... Divide throughout by base circle radii to get "linear" equations and take rl=r2 [Il/r 22] (Al.r2) + [Dl/r 22] (VI r2) + [D 12/ r 22] (Vlr2-V2r2) + [k !2/ r 22] (slr2-s2r2+te) - Q/r2 [I2/r 22] ... [I2/r 22] (A2.r2) + [D2/r 22] (V2 r2) + [D 12/ r 22] (V2r2-Vlr2) + [k !2/ r 22] (s2r2-slr2-te) = - F 23 [I3/r 32 ] (A3.r3) + [D3/r 32 ] (V3 r3) + [D34/r 32 ] (V3r3-V4r3)... te 23 and te45 are ... Al + Dl VI + k !2 (sl-s2+te !2) + D 12 (V1-V2) = Q and similarly 12 A2 + D2 V2 - k !2 (sl-s2+te !2) - D 12 (V1-V2) = - F 23 r2 13 A3 + D3 V3 + k34 (s3-s4) + D34 (V3-V4) = - F 23 r3...
Ngày tải lên: 05/08/2014, 09:20
... size This fits in well if there is a double turbine power drive which is often wanted for reliability The design is as sketched in Fig 12.1 Power comes in via the two pinions labelled IP, splits ... = (i-16)*0.02; xl(i)=40.784*(sin(raHi-16)*0.02*cos(ra)); yl(i)=40.784*(cos(ra)+(i-16)*0.02*sin(ra)); end for i=(N+l):2*N ; % Image in x=0 other flank x2(i) = - xl(2*N+l-i); y2(i) - yl(2*N+l-i); ... excitations will be phased 120° of tooth frequency apart in time and at 120° in direction so there will be no net torsional vibration excitation on the sunwheel but a vibrating force which is
Ngày tải lên: 05/08/2014, 09:20
Gear Noise and Vibration Episode 2 Part 5 pps
... (brl*psil - brl*tan(phi3))/(pi*cos(phio)); r2 = (br2*psi2 - br2*tan(phi3))/(pi*cos(phio)); conratio = rl + r2; dispC angle rl r2 contact ratio') disp([phi3 rl r2 conratio]) % Iine28 ... Condition Monitoring 23 5 finishes, giving a relatively steady length of line of contact on a helical gear and, hence, a steady deflection A further complication arises with helical gears if ... revolution Fig 15 .2 Change in T.E due to part of tooth missing 23 6 Chapter 15 Ignoring system dynamics, this will give an increase of 20 % in the mean deflection and would increase elastic
Ngày tải lên: 05/08/2014, 09:20
Gear Noise and Vibration Episode 2 Part 6 ppt
... that with scuffing the Smith shock intensities rise relatively rapidly with time whereas with running-in the shocks decay with time They do not however Trang 2Condition Monitoring 241decay to zero ... amplitudes Reality is slightly more complicated than a simple test, as indicated in Fig 16.2 The original excitation from the gear teeth will transmit to the casing at both pinion bearings and both ... the oil will justify their use for monitoring debris in critical installations remains to be seen 15.6 Bearing signals Monitoring rolling bearing vibrations presents less practical problems than
Ngày tải lên: 05/08/2014, 09:20
Gear Noise and Vibration Episode 2 Part 7 potx
... the specification for the filter and the corresponding particle count in the gearbox Filters are specified in terms of their reduction 27 6 Chapter 18 ratio for particles of a given size so ... mentioned in Chapter 17 Fig 18.3 Sketch of gear tooth coupling Friction forces are controlled by axial velocity and. .. trouble by misaligning an input pinion or sun wheel of an epicyclic and ... the ideal oil viscosity for the high speed gears and bearings is totally unsuitable for the low speed gears and bearings It is advisable to bias the choice toward the low speed bearings and
Ngày tải lên: 05/08/2014, 09:20
Gear Noise and Vibration Episode 2 Part 8 potx
... specification, 27 5 requirements, 1 28 ringing, 129 Fluid couplings, 24 2 Force impact, 25 2 position variation, 32 radial bearing, 32 Fourier ideas, 1 42 fast, 143 Frequency analysis, 1 42 ... conversion, 147 definition, 146 Pulses buildup, 143 ,25 0 frequencies, 25 1 half sine, 25 1 injection interpolation, 95 measurement, 25 2 slowing down,... 26 8 testing, 26 5 vibration, 26 ... University, 10 Hypocycloidal, 3 Impedances, 83 Impulse Dirac, 25 0 power, 25 6 testing, 25 5 Inertia decoupling, 1 92 Integration digital, 125 double, 104 frequency range, 125 Index 29
Ngày tải lên: 05/08/2014, 09:20
Intelligent Vehicle Technology And Trends Episode 2 Part 2 ppsx
... braking, and speed) Positioning system (e.g., GPS and GIS map) Communications (receiver) Driver vehicle interface Data stream from signal with phase and timing information Signalized intersection ... merging vehicle’s position is indicated by this moving indicator as sort of a “ghost image.” The precise position of the merging vehicle is indicated by flashing red lights, and a safety margin ... right of way issues such as yield and stop signs, and crossing traffic conditions. The INTERSAFE consortium is mainly focusing on stop sign assistance, traffic light assistance, turning assistance
Ngày tải lên: 05/08/2014, 11:20
Metal Machining - Theory and Applications Episode 2 Part 11 ppt
... optimization 28 5, 28 7 for cutting force reduction 115, 116, 25 8– 62 Tool life criteria for 130–1 and machine stiffness 134 for maximum productivity 24 –7, 30 2 for minimum cost 27 – 32 monitoring ... 322 –3 fault diagnosis with 323 –4 feed-rate optimization by 320 2 reasons for 318 20 Model-based quantitative monitoring and integration with process planning 313 and optimization of machining 315–16 tool ... in 27 1 2 times and costs 30 2 tool angle definitions 40–1 Minimum cost 27 – 32, 28 8–90 Minor cutting edge 183–4 Model-based systems for simulation and control dimensional error limitation by 322 –3 fault...
Ngày tải lên: 21/07/2014, 17:20
Metal Machining - Theory and Applications Episode 2 Part 10 pot
... 24 27 25 29 austenitic stainless 14–17 15–18 17 21 22 25 26 29 high manganese 14 16 19 21 22 Aluminium pure, 1000 series 20 0 24 0 20 0 23 0 20 0 22 5 190 22 0 – 20 00 to 7000 series 120 –190 160 20 0 ... 31 0.04–0 .25 C 52 60 48–54 42 45 35–37 29 –30 0 .25 –0.8C 51– 52 46–48 39– 42 33–35 29 –30 0.8–1.2C 45–51 42 46 37–39 32 33 27 29 low alloy 25 –49 30–45 32 40 30–35 27 –30 ferritic stainless 21 24 22 25 23 26 24 27 ... 5.8–6 .2 austenitic stainless 3.5–4.5 4 .2 4.7 4.5–4.8 5 .2 5.5 5.6–5.9 high manganese 3.9 4.6 – – – Aluminium pure, 1000 series 2. 4 2. 7 2. 6 2. 8 2. 6 2. 9 2. 6 2. 9 – 20 00 to 7000 series 2. 1 2. 8 2. 5–3.1...
Ngày tải lên: 21/07/2014, 17:20
Metal Machining - Theory and Applications Episode 2 Part 9 doc
... equation Equation (A2 .21 ), after differentiation with respect to x, y and z, and equation (A2 .23 ) are substituted into I e (T) of equation A2.19. The variation of I e (T) with respect to T i , T j , T k and ... Appendix 2 Childs Part 3 31:3 :20 00 10: 42 am Page 360 imposing a hydrostatic pressure on the deviatoric stress field. Its size, from slip line field modelling, p 2 in equation (A3.11) with 2y ≈ ... u˘ x in the x- direction. Selected problems, with convection 355 Fig. A2 .2 Some problems relevant to machining: (a) surface heating of a stationary semi-infinite solid; (b) an infinite solid moving...
Ngày tải lên: 21/07/2014, 17:20
Metal Machining - Theory and Applications Episode 2 Part 8 pptx
... material is negligible, the integration of the equilibrium and compatibility equations, under the constraint of the constitutive equations, is simplified by describing the stresses and velocities ... slip-line fields are given in Section A1 .2. 5. A1 .2. 4 Further considerations Slip-line fields must satisfy more than the force and velocity conditions considered in Sections A1 .2. 2 and A1 .2. 3. First, ... slip line, but only if it is of constant size along the line. It is not implied that there is a discontinuity in the condition of the example described here: examples of actual machining slip-line...
Ngày tải lên: 21/07/2014, 17:20
Metal Machining - Theory and Applications Episode 2 Part 7 ppt
... little intelligence to assist decision making. For this purpose, expert systems for determining initial cutting conditions and cutting state monitoring tech- nologies are increasingly being implemented. ... questions, initially in terms of principal stresses and strains (Figure A1.1) concerning (i) what combinations of principal stresses s 1 , s 2 , and s 3 will cause yielding of a metal; (ii) if ... combined with equilibrium and compatibility equations and boundary condi- tions. If the flow is in plane strain conditions and when a metal’s elastic responses and work hardening can be ignored,...
Ngày tải lên: 21/07/2014, 17:20
Metal Machining - Theory and Applications Episode 2 Part 6 pot
... to or instead of heuristic (qualitative) expertise. Then the Optimization of machining conditions 29 3 Childs Part 3 31:3 :20 00 10:38 am Page 29 3 where MT 1 is extreme finishing, MT 2 finishing, ... constraint. Optimization of machining conditions 303 Fig. 9 .21 Fuzzification of a numerical value x ¯ Fig. 9 .22 Fuzzification of a qualitative term, e.g. machining type (Chen et al ., 1995) Childs Part ... 3 31:3 :20 00 10:39 am Page 29 8 Pattern recognition with artificial neural networks It is now known that linear classification, with linear discriminant functions, has only limited use in pattern...
Ngày tải lên: 21/07/2014, 17:20
Metal Machining - Theory and Applications Episode 2 Part 5 ppsx
... Critical constraints A constraint, the limit line of which contains the optimum point M V or M d , is called a crit- ical constraint and the limit line a critical line. Two critical constraints ... R ∼ i with membership functions 10 ≤ g i (x) ≤ g ic– g ic+ – g i (x) m i (g i (x)) = { ————— g ic– < g i (x) ≤ g ic+ (9.32a) g i c+ – g ic– 0 g ic+ < g i (x) Optimization of machining conditions ... This is why the tool and cutting conditions must be optimized simultaneously. The simultaneous optimization of tool and cutting conditions is described later, in Section 9.3.4. 9.3 .2 Fuzzy logic...
Ngày tải lên: 21/07/2014, 17:20
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