31results about How to "Avoid system failure" patented technology

A method of controlling a hybrid construction machine capable of preventing a system from being rendered inoperative without increasing a capacitance of a capacitor and of inhibiting delay of a swing operation relative to an operation command at the time of swing operation, and the hybrid construction machine are provided. For this purpose, at the time of discharge of the capacitor, actual torque command values are respectively generated by referring to an assist torque limit value corresponding to capacitor voltage of a generator motor and a swing power running torque limit value corresponding to the capacitor voltage of a swing motor, as well as, at the time of charge of the capacitor, an actual target output value of the generator motor is generated.

The invention discloses a network file management realization method and system. The realization method comprises the steps of S1, establishing input and output message queues and starting a resource management process; and S2, storing file download requests sent by an external process in the input message queue, wherein according to the resource management process, the file download requests are extracted from the input message queue one by one, one of multiple connected file servers is selected for downloading request files, and file download results are stored in the output message queue. The method and the system belong to the technical field of network communication. Concurrent download of massive service files can be realized.

A laser diode driving method that reliably maintains average optical power and extinction ratio is disclosed. The present invention for laser driving uses a preloaded laser diode characteristic curve/table and/or mathematical equations to create a programmable bias and modulation current range. This ensures stable closed-loop operation and prevents system failure if the feedback signal is impaired by confining the operation of the laser diode to a normal operating range.

The invention discloses a robustness anomaly detection method based on local and global statistical analysis. According to the method, modeling is carried out on the basis of local information and global information, then an comprehensive index is judged, and if the index exceeds a preset judgment condition, it is determined that an anomaly happens once. According to the method, an anomaly detection model in current industrial application is improved, a local model and a global model are combined, and the comprehensive index is comprehensively considered for early warning so that possible system faults can be avoided, and the effect of predictive maintenance is achieved.

The invention provides a photovoltaic rapid turn-off system and a control method thereof. An inverter enters a period in each turn-off state of a turn-off device in the system when the system is in a limited power operation state, and electric signal disturbance is applied to a DC bus of the system at least once; each turn-off device can detect the input parameter and/or the output parameter of the turn-off device so as to judge whether the electric signal disturbance of the direct current bus connected with the turn-off device meets a preset condition or not; and if the judgment result is yes, the turn-off device enters or maintains an on state. Namely, according to the control method of the photovoltaic rapid turn-off system provided by the invention, the inverter intermittently applies the electric signal disturbance to the DC bus so that the turn-off device can be ensured to maintain the on state, and the loss of the power generation capacity of the system caused by mistaken turn-off of the turn-off device is avoided; and when the photovoltaic rapid turn-off system is in a limited power operation state, the inverter can be prevented from continuously applying electric signal disturbance, and the output power is ensured not to exceed a power limit value.

The invention discloses a mechanical type forced levelling device. According to the mechanical type forced levelling device, under the condition that normal working of a lifting carrier is not affected, the up-down position of the carrier is locked, and system fault caused by positioning offset of the lifting carrier is avoided. The mechanical type forced levelling device comprises forced levelling mechanisms arranged on a lifting carrying frame of the lifting carrier and a plurality of levelling seat assemblies arranged on a fixed steel framework of a parking garage. The forced levelling mechanisms comprise levelling shaft sets and rotating driving executing mechanisms. Each levelling shaft set comprises a vertical mandrel arranged on the lifting carrying frame, a rotating shaft sleeve rotatably arranged on the vertical mandrel and a radial force-bearing shaft which is arranged on the rotating shaft sleeve and radially extends along the vertical mandrel. The rotating driving executingmechanisms are used for driving the radial force-bearing shafts to rotate around the vertical mandrels. Each levelling seat assembly comprises at least one levelling seat provided with a limiting groove matched with a supporting bearing.

The invention discloses a system and a method for automatically backing up a modification file in a K-UX operation system, and relates to a file management technology. The system for automatically backing up the modification file mainly comprises an auditing monitoring module, a confirmation module and a backup module. Through the method for automatically backing up the modification file, a specified file can be audited, modification content interactive confirmation is performed in a file modifying process, and finally a file before modification is automatically backed up. According to the method and the system, system faults caused by false modification of configuration can be effectively avoided and a manual misoperation probability can be reduced.

A self-cleaning oil recharging lockup valve of a combination type hydraulic cylinder is characterized by comprising a valve body with an oil inlet V1, an oil outlet C1, an oil inlet V2 and an oil outlet C2, and a first check valve component, a second check valve component, a first hydraulic control check valve and a second hydraulic control check valve which are arranged in the valve body; and the oil inlet V1 of the valve body is communicated with an axial port in a valve body of the first check valve component and an oil passage in the valve body, the working oil outlet C1 in the valve body is communicated with a radial oil port in the valve body of the first check valve component and an axial oil port in the valve body of the first hydraulic control check valve, the oil inlet V2 of the valve body is communicated with the axial port in the valve body of the second check valve component and the oil passage in the valve body, the working oil outlet C2 in the valve body is communicated with the radial oil port in the valve body of the first check valve component and the radial oil port in the valve body of the first hydraulic control check valve, the oil passage in the valve body is communicated with a hydraulic port of the second hydraulic control check valve, the oil passage in the valve body is communicated with the hydraulic port of the first hydraulic control check valve, and an oil return port T in the valve body is communicated with the radial oil port in the valve body of the first hydraulic control check valve and the radial oil port in the valve body of the second hydraulic control check valve.

For a circuit breaker system (3) comprising a first circuit breaker (1) and a second circuit breaker (2), the first circuit breaker (1) has a first tripping unit, a first control unit, which controls the first tripping unit, and a first electrical sensor, the second circuit breaker (2) has a second tripping unit, a second control unit, and a second electrical sensor, which controls the second tripping unit. The first control unit controls the first tripping unit, the second control unit controls the second tripping unit, the circuit breaker system (3) further comprises a device for communication of the first control unit and the second control unit, it is suggested that the first control unit monitors whether an internal component fault exists in the second circuit breaker (2) through the device for communication, and the second control unit controls the second tripping unit. Wherein the first control unit is adapted to change its standard trip characteristic to an emergency trip characteristic when an internal device failure of the second circuit breaker (2) is detected.

A system for indicating the presence of a substance in an article, wherein the article comprises at least one component, comprises: means for selecting a substance; a component data unit for providing component data wherein the component data comprises at least one material comprised in each component; a primary material records unit for providing a plurality of primary material records; a secondary material records unit for providing a plurality of secondary material records; a substance record unit for providing a plurality of substance records associated with a material, wherein each substance record contains percentages of substances contained in the associated material; and a processor configured to: select material records of the at least one material from the primary material records unit if the at least one material is present in the primary material records; select material records corresponding to the at least one material from the secondary material records unit if no substance records associated with the at least one material are present in the substance record unit; calculate the total amount of the selected substance present in the article based on the component data, selected material records, and substance records, and provide an indication of the total amount of the selected substance.

The invention provides a control system for an automatic chemical silicon chip corroding machine, which comprises a manipulator and is characterized by further comprising a servomotor, a servomotor driver, a servo drive module and an PLC (Programmable Logic Controller ), the PLC is connected with the servo drive module, the servo drive module is further connected with the servomotor driver, the servomotor driver is connected with the servomotor, and the servomotor is connected with the manipulator. The control system provided by the invention has the benefit of accuracy in positioning, improves the quality of products processed by the chemical corroding machine, and increases the qualification rate.

The present invention relates to a message synchronizing method. It contains MC transmitting synchronizing notification to UM server; MC collecting user UM message; UM server collecting user UM message and sending to MC; MC comparing both stored user UM message information difference; according to comparison result to judge whether existing user UM message only in UM server, if it is then executing the next step, otherwise MC deleting self stored user UM message; MC transmitting obtaining notification to UM server; UM server transmitting self existent user UM message list to MC; ending. The present invention solves Disconnection or MC fault resulted problem between MC and UM server.

A high-reliability phase-locked loop module comprises a phase-locked loop unit, a phase-locked loop monitoring unit and a clock switching unit, the phase-locked loop unit is connected to the phase-locked loop monitoring unit, and the output of the phase-locked loop monitoring unit and the output of the phase-locked loop unit are respectively connected to the clock switching unit. The phase-lockedloop monitoring unit is used for monitoring the working state or parameters of the phase-locked loop unit, and the clock switching unit is used for switching the output clock of the phase-locked loopmodule according to the monitoring result of the phase-locked loop monitoring unit. According to the technical scheme, automatic switching of the output clock of the phase-locked loop can be achieved,power consumption is reduced, cost is saved, the problems of system faults, breakdown and the like caused by phase-locked loop unlocking and jittering of the input reference clock of the phase-lockedloop can be avoided, and the stability and reliability of the system are greatly improved.