Download Abrams Main Battle Tank M1A1 and M1A2 by Glen Broman PDF

By Glen Broman

Museum Ordnance distinctive specializes in a selected automobile, sequence of cars, or clash. Designed essentially for modellers they're illustrated with b/w photographs drawings all through.

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Extra resources for Abrams Main Battle Tank M1A1 and M1A2

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As in the example of the viscous velocimeter. it is the restoring force Fr provided by Tr that decides the nature of the measurement. 23. but now we include noise and use a more general notation. The sensitive element is assumed to obey the characteristic relationship. 10) 1. PRINCIPLES AND ELEMENTS Of MEASUREMENT SYSTEMS 41 At the origin. • X = O. 24. 15) Substituting and rearranging. 14) and rearranging. 17) If GxA r~ 1. 24. Force balance sensor with noise at the sensitive element output. 18).

9. x Figure 1. 9. Asymmetric characteristic and its rectifying feature. y=f(x) can be approximated by the series expansion y=f(x)=ao + alX + a2x2 + a3x3 + ... A sinusoidal input, e. 9, would cause the output =ao + alvsinwt + a2v2(1-cos2wt)/2 + a3v3sinwt(1-cos2wt)/2 + ... Clearly, besides the harmonic distortions caused by the odd-power terms, the evenpower terms generate constants such as a2v2/2, which are in effect vibration-dependent bias terms that may be detrimental to the system performance.

The current Ir displayed by Ar is almost perfectly proportional to F r , and thus to p. Since the diaphragm hardly deflects, its nonlinearity becomes negligibly small and the excellent linear characteristic of the force transducer Tr now governs the measurement. 23. 23. Closed loop force balance arrangement. 3) where GF is the sensitivity coefficient of the membrane-detector assembly. 7) 1. 8) Thus. the pressure P is determined by the measured current Pm and the scaling coefficient Sir. 9) shows three significant results achieved by the closed-loop force balance arrangement.

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