measurement and control instrumentation error modeled performance

... any error exists between measurement and set point, the integral action will cause the output to begin to change and continue to change as long as the error ~ 24 FEEDBACK PROCESS CONTROL % MEASUREMENT ... standard that is compatible with other measurements and calculations To understand the pascal and its relationship to other units of pressure measurement, we must return to a basic understanding ... Characteristics and Controllability The automatic controller uses changes in the position of the final actuator to control the measurement signal, moving the actuator to oppose any change it sees in the measurement...

Ngày tải lên: 01/04/2014, 11:03

... the integration of structure and control design appears in Skelton1,2 and Grigoriadis et al.3 Bendsoe and others4-7 optimize structures by beginning with a solid brick and deleting finite elements ... 2, …, m} and {ρ11, t1ij, for i = 1, 2, …, n, j = 1, 2, …, m, and i < n when j = 1} This section discusses the relationship between the q variables and the string and rod vectors tαβγ and rβij ... tools were developed to integrate the design of the structure and the control Hence, in this modern era, the dynamics of the structure and control were not cooperating to the fullest extent possible...

Ngày tải lên: 18/10/2013, 09:15

... Ifft and Andrew J Zacharias, Measurements & Control, September, 1993 Dry Solids Flow Update, Auburn International Inc Flow Measurement Engineering Handbook, R.W Miller, McGraw-Hill, 1983 Flow Measurement ... Complete Flow and Level Measurement Handbook and Encyclopedia®, OMEGA Press, 1995 OMEGA Volume 29 Handbook & Encyclopedia, Purchasing Agents Edition, OMEGA Press, 1995 “Advanced Process Control for ... Complete Flow and Level Measurement Handbook and Encyclopedia®, OMEGA Press, 1995 OMEGA Volume 29 Handbook & Encyclopedia, Purchasing Agents Edition, OMEGA Press, 1995 “Choices Abound in Flow Measurement ,...

Ngày tải lên: 20/10/2013, 01:15

... 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 not guarantee ... Sections 21.3.1 and 21.3.2 The problem of control is strongly influenced by the choice of actuators For instance, DC motors, stepper motors, and hydraulic actuators require different hardware and software...

Ngày tải lên: 25/10/2013, 13:15

... octave-band analyzer is the most common analyzer for industrial noise measurements It separates complex sounds into frequency bands one octave in width, and measures the level in each of the bands ... machine octave-band sound pressure levels and background octave-band sound pressure levels is less than dB, the accuracy of the adjusted sound pressure levels will be decreased Valid measurements ... 24.12 MEASUREMENT OF MACHINE NOISE The noise produced by a machine may be evaluated in various ways, depending on the purpose of the measurement and the environmental conditions at the machine Measurements...

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 ... 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 ... on position control and requires position commands and measurements to close the feedback loop Force measurements are needed to effect the target impedance behavior Position/force control methods...

Ngày tải lên: 29/10/2013, 20:15

... is A11 and … and Xn is A1n, then Y = B11 and … and Ym = B1m R 2: if X1 is A21 and … and Xn is A2n, then Y = B21 and … Ym = B2m M R r: if X1 is Ar1 and … and Xn is Arn, then Y1 = Br1 and … and Ym ... described by a set of control rules: If (error is positive and error change is positive), then control change = negative Else if (error is positive and error change is negative), then control change ... control change = zero Else if (error is negative and error change is positive), then control change = zero Else if (error is negative and error change is negative), then control change = positive...

Ngày tải lên: 29/10/2013, 20:15

... 26.10) The control station consists of a TV monitor, and a control panel with joysticks and pushbutton commands Bi-directional radio links allow simultaneous transmission of Commands from the control ... very useful for system simulation and control 26.4 Control of Mobile Robots A variety of control systems with mobile robots are currently in use The simplest control systems were developed for ... ultrasonic-based range-finder mounted on a pan -and- tilt unit This unit is located on the front end of the chassis and constantly rotates left -and- right and up -and- down independently of the speed of the...

Ngày tải lên: 09/11/2013, 05:15

... Processes and Their Monitoring and Control 8.1 Assembly Processes 8.2 Monitoring and Control of Resistance Welding Process 8.3 Monitoring and Control of Arc Welding Processes References Control ... Monitoring and Control 6.5 Other Process Phenomena 6.6 Future Direction and Efforts Acknowledgments References Forming Processes: Monitoring and Control 7.1 Introduction: Process and Control Objectives ... Handbook of Formulas and Tables for Signal Processing, Alexander D Poularikas The Industrial Electronics Handbook, J David Irwin The Measurement, Instrumentation, and Sensors Handbook, John G Webster...

Ngày tải lên: 17/12/2013, 13:15

... designing, evaluating, and controlling production facilities They help meet performance requirements and cost and time constraints Suppliers can be selected on the basis of price and on their ability ... interconnected set of links and powered joints that support or move a wrist, a hand or an end effector • Wrist: a set of joints between the arm and the hand that allows the hand to be oriented to the ... high positioning accuracy for precise assembly, fast and vibration-free motion for short cycle times, and advanced control for path precision and controlled compliance Figure 28.11 shows the principle...

Ngày tải lên: 17/12/2013, 13:15

... meals, pharmaceuticals, and documents along normal corridors Clear and simple user interfaces, robust robot navigation, and ability to open doors and operate elevators by remote control make it a pioneering ... guidance and control (absolute motion control) • Sensorimotor primitives defined as encapsulations of perception and motion that form domain general blocks for fast task strategies (reactive motion control) ... Zeiss, Germany, consists of a weight-balanced servo-controlled six-DOF arm, a computer control, and a graphical workstation for visualization and programming It carries a surgical microscope Movements...

Ngày tải lên: 17/12/2013, 13:15

... Springer–Verlag, New York, 1997 Arbib, M.A and Liaw, J.S., Sensori-motor transformations in the world of frogs and robots, Artif Intelligence, 72, 53, 1995 Bogoni, L and Bajcsy, R., Functionality investigation ... using a discrete event system approach, Robotics and Autonomous Syst., 13, 173, 1994 Cutkosky, M.R., On grasp choice, grasp models, and the design of hands for manufacturing tasks, IEEE Trans Robotics ... Tokyo, 1993 Leondes, C.T (Ed.), Mechatronic System Techniques and Applications, Transportation and Vehicular Systems, Vol 2, Gordon and Breach, Amsterdam, 2000 Hirose, S., A code of conduct for...

Ngày tải lên: 17/12/2013, 13:15

... reduced costs and lead times in all engineering design stages, improved quality and accuracy, minimization of errors and their duplication, more efficient analysis tool, and accurate control and monitoring ... sequence of operations and process planning, control of the machines and monitoring of the processes (on/off line), automation, networking and communication systems, and quality control of the production ... manage, and control the operations of a manufacturing system: computer-aided manufacturing (CAM) (Bedworth, Handerson, and Wolfe, 1991) In CAM, computers are either used directly to control and monitor...

Ngày tải lên: 23/01/2014, 06:20

... types of control systems work concurrently In this presentation, we will focus on the discrete event control and neglect the interactions between discrete event controllers and the continuous controllers ... closed contacts, and commands The I1 and I5 are input signals from a clamp proximity switch and a pushbutton, respectively; the signals M1, M2, and M5 represent memory locations; and Q1 represents ... (((I1 and M1) or (I5 and M2)) and not M5) then Q1;” or equivalently “If the clamp is closed and the system is in auto mode, or the move button is pressed and the system is in manual mode, and there...

Ngày tải lên: 23/01/2014, 06:20

... Daneshmend, L K and Pak, H A., 1986, Model reference adaptive control of feed force in turning, ASME Journal of Dynamic Systems, Measurement, and Control, 108, 1, 215–222 49 Lauderbaugh, L K and Ulsoy, ... Systems, Measurement, and Control, 110, December, 350–354 51 Rober, S J and Shin, Y C., 1996, Control of cutting force for end milling processes using an extended model reference adaptive control ... Dynamic Systems, Measurement, and Control, 111, 1, 260–267 65 Furness, R J., Ulsoy, A G., and Wu, C L., 1996, Supervisory control of drilling, ASME Journal for Manufacturing Scientists and Engineers,...

Ngày tải lên: 23/01/2014, 06:20

... developments in the adaptive control of machine tools, ASME Journal of Dynamic Systems, Measurement, and Control, 105, 107, 1983 12 Landers, R G and Ulsoy A G., Machining force control including static, ... generation, forced vibrations and regenerative chatter, and tool condition monitoring and control, respectively The next section discusses burr and chip formation and cutting temperatures These ... mechanics and monitoring and control modules, but also the machine tool structure and servo mechanisms A comprehensive simulator will allow the designer to investigate process monitoring and control...

Ngày tải lên: 23/01/2014, 06:20

... servo control of machine variables from fully controlling the process output Such control does, however, greatly reduce the process variability, and with good production control of material and ... variations, press variations, and even machine controller variations (provided they are not entirely uncorrelated random signals) will be reflected in this measurement However, such measurements have yet ... Shape Part Shape - Shape Control Algorithm Reconfigurable Tool Workpiece 3D Shape Measurement FIGURE 7.15 Shape control system using a reconfigurable tool and spatial frequency controller Other forms...

Ngày tải lên: 23/01/2014, 06:20

... Tomizuka, M., and Langari, G., 1982, Modeling and adaptive control of arc-welding processes, Measurement and Control for Batch Manufacturing, Hardt, D E., ed., 65–75 Doumanidis, C., and Hardt, D.E., ... Overton, K., and Andrea, M D., 1991, Real-time adaptive spot welding control, Journal of Dynamic Systems, Measurement and Control Halmoy, E., 1979, Wire melting rate, droplet temperature, and effective ... DeVor, R.E., Chang, T., and Sutherland, J., 1992, Statistical Quality Design and Control, Contemporary Concepts and Methods, Macmillan, New York Dickinson, D W., Franklin, J E., and Stanya, A., 1980,...

Ngày tải lên: 23/01/2014, 06:20

... that one will be lucky and have a random error component reduce the overall system error Root mean square (RMS) error is often used to quantify random errors where the random errors tend to average ... undesired, treated as errors, and often referred to as kinematic errors.7 There are two straightness errors and three angular errors that must be considered for the slide and carriage system shown ... proper procedures, instrumentation and careful metrology, many errors can be identified, predicted and held within the desired level of the error budget 10.4.1.2 Dynamic Errors Dynamic errors are typically...

Ngày tải lên: 27/01/2014, 15:20

... (ii) active tendon, and (iii) generic interface In all cases, the same control architecture is used: a collocated piezoelectric actuator and force sensor connected by a local controller with an ... actuator and the force sensor It can, therefore, be regarded as a compound index of controllability and observability of mode i νi is readily available from commercial finite element programs and can ... that 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 to achieve...

Ngày tải lên: 27/01/2014, 15:20