding specified weight of each control point. According to the method, the width attribute value of each control point is determined, so that the writing track is smoother and has good impression, the width attribute value of each control point is determined based on various factors such as the instantaneous speed, the pressure value and the inclination angle, the line width of the target writing track is adjusted, the real handwriting feeling can be restored, and the writing experience is improved.

The present invention provides a train speed calculation method, device, equipment and readable storage medium. The method includes obtaining first information, second information and third information. The first information is the instantaneous speed of a first train when passing through the current bridge pier. The second information is the ground vibration speed corresponding to the instantaneous speed at a first position. The third information is the ground vibration speed corresponding to the instantaneous speed at a second position. Both the first position and the second position are set on the connection line between the bridge pier and the target. The shortest distance between the first position and the bridge pier is a preset distance, and the second position is set between the first position and the target. A vibration speed attenuation model is established according to the first information, the second information and the third information. The vibration speed attenuation model is used to calculate the ground vibration speed corresponding to the conduction of the instantaneous speed to the target. According to the vibration speed threshold and the vibration speed attenuation model, the maximum instantaneous vehicle speed of a second train passing through the bridge pier is obtained. The present invention can quickly obtain the maximum vehicle speed allowed when the train passes through the target through the vibration speed attenuation model.

The application provides a parameter setting method of a magnetic suspension bearing, which comprises the following steps: calculating electromagnetic force and acceleration according to current and position in a predetermined time interval; calculating displacement and speed increment according to the acceleration and instantaneous speed; repeating the above steps according to different current and position in a predetermined update number; and finally outputting the displacement to realize parameter setting. The displacement is further calculated according to the electromagnetic force and the acceleration in the predetermined time interval, and the final displacement output is corrected by continuously updating the current and position in different time periods, so that the technical problem of lacking a displacement output method with small result error in the prior art is solved.

The embodiment of the application provides a kind of clamp jaw control method, clamp jaw and storage medium, it is related to automatic control technical field.The specific implementation scheme is: receiving first control instruction, the actual distance between two clamping components is obtained;If the current actual distance is greater than the first specified distance indicated by the first control instruction, and the difference between the reference speed and the instantaneous speed of the clamping component is less than the preset speed, the clamping component is controlled to perform closing motion based on the first control force;If the current actual distance is greater than the first specified distance and the difference between the reference speed and the instantaneous speed of the clamping component is not less than the preset speed, the current second control force is calculated based on the integral of the difference between the reference speed and the instantaneous speed of the clamping component within the current statistical time range, and the clamping component is controlled to perform closing motion based on the difference between the first control force and the current second control force.