33results about How to "Limit jitter" patented technology

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 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 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 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 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 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 an air compressing device of an air compressor. The air compressing device is used for improving the reliability of air compression of the air compressor. The air compressing device comprises a base, a bearing end cover, a spindle, a movable disc installation cover, a movable disc and a fixed disc. The bearing end cover is fixedly connected with the base. A spindle installation through hole is formed in the middle of the bearing end cover. A spindle bearing matched with the spindle is fixed in the spindle installation through hole. The bearing end cover is used for covering the movable disc and the movable disc installation cover, and outside dust or particles are prevented from entering the movable disc or the movable disc installation cover. The spindle penetrates through a spindle bearing to be connected with the movable disc, so that the spindle is supported by the spindle bearing during movement, shaking of the spindle during movement is effectively limited, the movable disc can make eccentric motion stably along a preset rail along with the rotation of the spindle, and thus the reliability of the vortex type air compressor is effectively improved.