30results about How to "Solve the problem of out-of-sync" patented technology

The invention provides a compressor lower limit frequency control method and device and an air conditioner, wherein the compressor lower limit frequency control method comprises the following steps ofdetecting an operation parameter of the air conditioner, and adjusting the lowest operation frequency of the compressor according to the operation parameter, wherein the operation parameter comprisesthe phase current of the compressor. The compressor lower limit frequency control method comprises the following steps of judging the heavy load working condition of the compressor by detecting the operation parameters of the air conditioner, correspondingly adjusting the lowest operation frequency of the compressor when the compressor is in the heavy load working condition, preventing the operation frequency of the compressor from dropping to an over low value, further preventing the compressor from being out of step and avoiding influencing user experience.

The invention discloses a phase change control device of a variable-capacitance linear electrostatic motor. The phase change control device comprises a driving power supply, a current detection circuit, an integrator and a single-chip microcomputer, wherein the driving power supply is connected with the electrostatic motor and is used for outputting a three-phase driving signal so as to drive a rotor to slide; the current detection circuit is used for detecting the current data flowing through the electrostatic motor and transmitting the current data to the integrator; the integrator is used for integrating the current data to obtain electric quantity and transmitting the electric quantity to the single-chip microcomputer; and when the single-chip microcomputer judges that the absolute value of the electric quantity reaches the maximum, the motor is controlled to change phase. The invention further discloses a phase change control method of the variable-capacitance linear electrostaticmotor. The phase change control method comprises the following steps that firstly, the current data flowing through the electrostatic motor is acquired, and the electric quantity is obtained; and then the electrostatic motor is controlled to change phase at the moment when the maximum of the absolute value of the electric quantity is reached. According to the technical scheme, the phase change electrifying time of the variable-capacitance linear electrostatic motor can be shortened, the phase change frequency and the movement speed are increased, and the electrostatic motor can keep running stably for a long time.

The invention discloses a data synchronization method of a distributed system single board. The method comprises the following steps that: Step S102. when the shared data on the system single board changes, the system single board forms a data snapshot in a changing area and adds the version information thereof on the data snapshot; Step S104. the system single board sends the data snapshot addedwith the version information to other system single boards different from the system single board; Step S106. other system single boards adopt the data snapshot added with the version information to update the data copies themselves so as to keep the data synchronization with the system single board. The invention solves the problem of the desynchronizing of the synchronizing data and improves the stability of the system.

A method and system for controlling synchronization in the Semi-Persistent Scheduling (SPS) mode are disclosed in the present invention. The method includes that: a network side sets synchronization parameters corresponding to SPS resources; a Radio Network Controller (RNC) allocates the SPS resources and the corresponding synchronization parameters to a base station and a terminal by utilizing an SPS resource pattern list, wherein the SPS resource pattern list includes the SPS resources and the corresponding synchronization parameters; the terminal determines currently-used SPS resources and corresponding synchronization parameters, and synchronously adjusts uplink channels. The present invention can solve the problem that uplink channels are desynchronized due to the fact that the same synchronization parameters are utilized by a User Equipment (UE) while SPS resources are different (especially, the repetition periods are different).

The invention discloses a cradle head control method and device. The cradle head control device comprises a motor used for controlling a cradle head to rotate, an absolute encoder and a main processor, wherein the absolute encoder is used for obtaining initial position information of the cradle head and acquiring real-time position information of the cradle head after the motor executes a control action, and the control action comprises controlling the motor to rotate or stay at a standby state; and the main processor is used for reading the initial position information and the real-time position information, and determining whether to control the motor to execute a predetermined action corresponding to the control action or not according to the initial position information and the real-time position information. The cradle head control method and device disclosed by the invention solve a technical problem of step out of the motor.

The invention relates to a bandwidth request method of a bandwidth multimedia satellite system. A bandwidth request model adopted by the invention consists of three entities including a service source, a user terminal and a satellite. The bandwidth request of the bandwidth multimedia satellite system is realized by establishing a bandwidth request system model and designing a bandwidth request sending manner, a bandwidth requirement estimation algorithm and a synchronization mechanism. According to the bandwidth request method of the bandwidth multimedia satellite system, the limitation of single bandwidth request sending manner is overcome, the problem of low utilization efficiency of a bandwidth caused by an improper updating opportunity of an estimation value of 'slot time default' is solved, and the problem of step out between a bandwidth request agent and a bandwidth management unit caused by loss of the bandwidth request is solved. Not only can the utilization efficiency of a satellite system be obviously improved, but also the instantaneity of service transmission under a heavy-load service condition can be improved.

The invention discloses a method for calculating the transmission power of a special burst. The establishment of a wireless link is divided into a first stage and a second stage. In the first stage, when a terminal sends a special burst, the special burst The transmit power is calculated according to the transmit power of the uplink packet data channel (DPCH); in the second stage, when the terminal sends a special burst, the transmit power of the special burst is calculated according to the transmit power and gain factor of the uplink DPCH ; The present invention also provides a terminal for calculating the transmit power of a special burst. According to the technical scheme of the present invention, the out-of-synchronization problem caused by relatively low power of special bursts in the first stage of establishing a wireless link of a terminal can be solved.

The invention provides a motor driving method and system, comprising: obtaining the motion parameters of the motor and the drive signal of the motor, the motion parameters including the motion speed, the number of motion steps and the motion direction; determining the target of the sine meter drive unit based on the motion speed of the motor Subdivision gear, or determine the target subdivision gear of the sine meter drive unit based on the speed of motion of the drive signal and the motor; determine the number of moving steps of the table item in the sine meter drive unit based on the target subdivision gear and the number of motion steps, and Determine the moving direction and moving speed of the table item in the sine table drive unit based on the motion direction and speed; get the rotation angle of the motor based on the movement steps of the table item in the sine table drive unit and based on the moving direction of the table item in the sine table drive unit A target rotation direction of the motor is determined, so as to control the motor to rotate toward the target rotation direction at a rotation angle. The invention solves the problem that the motor is out of step due to insufficient torque in a high-speed or low-temperature environment.