33results about How to "Limit jitter" patented technology

A method of transmitting time division multiplexed data from a satellite terminal to a satellite wherein the satellite terminal receives a command indicating to transmit data during a frame comprising a plurality of timeslots in accordance with a timeslot reordering scheme. The timeslot reordering scheme is selected to spread data from respective satellite terminals to different timeslots throughout the frames. A processor monitors the use of channels by the satellite terminals, stores bandwidth requests using queues, allocates channels in accordance with bandwidth requests and a bandwidth allocation algorithm, and transmits the channel allocations in a frame. Timeslots not allocated to any of the satellite terminals are contention channels. The number of contention channels changes dynamically, depending on demand for the plurality of channels by the satellite terminals. Queues are provided for each channel for storing high and low priority rate requests and high and low priority volume requests. The bandwidth allocation algorithm determines the preemption of the queues, and allocation priorities.

The invention relates to a torque control method for eliminating jitter caused in gaps of a car transmission system. The torque control method comprises the following steps: A, filtering a torque requested by a driver by a first filter coefficient; B, judging whether the torque requested by the driver and the filtered torque requested by the driver are reverse in direction or not; if reverse, determining that a first boundary value and a second boundary value of a torque region that causes the jitter, otherwise, continuously performing the judgment; C, judging whether the filtered torque requested by the driver is within a range between the first boundary value and the second boundary value, if the filtered torque requested by the driver is within the range, filtering the filtered torque requested by the driver by a second filter coefficient, otherwise, filtering the filtered torque requested by the driver by the first filter coefficient, and continuously performing the judgment in the step B. The torque control method has the advantages that when the transmission torque direction is changed, a problem that the whole car is caused to be jittered due to impact easily caused in a novel engaged tooth surface contact process can be effectively solved.

The invention relates to a method for actively controlling judder during the start-up of an electric vehicle based on pole assignment. The method comprises the following steps: (1) establishing an electric vehicle system original-state space model and determining a transfer function G<m>(s) of the motor speed omega<m> to the motor torque T<m>; (2) building a state observer, wherein the observation values outputted by the state observer comprise the motor speed omega<m>, the wheel angular velocity omega<w> and the semi-axis torsion angle theta; (3) designing a feedback controller, connecting the output end of the state observer to the input end of the feedback controller, and connecting the output end of the feedback controller to the input end of a motor controller, so as to form a closed-loop control system; (4) generating the compensating motor torque according to the gain of the feedback controller and the observation values outputted by the state observer; and (5) subtracting the compensating motor torque from the motor expected motor torque outputted by a complete electric vehicle controller to obtain the motor torque of the closed-loop control system, and controlling the motor motion according to the obtained motor torque. Compared with the prior art, the method provided by the invention is simple and good in control effect.

The invention provides a link delay processing method and device. The method includes the following steps: a synchronization information processor generates a source synchronization signal and a terminal synchronization signal which satisfy predetermined time sequence conditions; a data sending end sends data that adopt source synchronization signal marks to a data receiving end; a delay processor performs constant delay processing on the terminal synchronization signal; the data receiving end processes link delay between the data sending end and the data receiving end according to the received source synchronization signal which marks the data and the terminal synchronization signal after constant delay processing. Through the link delay processing method in the invention, the problem existing in related technology is solved that jitter exists in cross-clock domain delay, and jitter is constantly accumulated in multistage cross-clock domain and exceeds a range, thereby affecting system performance, and achieving an effect of effectively controlling and even completely eliminating link delay jitter of a source end to a terminal.

The invention discloses a clock control circuit, which comprises a first phase-locked loop, a second phase-locked loop and a third phase-locked loop, wherein the input end of the first phase-locked loop is connected with a first multiplexer; one end of the first phase-locked loop is connected with the output end of the second phase-locked loop, and an output signal of the first phase-locked loop is used as a reference signal of the second phase-locked loop; and the output end of the second phase-locked loop is connected with the phase shifter and the clock frequency divider and is used for controlling phase output after frequency division of the clock. A first PLL (Phase Locked Loop) in the clock control circuit is connected with a loop filter and a voltage-controlled crystal oscillator to form a PLL loop, so that a stable filtering clock can be output on the first PLL loop, and the stably output filtering clock is input into a second PLL loop to obtain an accurate jitter clock.

The invention discloses a damping component, a compressor and an air conditioner. The damping component for damping the compressor comprises: a damping pad; a support, wherein the damping pad is arranged on the support and the support is used for relieving deformation of the damping pad. The support is arranged in the damping pad, so that deformation of the damping pad is relieved; namely, the inside of the damping pad is hardened, shake of the compressor can be limited, the influence of shaking of the compressor upon pipelines is effectively relieved, and pipeline strain value can be decreased.

The invention provides a disk plate drving device, a hard disk driver and a shell for the hard disk dirver. To restrain a flutter of a magnetic disk in a high-speed hard disk drive, a ramp 40 is provided so as to be separated with a predetermined space from a side wall 12a of a base 12. Between the side wall 12a and the ramp 40 is formed a bypass channel 42. An air flow is supplied toward a magnetic disk 22 through the bypass channel 42. By using such a configuration, a flutter of the magnetic disk is reduced.

The invention discloses a material carrying device for a veneer reeling machine. The material carrying device comprises clamping devices, first mounting racks and first pedestals. The two sets of theclamping devices, the two sets of the first mounting racks and the two sets of the first pedestals are symmetrically arranged at the two sides of a feeding area of the veneer reeling machine. The clamping devices comprise supporting frames and first supporting rollers. The upper side and the lower side of each supporting frame are each provided with at least one first supporting roller. Gaps are reserved between the upper first supporting rollers and the lower first supporting rollers and used for clamping boards. The positions between opposite side plates of the supporting frames can limit the boards in the width direction. The upper first supporting rollers and the lower first supporting rollers can limit the thicknesses of the boards. The lower ends of the supporting frames are connected with the first mounting racks. The first mounting racks are fixedly connected with the corresponding first pedestals. The material carrying device for the veneer reeling machine has the characteristics of being simple in structure, suitable for the boards of various models, convenient to load and small in space occupation.

The invention provides a jitter control circuit within a chip. The jitter control circuit comprises an adaptive PDN, a current generator and a jitter generator. The adaptive PDN is capable of being controlled/modulated to provide difference impedances. The current generator is coupled to the adaptive PDN, and is arranged for receiving a supply voltage provided by the adaptive PDN and generating currents with different patterns. The jitter generator is coupled to the adaptive PDN, and is arranged for generating a plurality of jitters corresponding to the currents with different patterns, respectively, according to the supply voltage provided by the adaptive PDN. The invention further provides a jitter control method. The impedance of the PDN in the chip is adjustable, so that jitter of a signal can be effectively controlled.

The invention discloses an irrigation and drainage system capable of applying a fertilizer with water for a rice field, and belongs to the field of rice field irrigation. According to the irrigation and drainage system capable of applying the fertilizer with the water for the rice field, before fertilization, inert gas is filled into a fertilizer barrel so as to enter a pneumatic shaking belt and overflow, so that on one hand, the pneumatic shaking belt is in a wave shaking shape, a certain stirring effect is generated on a liquid fertilizer at the bottom of the fertilizer barrel, and on the other hand, overflowing gas has a certain impact effect on the liquid fertilizer, and the uniformity of a water-soluble fertilizer is effectively improved; in addition, shaking force is longitudinally guided to a fluctuating bottom piece through a linkage longitudinal rope, the fluctuating bottom piece fluctuates, and the undissolved water-soluble fertilizer is driven to vibrate, so that compared with the prior art, the dissolution of the water-soluble fertilizer is obviously accelerated, the blockage of a fertilization pipeline is effectively avoided, and the fertilization efficiency is improved; and meanwhile, the concentration difference of the liquid fertilizer before and after application is small, so that the non-uniform growth of rice is effectively avoided.

The invention relates to the field of welding technology, and discloses high-end equipment manufacturing welding auxiliary equipment. The high-end equipment manufacturing welding auxiliary equipment comprises a handle, wherein a square groove I is formed in the middle of the upper end of the handle; a square hole I is formed in the lower end of the square groove I; a vertical plate is movably inserted into the square hole I; the upper end of the vertical plate is fixedly connected with a slide block I; the lower part of the left side of the vertical plate is fixedly connected with a driving shaft; the left side of the handle is fixedly connected with a working box; a circular hole II is formed in the left side of the working box; a slide block II is movably inserted into the circular holeII; and a circular groove is formed in the left side of the slide block II. According to the high-end equipment manufacturing welding auxiliary equipment, a fixed block III is pushed in order that a push rod is driven to extrude a movable rod leftwards, a movable rod slides downwards, and a spring II is compressed gradually. Pushing of the fixed block III is stopped until the movable rod touches the ground, and shaking of welding tongs is limited due to the fact that the ground can support the movable rod, so that the effects of prevention of hand shaking, prevention of a welding rod from welding through a weldment and high welding efficiency are achieved.

The invention discloses a retaining device. The retaining device is used for preventing an arm section of a truss arm from shaking during a machining process, and comprises a supporting main body and at least one supporting leg group, wherein the supporting main body comprises a basic supporting part and at least one adjusting supporting part which is movably connected on the basic supporting part and corresponds to the at least one supporting leg group one by one, the supporting leg group comprises two supporting legs which are respectively connected on the corresponding adjusting supporting parts, the positions of the supporting legs relative to the basic supporting part can be changed by the adjusting supporting parts, and under the working condition of the retaining device, the two supporting legs are respectively rigidly supported on the supporting main body and symmetrically prop against the arm section of the truss arm. According to the retaining device disclosed by the invention, under the working condition of the retaining device, symmetrical rigid supporting forces are applied to the arm section of the truss arm by the two supporting legs, so that the retaining device can effectively resist an axial cutting component force, or enhance the rigidness of the arm section of the truss arm, thereby effectively controlling the shaking phenomenon of the arm section of the truss arm during the machining process.

The invention provides a transmission shell. The transmission shell comprises a transmission shell body, wherein a convex cavity for mounting a transmission element is arranged on the transmission shell body; one side of the convex cavity of the transmission shell body is a polygonal flange plate; a bushing mounting hole is formed in the other end of the convex cavity; an annular connecting hole is formed in the polygonal flange plate; the outer side of the transmission shell body is provided with a hand-held rod and a connecting block for limiting; a clamping groove is formed on the connecting end surface of the polygonal flange plate; a trapezoidal-shaped closed groove body is arranged at the joint of the polygonal flange plate and the convex cavity; a oiling cavity is formed in the convex cavity; and a key groove is formed on the inner side of the bushing mounting hole. The transmission shell provided has compact structure, convenient use and long service life.

The invention relates to the technical field of welding protective gloves, and discloses a multifunctional protective glove capable of preventing the hand from being scalded during welding work. The multifunctional protective glove comprises a handle, a square groove I is formed in the middle of the upper end of the handle, a square hole I is formed in the lower end of the square groove I, an adjusting rod is movably inserted into the square hole I, and a sliding block I is fixedly connected to the upper end of the adjusting rod; and the positions, close to the lower portion, of the left sideof the adjusting rod is fixedly connected with a driving shaft, the left side of the handle is fixedly connected with a control box, a second round hole is formed in the left side of the control box,a second sliding block is movably inserted into the second round hole, a round groove is formed in the left side of the second sliding block, and the outer side of the driving shaft is movably sleevedwith a first spring. By pushing a third fixing block, a push rod is driven to extrude a movable rod leftwards, the movable rod slides downwards, a second spring is compressed step by step until the movable rod touches the ground, pushing of the third fixing block is stopped, the ground has a supporting effect on the movable rod, and shaking of welding tongs is limited, so that the effects of preventing a welding rod from penetrating through a weldment in a welding manner due to hand shaking in the welding process and being high in welding efficiency are achieved.