Dissertation > Excellent graduate degree dissertation topics show

Research on Remainder Detection Technique for Military Electronic Components Based on Random Vibration

Author: TangXiaoQing
Tutor: DiGuoFu
School: Harbin Institute of Technology
Course: Electrical Engineering
Keywords: military electronic components random vibration PIND test particle automatic detection
CLC: TN607
Type: Master's thesis
Year: 2010
Downloads: 70
Quote: 0
Read: Download Dissertation

Abstract


Military electronic components are basic components which are essential for national defense system, and its reliability directly affects safety of the national defense electronic system. The remainder particles in the military electronic components reduce the reliability and become one of the main reasons affecting their reliability. Particle impact noise detection (PIND) test is an important method of detecting remainder particles, which has great significance of improving the reliability of the aerospace system. In the paper the method and technology for detecting particles in the military electronic components are researched and studied in order to make up for the shortage of PIND and enhance detection accuracy.This paper analyzes the research status at home and aboard and proposes test conditions based on random vibration which covers a wider frequency because it is difficult to identify the best vibration frequency for the traditional sine vibration test of PIND method. To improve the ability of PIND detection, acceleration spectrum, amplitude and frequency range are selected. For the questions of PIND and test condition concluded by intensive analysis, this paper puts forward the scheme design and technique parameters of the auto-detection system of military electronic components particles based on random vibration. Sine and random vibration waves are generated by DDS principle and the random vibration algorithm based on spectrum balancing of shaker transfer function is proposed to meet PIND experimental conditions.The technology of the direct digital synthesizer and means of push-pull tube drive are used to design the drive power circuits. Processing circuits of acoustic signal are designed to amplify and filter the signal remainder particles. Meantime, a calibration circuit is used to regulate the system precision, and protection circuits are to prevent the damage of both over-voltage and over-current to the shaker and power device. Adopting modular design and C program language, the procedure of particles detection is realized. At last, a type of aerospace relays and military transistors are tested under vibration and random vibration test conditions, respectively. The test results indicate that the system based on random vibration has better detection ability and high degree of automation, with above 90% of test accuracy.

Related Dissertations

  1. Random Vibration Response Control and the Patran Redevelopment,O324
  2. Stochastic Optimal Control of Nonlinear Suspension of Quarter Car Model,U463.33
  3. Exact Fixed-Interfacial Substructure Synthesis Using Medium-Order Normal Modes,TB122
  4. Ballasted track structure vibration response probability analysis,U211.3
  5. Research on the Structural Reliability of Equipments in the Non-Gaussian Vibration Environment,E920
  6. Figure cell mapping method based on nonlinear stochastic systems globally gear Numerical Solution of,TH132.41
  7. The Seismic Research on Long-span Arch Bridge Based on Stochastic Theory,U442.55
  8. Dynamic Analysis, Optimization Design of Environmental Vibration Fixture and Its Software Implementation,TG751
  9. The Study of Relationship between Sinusoidal Vibration and Random Vibration on Aircraft Structure,V214.5
  10. The Contribution of Friction Damper to Decreasing Vibration of Aircraft Pipe,V214.5
  11. Research on Vibration Control of Single-Axis Electrohydraulic Angular Vibration Table,TP273
  12. Machine Isolation technical studies of the crystal oscillator,TN752
  13. Analysis and Research of Vibration Characteristics of Coach,U461
  14. CA6120U22D1 type passenger frame random vibration and fatigue analysis,U463.32
  15. CAD certain type of bus -based model and simulation of dynamic characteristics,U463.82
  16. The body structure based on virtual excitation random fatigue problem,U270.1
  17. Sensitivity Analysis and Random Vibration of Wind-Included Structure with TMD,O324
  18. Passive vibration of the crystal oscillator,TN752
  19. Analysis of Coupling Vibration of Vehicle-Track under the Condition of the Railway Track Irregularition,U211.3
  20. The mechanical properties of the plastic ball grid array package (PBGA) under different load conditions and optimization analysis,TN405

CLC: > Industrial Technology > Radio electronics, telecommunications technology > Electronic components, assemblies > General issues > Repair and maintenance
© 2012 www.DissertationTopic.Net  Mobile