58 results about "Slip factor" patented technology

The invention provides a pedal-driven vehicle (1) with a drive unit (12). The vehicle includes a pedal-driven apparatus (25) and a motor (10) as an auxillary device. The method involves detecting a slip factor (n, nmot), where the slip factor is detected as an alteration of pedal rotation speed over a turning rate sensor at the driven wheel. A pedal rotational torque is detected (130), and a drive unit is controlled based on the detected slip factor. A sum of the motor torque and the pedal rotational torque is controlled based on the detected slip factor.

The invention relates to an aircraft anti-skid brake control method based on brake moment feedback. The aircraft anti-skid brake control method comprises steps as follows: brake moment and revolving speed of aircraft wheels are detected; an actual slip factor is determined on the basis of the brake moment and the revolving speed; the actual slip factor and a slip factor threshold value are compared; if the actual slip factor is equal to the slip factor threshold value, the slip factor threshold value is updated; the brake moment is reduced so as to enable the actual slip factor to be smaller than the updated slip factor threshold value. According to the scheme, skid of the aircraft wheels can be avoided, and the anti-skid brake efficiency of an aircraft under the condition of complicated runway surfaces is improved.

The invention discloses a method for comprehensively optimizing tension setting of a six-roll skin pass unit, which belongs to the technical field of skin pass production. Fully considering the equipment and process characteristics of the six-high skin pass mill during the wet skin pass rolling process, according to this method, the set value of the tension of the six-roll pass pass unit is determined, and a set of optimal tension set values ​​of the pass pass machine is determined. Within the critical point, under the premise that the vibration judgment conditions are satisfied and the rolling pressure is not out of tolerance, the distribution of front tension, rolling pressure, and roll pressure is the most uniform in the transverse direction, and finally realize the improvement under the premise of ensuring that the skin pass unit does not slip and vibrate. The shape and surface quality of the finished strip can be improved to reduce the occurrence probability of color difference defects on the strip surface.

Techniques are provided for tuning a rotary positive displacement pump. The techniques include apparatus featuring a signal processor configured to the present invention may take the form of apparatus comprising a signal processor that may be configured to receive signaling containing information about actual pump performance data related to the operation of a rotary positive displacement pump; and determine corrected published pump performance data to operate the rotary positive displacement pump by compensating published pump performance data based at least partly on the actual pump performance data. The corrected published pump performance data may include a corrected published rated power, flow and slip factor, and the actual pump performance data contains information about actual power, specific gravity and viscosity related to the operation of the rotary positive displacement pump and received from a pump controller or controlling device, including a variable frequency drive.

PCT No. PCT/JP97/00791 Sec. 371 Date Nov. 13, 1997 Sec. 102(e) Date Nov. 13, 1997 PCT Filed Mar. 13, 1997 PCT Pub. No. WO97/34152 PCT Pub. Date Sep. 18, 1997A device for determining a correction factor for correcting an output of a rotational velocity mechanism for detecting the rotational velocity of a tire mounted on a vehicle, and a slip factor calculating device and a tire pressure drop detecting device utilizing the determining device. The rotational velocity of the tire is detected in response to the fact that an initializing switch is operated at the time of trial linear coasting. An initial correction factor is found on the basis of the rotational velocity. The initial correction factor is stored in an E2PROM. At a time of normal traveling, the rotational velocity is initially corrected on the basis of the initial correction factor (S2). Further, the slip factor is calculated on the basis of the rotational velocity after the initial correction (S3). A judged value required to detect the drop in air pressure in the tire is corrected on the basis of the slip factor or the like (S9). The initial correction factor representing only a relative difference in effective rolling radius between tires can be acquired, so that an initial difference can be eliminated from the rotational velocity with high precision.

The invention discloses a tension optimizing and compensating method for adjusting rolling force, and relates to control equipment or a method specially suitable for a metal rolling mill or other processed products, in particular to a tension optimizing and compensating method for adjusting rolling force according to an iron powder concentration of rolling lubrication emulsion. The method comprises the following steps: (A) a today emulsion iron powder monitoring concentration is obtained from a cold continuous rolling set control system; and frictional coefficients corresponding to all frames are calculated according to the today emulsion iron powder monitoring concentration; and (B) the obtained frictional coefficients are calculated according to an actual tension sum of all sections of strip steel to adjust the set tension of each section of the strip steel; slip factors of all the frames are calculated according to the set tensions and the rolling force of all the frames; and the set tensions are optimized and compensated with the smallest slip generation rate as target function. The method realizes the reduction of the generation rate of the increment of production cost and the plate shape defect caused by abnormal rise of the iron powder concentration to the greatest extent through optimizing the set tensions so as to guarantee the stability of rolling process.

The invention discloses a method of identifying slip factors causing slope instability by utilizing displacement monitoring. The method of identifying the slip factors causing the slope instability by utilizing the displacement monitoring includes the following steps: step one, the number of to-be-tested slopes, the number of samples of the slopes, and slope elements in a to-be-test area are determined; step two, slope displacement monitoring foundation pile points are arranged, displacement monitoring datum points are selected to form a slope displacement monitoring control net; step three, optical fiber monitoring displacement number equipment and equipment monitoring of the displacement monitoring datum points are arranged; step four, quantified slip factors and qualitative slip factors causing the slope instability are determined; step five, reference variable, namely slop displacement statistical magnitude is determined; step six, a prediction equation of relevancy of the slip factors causing the slope instability is set up; step seven, the prediction accuracy of the prediction equation of relevancy of the slip factors causing the slope instability is calculated; and step eight, the contribution and influence degrees of each slip factor to the slope instability are analyzed. The method of identifying the slip factors causing the slope instability by utilizing the displacement monitoring achieves the conversion from qualitative variable to quantitative variable, and resolves the problem of mutual conversion of multiple correlations among the factors.

A rolling speed optimization method with benefit control as a target in the cold continuous rolling process mainly comprises the following steps that 1, field parameters are collected; 2, unit friction characteristic parameters are collected; 3, unit benefit parameters are collected; 4, relevant parameters are defined; 5, the outlet speed, the reduction rate, the gate absolute draught and the equivalent tension influence coefficient of an ith rack are calculated; 6, the friction coefficient of the ith rack is calculated; 7, the rolling force of the ith rack is calculated; 8, the working roll elastic flattening radius, the outer friction force influence coefficient, the forward slip valve and the rolling torque of the ith rack are calculated; 9, the slip factor of the ith rack is calculated; 10, the slip index of the ith rack is calculated; 11, the rolling power of the ith rack is calculated; 12, the total electricity consumption of all racks of a unit is calculated; 13, a unit time benefit control target function expression is constructed; and 14, the optimal rolling speed is output. The reasonable target value for rolling speed control is set, enterprise cost is effectively reduced, and production efficiency is improved.

The invention relates to a diagonal flow pump impeller hydraulic design method. A design formula about main geometric parameters of the impeller is given, and includes an included angle Alpha between the outlet of the diagonal flow pump impeller and the horizontal line, the actual thickness Delta of each point of each vane, vane wrap angle Phi, the inlet fillet radius RTS of the rear cover plate of the impeller, the number z of impeller vanes, the diameter D2 of the impeller outlet, the width b2 of the vane outlet, the equivalent diameter D0 of the impeller inlet, a distance ZE between the vane inlet of the front cover plate and the outlet of the front cover plate of the impeller, a distance g1 from the inlet edge to the initial end of the curve of the front cover plate, the inlet fillet radius RDB of the front cover plate of the impeller, round nut radius Ra of the impeller, round nut height Rb of the impeller, the placing angle of the vane Beta, the placing angles Beta1 of inlet of the vane, the placing angles Beta2 of inlet of the vane, the slipping coefficient Rho and the hydraulic efficiency Etah. According to the impeller of the diagonal flow pump designed by the invention, the hydraulic efficiency of the impeller and the stability performance of the diagonal flow pump are improved, and computer programming is facilitated, and thereby the original similar design method and the velocity coefficient method of the diagonal flow pump can be replaced to a great extent.

A slip factor learning method of a dual clutch transmission (DCT) may include: determining, by a control unit, whether the DCT is up-shifted or down-shifted; comparing an engine speed to a shift start reference speed, and determining whether the engine speed enters an actual gear shifting period or actual gear shifting is completed, in response to the determined type of the gear shifting; comparing a magnitude of an engine torque to a magnitude of a clutch torque at a point of time that the engine speed enters the actual gear shifting period or the actual gear shifting is completed; and learning a slip factor at the point of time that the engine speed enters the actual gear shifting period or the actual gear shifting is completed, based on the magnitude comparison result between the engine torque and the clutch torque.