modeling analysis and control

... constants A and B are determined by substitution into the differential equation and, as expected, are found to be -2 and A, respectively Then * x ( t ) = - 2 + fie 2t + Cle-’ + C2em2’ + Cse’ and the ... linear In mathematical notation, this means: ~bfl(~) + bf2Wl = 4fl(O) + mf2Wl where a and b are constants, and f 1 and f2 am two functions of t Proof Using the definition, Uafl(t) + bfdt)) = lom[aflO) ... satisfies the differential equation and initial conditions and hence is the desired solution This third step is frequently the most difficult or tedious step and will be developed further in the

Ngày tải lên: 22/12/2013, 21:18

... Dynamic modeling for control of the milling process, ASME Journal of Engineering for Industry, 110, 4, 367–375. 50 Tomizuka, M and Zhang, S., 1988, Modeling and conventional adaptive PI control ... (Ed.), 129–180, Pergamon Press, Oxford, England 19 De Filippi, A and Ippolito, R., 1969, Adaptive control in turning: cutting forces and tool wear 20 Danai, K and Ulsoy, A G., 1987, An adaptive observer ... G., and Danai, K., 1991, Flank wear estimation under varying cutting 22 Kannatey-Asibu, E and Emel, E., 1987, Linear discriminant function analysis of acoustic emission 23 Houshmand, A A and

Ngày tải lên: 23/01/2014, 06:20

... accuracy and the inability to reject disturbances Adaptive control techniques,5 which include adaptive control with optimization, adaptive control with constraints, and geometric adaptive control, ... generation, forced vibrations and regenerative chatter, and tool condition mon-itoring and control, respectively The next section discusses burr and chip formation and cutting temperatures These ... Force response, nonlinear model-based force controller (From Landers, R.G., Supervisory Machining Control: A Design Approach Plus Force Control and Chatter Analysis Components, Ph.D dissertation,

Ngày tải lên: 23/01/2014, 06:20

... Forming Processes: Monitoring and Control 7.1 Introduction: Process and Control Objectives Process Control Issues • The Process: Material Diagram • The Machine Control Diagram 7.2 The Plant or ... process output) outside the control loop Further stages of control can be attempted by actual measurement of forces and displacements at the tool (material control) and direct measurement of the ... Process Control Process Resolution Enhancement 7.6 Direct Shape Feedback and Control 7.7 Summary 7.1 Introduction: Process and Control Objectives Forming of metallic materials is the process of choice

Ngày tải lên: 23/01/2014, 06:20

... 1Assembly and Welding Processes and Their Monitoring and Control 8.1 Assembly Processes Monitoring of KPCs • Monitoring of KCCs 8.2 Monitoring and Control of Resistance Welding Process Monitoring • Control ... Control 8.3 Monitoring and Control of Arc Welding Processes Modeling for Arc Length Control • Weld Bead Geometry Control • Weld Material Properties • Monitoring of Arc Welding and Laser Welding Assembly ... principal stages of process control involve modeling, sensing, and control (Cook et al., 1989; Kannatey-Asibu, Jr., 1997) At the core of feedback control are the process inputs and outputs The primary

Ngày tải lên: 23/01/2014, 06:20

... ability to understand and control and that there Thomas R Kurfess Georgia Institute of Technology 8596Ch10Frame Page 151 Monday, November 12, 2001 12:04 PM Trang 2 is nothing random or probabilistic ... relationships (From Dorf, R and Kusiak, A., Handbook of Design, FIGURE 10.7 Spindle error motion (From Dorf, R and Kusiak, A., Handbook of Design, Manufacturing, and Axial Motion Tilt Tilt Radial ... direction for a lathe (From Dorf, R and Kusiak, A., Handbook of Design, FIGURE 10.14 Fixed and rotating sensitive directions (From Dorf, R and Kusiak, A., Handbook of Design, Trang 11 move through

Ngày tải lên: 27/01/2014, 15:20

... and control of future space-based... C.H., and Chu, C.C., Active member control of a precision structure, Proceedings of the 30th AIAA/ASME/ASCE/AHS Structures, Structural Dynamics, and ... in addition to being simple and robust, the control law can be implemented in an analog controller, which performs better in microvibrations. 11.3 Active Tendon Control The use of cables ... Preumont, A., Achkire, Y., and Bossens, F., Active tendon control of large trusses, AIAA Journal, 38, 3, 493–498, March 2000 12 Preumont, A and Bossens, F., Active tendon control of vibration

Ngày tải lên: 27/01/2014, 15:20

... real damper control The control law determines a com-manded damper force It is transformed on the basis of actual damper velocity in the control unit into the specific commanded control current ... concept the control of both semi-active and active suspensions originates again in Karnopp’s work1 and was developed by many other authors (bibliographic references are in Sharp and Crolla4 and Elbeheiry5) ... and the vehicle body • Isolation of the vehicle body from forces generated by the roadway unevenness • Control of the contact forces between wheels and the road surface • Control of lateral and

Ngày tải lên: 27/01/2014, 15:20

... the variables and are not available, and the control parametersg and τ can be set only according to estimated values of and in practice Two methods to improve robustness of the control algorithm ... 1981a, 1981b and 1982; Zitek 1984), its usagefor control advantage is rare and limited to stability- and robustness-related issues (Youcef-Toumi et al 1990, 1991; Yang, 1991) The delayed control feedback ... all the structural parameters are perfectly known,and g and are calculated as per Equations (14.40) and (14.41) When the parameters andvary, these control parameters must be readjusted for tuning

Ngày tải lên: 27/01/2014, 15:20

... optimal control theory (Kwakernaak and Sivan, 1972); (2) for each set of the passive control parameters R and L, an optimal control exists with the corresponding minimized cost function, J, and control ... vibration control problem (Tsai and Wang, 1996), a random sequence was generated to compare the structure displacements and control efforts (voltages) of the uncontrolled, the active, and the active-passive ... elements and the active control law (Kahn and Wang, 1994, 1995; Tsai and Wang, 1996, 1999) This approach is to ensure that active and passive actions are configured in a systematic and integrated

Ngày tải lên: 27/01/2014, 15:20

... system model, control objectives, and the stability analysis (see Reference 1 or 2 for details), the control force is designed as follows: (16.9) where is a positive control gain and the auxiliary ... the free end-point of the beam, and denotes the boundary control input force 16.2.2 Model-Based Boundary Control Law The control objective is to design the boundary control force that drives the ... follows: The equivalent force control inputs and in (16.13) and (16.15) are related to the control (16.16) where , denote the web tension in the respective adjacent span and , denote the radii of

Ngày tải lên: 27/01/2014, 15:20

... In other words, by proper choice of materials and geometry, a grand challenge awaits the tensegritydesigner: How to control the electrical, thermal, and mechanical energy in a material or structure?For ... class of tensegrity structures and examines severalmembers of this class; Section 17.5 offers conclusions and future work The appendices explainnonlinear and linear analysis of planar tensegrity ... Thestiffness and strength of these structures are determined 17.1 Introduction Tensegrity structures are built of bars and strings attached to the ends of the bars The bars canresist compressive force and

Ngày tải lên: 27/01/2014, 15:20

... face tracking, and 3D face synthesissuch as text- and speech-driven face animation 2.3 Geometric-based facial motion modeling, analysis and synthesis Accurate face motion analysis and realistic ... techniques for 3D face geometry modeling, 3D facemotion modeling, 3D face motion tracking and animation Then it discusses aunified framework for face modeling, analysis and synthesis In this framework, ... animation demands goodmodel of the temporal and spatial facial deformation One type of approachesuse geometric-based models [Black and Yacoob, 1995, DeCarlo and Metaxas, 2000, Essa and Pentland, 1997,

Ngày tải lên: 13/02/2014, 16:20

... review and one-for-one inventory control policies and Poisson demand arrivals For review on general multi-echelon Trang 37A very important and simplifying consequence of a continuous review and ... wife, Sylvia, and our daughter, Diana, for their tremendous patience and fortitude in enduring my absence from home Their Trang 7ABSTRACT SERVICE PARTS LOGISTICS: MODELING, ANALYSIS AND APPLICATION ... demand needs to be satisfied immediately upon its arrival, and a non- emergency class, where a customer demand needs not to be satisfied until a due date Using both transient and steady state analysis

Ngày tải lên: 07/03/2014, 02:20

... 1110-2-1901Engineering and DesignSEEPAGE ANALYSIS AND CONTROL FOR DAMS 1 Purpose This manual presents the fundamental design principles and guidance concerning seepage considerations for design of new dams and ... sand (from Fenn171) b Effect of fines on bility of sand-gravel mixture(from Barber and Sawyer137) permea-Figure 2-12 Influence of type and amount of fines on permeability of concrete sand, sand-gravel ... FOR THE COMMANDER: WILLIAM D BROWN Colonel, Corps of Engineers Chief of Staff Trang 3ENGINEER MANUAL 30 September 1986EM 1110-2-1901ENGINEERING AND DESIGN SEEPAGE ANALYSIS AND CONTROL FOR DAMS

Ngày tải lên: 28/04/2014, 11:51

... construction procedure to be made early in theproject (Hallford 1983; Holland and Turner 1980; and Gerwick, Holland, andKomendant 1981) (7) Treatment at Top of Concrete Cutoff Wall As mentioned ... wall and the core of the dam (9) Instrumentation and Monitoring Whenever a concrete cutoff wall isused for control of underseepage, the initial filling of the reservoir must becontrolled and instrumentation ... Ratios for DamsFounded on Pervious Foundations(a) MaterialVery fine sand or siltFine to medium sandCoarse sand Fine gravel or sand and gravelCoarse gravel including cobbles Minimum Bligh'sCreep Ratio1815129

Ngày tải lên: 28/04/2014, 11:51

... Nonsmooth analysis and control theory / F.H Clarke p cm - (Graduate texts in mathematics ; Includes bibliographical references and index ISBN 0-387-98336-8 (hardcover : alk paper) 1 Control Theory ... irregular and nonlinear behavior: catastrophes, fractals, and chaos In recent years, nonsmooth analysis has come to play a role in functionalanalysis, optimization, optimal design, mechanics and plasticity, ... decomposition, and suppose S ⊆ X is closed, s ∈ S, and ζ ∈ N P (s) Write s = (s1, s2) and ζ = (ζ1, ζ2) according to the given decomposition, and define S1 = s 1: (s 1, s2 ∈ S, and similarly

Ngày tải lên: 09/06/2014, 20:59

... Figures 18.5, 18.6, and 18.7 where (18.30) and for i = 1, 2, …, n, j = 1, 2, …,m we have (18.31) For j = 1 we replace t 2ij with For j = m we replace t 6ij and t 7ij with where and i + n = i. ... × 25) = (36 × 75) ∗ (75 × 25). and the dimensions are (36 × 6) = (36 × 18) ∗ (18 × 6). and the dimensions are (36 × 24) = (36 × 36) ∗ (36 × 31) ∗ (31 × 24). The control inputs u αij are defined ... (18.21) and (18.22) into (18.24) yields the relationship between q and the independent variables t 5 , t 1 , r 1 , r 2 as follows: (18.27) To put (18.27) in a matrix form, define the matrices: and P II II II II II II II II 1 33 33 33 33 1 33 33 33 33 1 2 = − −             = − −             − ∆∆ 00 00 00 00 00 00 00 00 qrtttr qr qrttt 111 11 1 11...

Ngày tải lên: 18/10/2013, 09:15

... problems, increased reliability and improved thermal capacity are achieved. On the other hand, brushless motors require more complex and expensive control systems. Sensors and switching circuitry are ... cheap, robust, and reliable, and at the same time offer good torque characteristics. However, control of such motors is rather complicated. Advanced vector controllers are expensive and do not guarantee ... we also mention high stiffness and efficiency (0.75 to 0.85). The main drawbacks are heaviness and high price. Toothed rack -and- pinion transmission allows R/T and T/R transformation of motion....

Ngày tải lên: 25/10/2013, 13:15

... the command and control of a vector such as position or force is not enough to control the interaction between systems (dynamic networks). The controller must also be able to command and control ... impedance control is an augmentation of position control. The actions of the manipulator control and hardware and the interaction between a robot and its environment are described by network analysis. ... measurements, and a controller involving a PD regulator and robust control part. The purpose of the robust controller is to ensure that the control tracking error (i.e., the difference between target and...

Ngày tải lên: 29/10/2013, 20:15