Purpose The Einstein Probe(EP)is an X-ray astronomical satellite designed for time-domain astronomy.The Follow-up X-ray Telescope(FXT)is an important payload on the EP.The FXT’s detector utilizes a pn-junction charge...Purpose The Einstein Probe(EP)is an X-ray astronomical satellite designed for time-domain astronomy.The Follow-up X-ray Telescope(FXT)is an important payload on the EP.The FXT’s detector utilizes a pn-junction charge-coupled device(pnCCD),which is currently the fastest-readout X-ray CCD worldwide.The design and implementation of a dedicated power-supply and monitoring module constitute a key aspect in the development of the detector system.Methods The FXT comprises several components,including the electric control box(EC-Box),the detector electronics box(DE-Box),and the focusing camera.The detector module of the focusing camera consists of two primary components:the pnCCD and the multi-channel analog signal processing chip known as the CAMEX(CMOS amplifier and multiplexer)ASIC.The CAMEX ASIC is used for the readout of the pnCCD signals.The operation of the detector module requires a sophisticated power-supply module.This paper details the design and implementation of a dedicated power-supply and monitoring module for the detector module.Based on the voltage requirements of the detector module,the power-supply module has been designed to include switchable,adjustable,and programmable functions.The monitoring module includes voltage,current,and temperature monitoring based on the different types of monitoring.Results The power-supply and monitoring module operates reliably and performs effectively in orbit,meeting the requirements of the FXT payload on the EP satellite.Conclusion The power-supply and monitoring module has successfully provided a stable power-supply and monitoring module for the detector module.It operates effectively in orbit,ensuring that the detector system achieves optimal performance.展开更多
An active distribution system power-supply planning model considering cooling,heating and power load balance is proposed in this paper.A regional energy service company is assumed to be in charge of the investment and...An active distribution system power-supply planning model considering cooling,heating and power load balance is proposed in this paper.A regional energy service company is assumed to be in charge of the investment and operation for the system in the model.The expansion of substations,building up distributed combined cooling,heating and power(CCHP),gas heating boiler(GHB)and air conditioner(AC)are included as investment planning options.In terms of operation,the load scenarios are divided into heating,cooling and transition periods.Also,the extreme load scene is included to assure the power supply reliability of the system.Numerical results demonstrate the effectiveness of the proposed model and illustrate the economic benefits of applying distributed CCHP in regional power supply on investment and operation.展开更多
The internal structure of the inertial measurement unit(IMU)in active state is easily damaged in the high overload environment.So that the IMU is usually required to be powered within the disappearance of the high ove...The internal structure of the inertial measurement unit(IMU)in active state is easily damaged in the high overload environment.So that the IMU is usually required to be powered within the disappearance of the high overload.In this paper,a mechanical switch is designed to enable the IMU based on the analysis of the impact of high overload on the power-supply circuit.In which,parameters of mechanical switch are determined through theoretical calculation and data analysis.The innovation of the proposed structure lies in that the mechanical switch is triggered through the high overload process and could provide a delay signal for the circuit.After all,the proposed switch is tested through mechanical simulation,impact test and practical test.The experimental results show that the designed mechanical switch can effectively and reliably provide the delay for the circuit and guarantee operation of the IMU under high overload.展开更多
基金supported by the Strategic Priority Research Program on Space Science,the Chinese Academy of Sciences(Grant No.XDA 15310103).
文摘Purpose The Einstein Probe(EP)is an X-ray astronomical satellite designed for time-domain astronomy.The Follow-up X-ray Telescope(FXT)is an important payload on the EP.The FXT’s detector utilizes a pn-junction charge-coupled device(pnCCD),which is currently the fastest-readout X-ray CCD worldwide.The design and implementation of a dedicated power-supply and monitoring module constitute a key aspect in the development of the detector system.Methods The FXT comprises several components,including the electric control box(EC-Box),the detector electronics box(DE-Box),and the focusing camera.The detector module of the focusing camera consists of two primary components:the pnCCD and the multi-channel analog signal processing chip known as the CAMEX(CMOS amplifier and multiplexer)ASIC.The CAMEX ASIC is used for the readout of the pnCCD signals.The operation of the detector module requires a sophisticated power-supply module.This paper details the design and implementation of a dedicated power-supply and monitoring module for the detector module.Based on the voltage requirements of the detector module,the power-supply module has been designed to include switchable,adjustable,and programmable functions.The monitoring module includes voltage,current,and temperature monitoring based on the different types of monitoring.Results The power-supply and monitoring module operates reliably and performs effectively in orbit,meeting the requirements of the FXT payload on the EP satellite.Conclusion The power-supply and monitoring module has successfully provided a stable power-supply and monitoring module for the detector module.It operates effectively in orbit,ensuring that the detector system achieves optimal performance.
基金This project is supported by National High Technology Research and Development Program of China(863 Program)(No.2014AA051902).
文摘An active distribution system power-supply planning model considering cooling,heating and power load balance is proposed in this paper.A regional energy service company is assumed to be in charge of the investment and operation for the system in the model.The expansion of substations,building up distributed combined cooling,heating and power(CCHP),gas heating boiler(GHB)and air conditioner(AC)are included as investment planning options.In terms of operation,the load scenarios are divided into heating,cooling and transition periods.Also,the extreme load scene is included to assure the power supply reliability of the system.Numerical results demonstrate the effectiveness of the proposed model and illustrate the economic benefits of applying distributed CCHP in regional power supply on investment and operation.
基金This work was supported by the National Natural Science Foundation of China(No.61803203).
文摘The internal structure of the inertial measurement unit(IMU)in active state is easily damaged in the high overload environment.So that the IMU is usually required to be powered within the disappearance of the high overload.In this paper,a mechanical switch is designed to enable the IMU based on the analysis of the impact of high overload on the power-supply circuit.In which,parameters of mechanical switch are determined through theoretical calculation and data analysis.The innovation of the proposed structure lies in that the mechanical switch is triggered through the high overload process and could provide a delay signal for the circuit.After all,the proposed switch is tested through mechanical simulation,impact test and practical test.The experimental results show that the designed mechanical switch can effectively and reliably provide the delay for the circuit and guarantee operation of the IMU under high overload.
