38results 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 discloses an improved-transmission control protocol-friendly multicast congestion control (TFMCC)-protocol-based communication method, which is implemented by the following steps of: every time when a source receives a feedback data packet from a current limiting receiver (CLR), computing end-to-end one-way delay jitter between the source and the CLR according to effective timestamp information in the feedback data packet, and computing a congestion judgment factor by utilizing the delay jitter to judge congestion; and computing a correction factor by utilizing the congestion judgment factor to regulate expected throughput and further regulate a transmission rate. In the method, the transmission rate is regulated by calculating the end-to-end delay jitter between the source and the CLR as a congestion signal, and the end-to-end delay jitter of a TFMCC protocol is effectively controlled, thereby effectively reducing the jitter of the protocol, average end-to-end delay, average end-to-end delay jitter, an average packet loss rate and the like, improving the stability and overall performance of the TFMCC protocol, and making the protocol better serve a multicast protocol and more suitable for the transmission of multimedia services.

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 an anti-rebound hardware punching die. The punching die comprises a fixed bottom plate, a supporting rod, a supporting frame, a lower die base, a hardware part, a punching headand an upper die base. The supporting rod is fixedly connected to the upper portion of the left side of the fixed bottom plate. The upper portion of the supporting rod is fixedly connected with the supporting frame. The lower die base is fixedly connected to the middle portion of the upper portion of the fixed bottom plate. The hardware part is fixedly connected to the middle portion of the upperportion of the lower die base. The punching head is electrically connected above the fixed bottom plate. The top end of the fixed bottom plate is fixedly connected with the upper die base. The upperdie base is electrically connected with the punching head. Moreover, the fixed bottom plate, the lower die base, the hardware part, the punching head and the upper die base are located on the same perpendicular line. The anti-rebound hardware punching die is stable in structure, has the stable placement effect, can relieve punching jittering, is fast and convenient to clean, capable of reducing waste material rebound and good in cleaning effect and has high promotional value, and the problem that the hardware part is placed unevenly is solved.

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 an improved-transmission control protocol-friendly multicast congestion control (TFMCC)-protocol-based communication method, which is implemented by the following steps of: every time when a source receives a feedback data packet from a current limiting receiver (CLR), computing end-to-end one-way delay jitter between the source and the CLR according to effective timestamp information in the feedback data packet, and computing a congestion judgment factor by utilizing the delay jitter to judge congestion; and computing a correction factor by utilizing the congestion judgment factor to regulate expected throughput and further regulate a transmission rate. In the method, the transmission rate is regulated by calculating the end-to-end delay jitter between the source and the CLR as a congestion signal, and the end-to-end delay jitter of a TFMCC protocol is effectively controlled, thereby effectively reducing the jitter of the protocol, average end-to-end delay, average end-to-end delay jitter, an average packet loss rate and the like, improving the stability and overall performance of the TFMCC protocol, and making the protocol better serve a multicast protocol and more suitable for the transmission of multimedia services.

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 an adjustable drying box for non-woven fabric processing, which belongs to the technical field of non-woven fabric processing and comprises a box body, a first feed port positioned at the front end of the box body and a discharge port positioned at the rear end of the box body and positioned on the same horizontal plane with the first feed port. The high-pressure fan is mounted at the bottom in the box body, and the strip-shaped nozzles communicating with the output end of the high-pressure fan are arranged on the upper side and the lower side of the first feeding port, so that in the fabric conveying and drying process, gas exhausted by the strip-shaped nozzles is attached to the upper surface and the lower surface of fabric and exhausted in the fabric conveying direction, and the drying efficiency is improved. And the fabric is in a loose state in the box body, so that the fabric can be controlled to shake in a corrugated manner in the box body, the drying rate is improved, the fabric is not influenced by tension during conveying, and the quality of the dried fabric is ensured.

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 present invention discloses an adjustable drying box for non-woven fabric processing, which belongs to the technical field of non-woven fabric processing, and comprises a box body, a first feed inlet located at the front end of the box body, and a discharge outlet located at the rear end of the box body and at the same level as the first feed inlet. The present invention installs a high-pressure fan at the bottom of the box body, and provides strip nozzles that are connected to the output end of the high-pressure fan on the upper and lower sides of the first feed inlet. In the process of conveying and drying the fabric, the gas discharged from the strip nozzle can be respectively adhered to the upper and lower surfaces of the fabric and discharged in the conveying direction of the fabric, and the fabric is in a loose state inside the box body, so that the fabric can be controlled to shake in a corrugated shape inside the box body, which not only improves the drying rate, but also prevents the fabric from being affected by the tension during conveying, thereby ensuring the quality of the fabric after drying.

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 a puncture bed for children. The puncture bed comprises a bed board horizontally arranged left and right, a bed frame arranged on the outer side of the bed board and supporting legs installed at the lower end of the bed frame. A through hole for fixing a child is formed in the upper end of the bed board, a U-shaped pull belt penetrating downwards is installed in the through hole, an anti-falling tray abutting against the upper side of the bed board is arranged at the upper end of the pull belt, a bandage mechanism for fixing the body of the child is installed at the upper end of the tray, and the other end of the pull belt is connected with elastic cloth installed at the lower end of the side, close to the bed frame, of the bed frame and used for providing elastic tension. The puncture bed further comprises a guide mechanism arranged at the lower ends of the pull belt and the bed board and used for keeping the pull belt in a U shape, and a speed control mechanism capable of being clamped and fixed when the pull belt is rapidly pulled is arranged between the pull belt and the elastic cloth. When the child twists by a large margin, the pull belt rapidly moves and drives a guide plate to move downwards, and due to the inertia effect, a clamping plate and the guide plate are promoted to move relatively, and the clamping plate turns over and is clamped between protruding edges.

The invention discloses a belt accumulated slag cleaning device, and relates to the technical field of belt cleaners. The belt accumulated slag cleaning device comprises a main cross rod, and a roller and a scraper blade are arranged below the main cross rod through a connecting rod. According to the belt accumulated slag cleaning device, through the mode that the roller is arranged on a lower belt, shaking of the belt can be effectively controlled, the belt can stably pass through the scraping blade, and accumulated slag on the belt can be evenly scraped down through the scraping blade.

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 one-way valve comprises a valve body, a piston assembly and an isolation piece, an air inlet channel, a valve cavity and an air outlet channel are formed in the valve body, and the air inlet channel communicates with the air outlet channel through the valve cavity; the piston assembly is arranged in the area where the valve cavity is located, the piston assembly comprises a sealing piece and a spring, the spring is assembled between the sealing piece and the valve body in a pre-compression mode, and the sealing piece can block the air inlet channel under pushing of the spring; and at least part of the isolation piece is arranged on the spring in a sleeving mode, a connecting channel is formed between the isolation piece and the cavity wall of the valve cavity, and the isolation piece can isolate gas conducted in the connecting channel from the spring and is used for limiting the spring from shaking under the action of airflow. According to the one-way valve, at least part of gas conducted in the valve cavity is isolated from the spring through the isolation piece, so that the spring can be limited from shaking under the action of airflow, whistling can be avoided when the one-way valve works, and the function of improving the product performance is achieved.

The invention discloses a vortex air compressor for improving reliability of compressed air. The vortex air compressor comprises a base, a main shaft, a fixed disc, a movable disc, a movable disc mounting cover, a bearing end cover and a motor. The bearing end cover is used for covering the movable disc and the movable disc mounting cover to prevent external dust or particles from entering the movable disc or the movable disc mounting cover; and the main shaft is connected with the movable disc by penetrating through the main shaft bearing, so that the main shaft is supported by the main shaft bearing during moving, the jitter of the main shaft in moving is effectively limited, the movable disc can eccentrically move stably along a predetermined rail along with rotation of the main shaft, and the reliability of the vortex air compressor is effectively improved.

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 belongs to the technical field of automobile sensor fixing modes, and relates to a liquid level sensor bottom end fixing structure which comprises a liquid level sensor and further comprises a box body, the liquid level sensor is fixedly connected with the top of the box body, a groove is formed in the bottom of the box body, an elastic base is arranged in the groove, and the elastic base is fixedly connected with the box body. The bottom of the liquid level sensor is clamped with the elastic base and extrudes the elastic base, and the liquid level sensor fixing device has the advantage that the liquid level sensor is fixed more firmly.

The invention discloses a supple rehabilitation upper-limb exoskeleton. The exoskeleton comprises a big arm, a small arm and a hand which are sequentially connected; the big arm comprises a rotating driving device for driving the small arm to rotate; according to the small arm, the positions of the hand and the small arm are adjusted through a driven joint mechanism; the rotating driving device further comprises an elbow joint actuator and a damping module, wherein the elbow joint actuator is provided with an inner ring, an outer ring and an elastic structure, and the elbow joint actuator and the damping module are connected in parallel; during the movement, the rotating driving device of the big arm drives the inner ring of the elbow joint actuator to rotate, the inner ring drives the outer ring to rotate through the elastic structure, the outer ring drives the small arm to rotate, and the damping module is used for restraining mechanical vibration of the small arm driven by the elastic structure of the elbow actuator during the movement. The supple rehabilitation upper-limb exoskeleton is light in overall mechanism, the rigid impacts during the movement can be avoided, the safety of the mechanism and the human bodies is ensured, it is ensured that the mechanism is adaptive to people in different body shapes through the adoption of an extensible mechanism of the big and small arms, and the applicability of the mechanism is ensured.

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 tunnel type lithium ion battery appearance detection system comprises a conveying device, an information acquisition unit, a central control system and a detection assembly. The conveying device is provided with appearance detection stations along the way; the information acquisition unit is used for acquiring battery identity and specification dimension data; the detection assembly comprises an imaging unit and a position adjusting module. And the central control system is configured to generate an instruction according to the specification size data, drive the position adjusting module to act and adjust the spatial position of the imaging unit relative to the lithium ion battery. According to the method and the device, the battery specification parameters are acquired to drive the hardware mechanism to perform self-adaptive adjustment, so that the imaging distance adaptation of the lithium ion batteries with different specifications is realized, the problem that manual adjustment is needed during model changing is solved, and the flexibility degree and the detection efficiency of a production line are improved.

The invention relates to a motor positioning device, and relates to the technical field of mechanical testing. The motor positioning device comprises a lifting platform, a rack, a clamping mechanism, a shaft positioning mechanism, a sensor and a controller, the rack is vertically arranged on one side of the lifting platform; the clamping mechanism is arranged on the lifting platform and is used for clamping the body of the motor; the shaft positioning mechanism is arranged on the rack and is used for limiting the movement of a motor shaft of the motor; the sensor is arranged in the clamping mechanism and is used for detecting the pressure between the clamping mechanism and the body; and the controller is connected with the clamping mechanism and the sensor and used for judging whether the motor shaft is fixed by the shaft positioning mechanism or not according to the pressure detected by the sensor and controlling the work of the clamping mechanism. The motor shaft of the motor is fixed through the shaft positioning mechanism, movement of the motor in the vertical direction and the horizontal direction is limited, the body of the motor is clamped and fixed through the clamping mechanism, shaking of the motor is limited, and the motor testing result is not affected.

The invention relates to the technical field of forest-fruit picking, and discloses a vehicle-mounted vibration excitation type picking arm for fresh soapberry fruit. The picking arm for fresh soapberry fruit comprises a telescoping mechanism, a push-rod latching mechanism, a vibration excitation mechanism and a clamping mechanism, wherein the telescoping mechanism is able to conduct stretching and shrinking so as to drive the clamping mechanism to make contact with a soapberry fruit tree and control the clamping mechanism to conduct locking and clamping on a soapberry tree trunk; the push-rod latching mechanism conducts restrictions on the telescoping mechanism, that is, controls the stretching and the shrinking of the telescoping mechanism; the vibration excitation mechanism receives power from the outside and drives the telescoping mechanism and the clamping mechanism to conduct periodic vibration excitation movements so as to drive the soapberry fruit tree to vibrate and complete fresh fruit picking work. The vehicle-mounted vibration excitation type picking arm for fresh soapberry fruit is simple in structure, reliable in function and easy to operate and achieve, achieves the outbreak from manual picking of the soapberry fruit to mechanization, improves production efficiency and lowers the production cost at the same time, and avoids the damages caused to the fruit tree.

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 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.