microengineering mems and interfacing a practical guide

... medicine and health, manufacturing and transportation, power and energy systems, and avionics and national security NEMS and MEMS have important impacts in medicine and bioengineering (DNA and genetic ... functionally usable large-scale NEMS and MEMS The fundamental and applied research in NEMS and MEMS has been dramatically affected by the emergence of high-performance computing Analysis and simulation ... NEMS and MEMS for medical and biomedical, aerospace and automotive, electronic and manufacturing systems The importance of mathematical model developments and numerical analysis has been emphasized...

Ngày tải lên: 29/06/2014, 09:21

... medicine and health, manufacturing and transportation, power and energy systems, and avionics and national security NEMS and MEMS have important impacts in medicine and bioengineering (DNA and genetic ... functionally usable large-scale NEMS and MEMS The fundamental and applied research in NEMS and MEMS has been dramatically affected by the emergence of high-performance computing Analysis and simulation ... NEMS and MEMS for medical and biomedical, aerospace and automotive, electronic and manufacturing systems The importance of mathematical model developments and numerical analysis has been emphasized...

Ngày tải lên: 14/03/2014, 14:20

... The basic state-space averaged model 7.4.3 Discussion of the state-space averaging result 7.4.4 Example: State-space averaging of a nonideal buck-boost converter 7.5 Circuit averaging and averaged ... A2 .2 EE core data A2 .3 EC core data A2 .4 ETD core data A2 .5 PQ core data A2 .6 American wire gauge data Appendix Averaged switch modeling of a CCM SEPIC Index http://ece-www.colorado.edu/~pwrelect/book/contents/TOC.html ... resonant converters Publisher and vitals New York: Chapman and Hall, May 1997 Hardback ISBN 0-412-08541-0 TK7881.15.E75 1997 7"x10", 791 pages, 929 line illustrations Note: Chapman and Hall has...

Ngày tải lên: 13/12/2013, 01:15

... on available space in a particular machine assembly A scale layout drawing is often useful to arrive at an initial shape and size Weight is important depending on application For example, an aircraft ... Static load- Does not change in magnitude and direction and normally increases gradually to a steady value ii) Dynamic load- a) changes in magnitude- for e.g traffic of varying weight passing a bridge ... there are moving parts, friction and wear are inevitable High friction leads to increased loss of energy Wear of machine parts leads to loss of material and premature failure Cost and aesthetics are...

Ngày tải lên: 17/12/2013, 11:15

... developed at the contact P σbr = between a pillar and ground (figure- 2.1.2. 4a) is , at the contact A surface between a pin and a member with a circular hole (figure- 2.1.2.4b) is σ = P and at the faces ... Kharagpur A. 5: Consider a beam with a rectangular cross-section (figure-2.1.7.4) Consider now a longitudinal cut through the beam at a distance of y1 from the neutral axis isolating an area ABCD ... twist are the same for both the solid and hollow shafts, we may write from torsion formula τAl J Al = τSt JSt and τAl G Al = τSt G St where τ, J and G are shear stress, polar moment of inertia and...

Ngày tải lên: 17/12/2013, 11:15

... joints These joints are capable of handling relatively large angular misalignment and they are widely used in agricultural machinery, machine tools and automobiles .A typical universal joint is shown ... design and dimensions 5.1.2.2 Flexible coupling As discussed earlier these couplings can accommodate some misalignment and impact A large variety of flexible couplings are available commercially and ... shafts of standard lengths say 6-8m by couplings Coupling may be rigid or they may provide flexibility and compensate for misalignment They may also reduce shock loading and vibration A wide variety...

Ngày tải lên: 23/01/2014, 04:20

... spring for variable load In the earlier lecture, we have learned about design of helical springs for static loads In many applications, as for example in railway carriages or in automobile suspension ... a is known as the stress amplitude and τm is known as the mean stress or the average stress We know that for varying stress, the material can withstand stress not exceeding endurance limit value ... 0.46 Hence, as a rough guideline and on a conservative side, values for shear yield point and shear endurance limit for major types of spring wires can be obtained from ultimate strength as, τy σult...

Ngày tải lên: 23/01/2014, 04:20

... certain changes when it is acted upon by variable load It is required to calculate the mean stress and stress amplitude for all the loads, namely, axial, bending and torsion Thereafter, any of the ... methods for variable load, that is, Soderberg, Goodman or Gerber criteria is utilized Once again, the familiar design diagram for variable load in terms of the stress amplitude and the mean stress ... stress theory It states that a machine member fails when the maximum shear stress at a point exceeds the maximum allowable shear stress for the shaft material Therefore, τmax = τallowable ⎛ σeq ⎞ =...

Ngày tải lên: 23/01/2014, 05:20

... where ri and ro are internal and external radii of the vessel and since ri≈ ro = r ro – ri = t we have σz = (say) and t r σz θ p P dθ σθ σθ (a) (b) 9.1.1.2F- (a) Circumferential stress in a thin ... pr = 50MPa and therefore the rivets must withstand σθtc i.e tc MN per meter We may begin with 20mm diameter rivets with the allowable shear and bearing stresses of 100 MPa and 300 MPa respectively ... circumferential and longitudinal stresses developed on an element of the surface of the sphere are equal in magnitude and in the absence of any shear stress due to symmetry both the stresses are principal...

Ngày tải lên: 23/01/2014, 05:20

Ngày tải lên: 27/06/2014, 05:20

Ngày tải lên: 27/06/2014, 08:20

... Digital images can be stored in several ways, each of which has advantages and disadvantages that a graphic designer needs to understand Image types The two main image types are raster (bitmap) and ... wrap-around cover is a full with one continual thread Canadian and a partial wraparound is a half Canadian Clips and bolts Comb and spiral binding A fastening device that holds loose pages together ... applies endpapers Saddle stitch and head and tail bands to the spine Hard covers are attached Signatures are nested and bound with wire stitches applied and grooves along the cover edge act as...

Ngày tải lên: 01/07/2014, 10:43

Ngày tải lên: 10/08/2014, 11:21

Ngày tải lên: 10/08/2014, 11:22

Ngày tải lên: 10/08/2014, 11:22

... micromachining and microstructures, nano- and microscale electromechanical devices, analog and digital ICs, provide enabling benefits and capabilities to design and manufacture NEMS and MEMS Critical ... comprehensive analytical and numerical analysis (thorough analysis is needed as different actuator and sensor configurations are synthesized, and nonlinear electromagneticmechanical-thermal analysis ... domains carrying out numerical and analytical analysis of NEMS and MEMS To avoid excessive computations, optimal structures can be found using qualitative analysis and design That is, qualitative...

Ngày tải lên: 17/10/2013, 11:15

... dynamic if the reference (cammand) displacement was assigned 0.5 and radians, respectively From analytical and experimental results one concludes that the robust stability and tracking are guaranteed ... through sensing-actuation, learning, evolution, analysis, evaluation, behavioral (dynamic and steady-state performance) optimization and adaptation, etc Architectures for hierarchically distributed ... feedback commands (controls) are generated and executed, and intelligent updates and evolution are performed The feedback for sensor and control mechanisms are integrated, and particular emphasis...

Ngày tải lên: 19/10/2013, 18:15

... following variables and symbols are used: uas , ubs and ucs are the phase voltages in the stator windings as, bs and cs; uqs , uds and uos are the quadrature-, direct-, and zero-axis stator voltage components; ... a mathematical model of two-phase induction motors, we model the stator and rotor circuitry dynamics As the control and state variables we use the voltages applied to the stator (as and bs) and ... the Arbitrary Reference Frame The abc stator and rotor variables must be transformed to the quadrature, direct, and zero quantities To transform the machine (abc) stator voltages, currents, and...

Ngày tải lên: 19/10/2013, 18:15

... translational and rotational displacement variables The outcome of this lack of integrability leads to a lack of a one-to-one relationship between Cartesian variables and joint variables In fact, ... reports a paradigm allowing the high-level, task-oriented manipulation control of planar hands Whereas technological aspects of dextrous manipulation are highly advanced, theoretical aspects are ... these drawbacks, parallel manipulators have been proposed to withstand higher payloads with lighter links In a parallel manipulator, we distinguish one base platform, one moving platform, and various...

Ngày tải lên: 19/01/2014, 18:20