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Aiming at evaluating the SEE performance of complex electronic system, the cellular automaton(CA) method is adopted. Based on the theory of the CA, the SEE soft error propagation model is proposed, and the analysis methodology is stated. For complex electronic system which consists of VLSIs devices, the CA model has been established and simulated in MATLAB software. Experiment indicates that the cellular...
To evaluate the total ionizing dose vulnerability of spaceborne signal processing platform, an accelerated radiation experiment is set up and on-orbit prediction method is proposed. For signal processing platform which consists of SRAM-based FPGA and DSP, function parameter and current variety are the two criterion of experiment. 60Co γ radial radiation experiment indicates that total dose is about...
On-orbit single event effect error rate is predicted combining accelerated radiation test and space radiation environment model for a FPGA-based signal processing platform. With partial TMR and reconfiguration mitigation method, there is no single event latch is observed when the surface linear energy transfer of heavy ion is 99.8 MeV.cm2/mg, and the error/SEU ratio is 4.7431e-004. Error rate of four...
Aiming at evaluating the SEE performance of complex electronic system, the multi-signal flow graph (MSFG) method is adopted. Based on the theory of the MSFG, the SEE soft error propagation model is proposed, and an analysis methodology is stated. For complex electronic system which consists of VLSIs devices, such as SRAM-based FPGA, the MSFG model has been established and simulated in TEAMS software...
Analytical method is becoming a novel and attractive method to evaluate the Single Event Effect (SEE) performance of the circuit implemented in SRAM-based FPGA. A SEE vulnerability analysis model of FPGA circuit is proposed, which describes the function between the soft failure rate and the SEE vulnerability bit of FPGA circuit. The analysis methodology of SEE vulnerability bit of switch matrix is...
The global navigation satellite system (GNSS) receivers are high susceptible to continuous wave (CW) interference. The CW suppression capability of GNSS can be further enhanced by using the adaptive infinite impulse response (IIR) notch filter. However the IIR notch filter will take in time delay (TD) error when it calculates the pseudo-range in GNSS receiver. A method to compensate the TD error based...
As the GPS signal simulator is applied more and more extensively, the test equipment of the GPS signal simulator is required higher and higher. Currently, the calibration using the standard instrument is the most important means, which severely restricts the test environment of the simulator. In order to meet the test requirements of the GPS signal simulator for diversified situation, this paper proposes...
The primary navigation positioning problems in AUV (Autonomous Underwater Vehicle) underwater docking were summarized. The docking phases were divided based on different operating ranges, and the positioning characteristics were analyzed, then the influences of docking orientation to positioning information requirement were discussed in detail. The navigation positioning technique and performances...
Presented is a new approach of DOA (Direction of Arrival) estimation based on carry waveform phase for coherent signals, for the purpose of simple algorithm, low processing requirement and low cost. According to the fixity of delay between units and the character of trigonometric function, the formula of DOA estimation for coherent signals is got by deduction in the algorithm. Simulation results show...
This paper introduces the research on connection design and optimization for cable connector which is applied to the underwater monitoring system. Design method which is based on time-sharing working of cable and backup of cable conductors will increase reliability of power supply and communication. However, it is complicated to choose optimal connection design with increasing of cable conductors...
The ventilator is a type of clinical life support apparatus which can help patients to enhance lung ventilation and accelerate metabolization. Proportional Assist Ventilation (PAV) is proposed with the concept of proportionally amplifying patientpsilas breathing effort. Knowing the patient component and ventilator component of work can help the physician to adjust the proportion of support by the...
The hardware design of homing system in torpedo has adopted a way of DSP+FPGA. DSP is used to process system information and FPGA (field programmable gate array) is used to control the bottom hardware. Considering the great amount of DSP in the system, 100 M Ethernet switcher is used to set up the interconnection of DSP. So any two DSP network node can conveniently do the data communication. It is...
To make multiprocessor parallel system which is made up often float digital signal processors TMS320C6713 work cooperatively and exchange data flexibly, the design that uses switched Ethernet as the communication method among processors is presented. The protocol conversion between serial port of DSP and reduced medium independent interface of Ethernet switch controller RTL8316 is realized by FPGA,...
To test STM-16 optical communication system, a VXI-based SDH protocol analyzer is constructed. VXI bus is a kind of outstanding instrument bus for ATE (auto test equipment). The core module of the SDH analyzer is FPGA, which can be reprogrammable. So it is convenient to add or reduce test function. In this paper, the payload, overhead and point analysis procedures are listed firstly, and then the...
The measuring error of wheel speed signal of anti-lock braking system (ABS) has been analyzed in this paper. It has been concluded that trigger error is the main factor which influences the wheel speed measurement limitation, and the correlation between trigger error and the wheel speed signal are surveyed by experiments. It is necessary in ABS to transform the wheel speed signal sampled in the form...
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