Tài liệu Automatic control for Commercial building pptx

... in digital form, the controllers perform what is known as direct digital control (DDC). Microprocessor-based controllers can be used as stand-alone controllers or they can be used as controllers incorporated ... microprocessor-based controllers used in commercial buildings. These controllers measure signals from sensors, perform control routines in software programs, and take corrective...

Ngày tải lên: 12/12/2013, 04:15

... amount of controlled variable required by the controller. Proportional control, two-position control, and floating control have different operating limitations. For example: 1. In modulating control, ... Series 90 controller with an actuator usable for proportioning action. Limit controls can also be added. EQUIPMENT CONTROLLERS –Temperature controllers. – Humidity controllers. –Pres...

Ngày tải lên: 24/01/2014, 23:20

... OF AUTOMATIC CONTROL CONTROL FUNDAMENTALS 17 Fig. 20. Comparison of Analog and Digital Control Signals. CONTROL MODES Control systems use different control modes to accomplish their purposes. Control ... 17 Basic Two-Position Control 17 Timed Two-Position Control 18 Step Control 19 Floating Control 20 Proportional Control 21 General 21 Compensation Control 22 Proport...

Ngày tải lên: 25/10/2013, 13:15

... control system, and indicating devices to facilitate monitoring of control system activity. ENGINEERING MANUAL OF AUTOMATIC CONTROL CONTROL FUNDAMENTALS 35 CHARACTERISTICS AND ATTRIBUTES OF CONTROL ... cost, and reliable actuators for large valves and dampers Simplest modulating control Most common for simple on-off control Integral sensor/ controller Simple sequence of con...

Ngày tải lên: 25/10/2013, 13:15

... a challenge for business and technology executives. The former type of risk is somewhat more recurring, predictable and perhaps controllable, and, therefore, the business case for investment ... management more than ever before. Business risks can be both internal to the firm, such as rolling out an inadequately tested system, as well as environmental, in the form of an unanticipated...

Ngày tải lên: 10/12/2013, 01:15

... catfish feed in vitro di ib in vivo l Field farming Crude enz yme Commercial Protease Mixtu re A Bi commercial Alpha amilase commercial Phytase ivity digestib ivity culture farming y extract ... 600gwerecollected. Compounded pellet feed were used for feeding only and routinely fed on 3 times per day.  Tra catfish previously starved for 12 hours before digestive tract remov...

Ngày tải lên: 10/12/2013, 04:15

... ít. Twenty-five dollars is too much for the meal. Fifty minutes isn’t enough time to finish this test Twenty dollars is all I can afford to pay for that radio. Two miles is too much ... than I did last week. He has less time now than he had before. This magainze is better than that one. He acts worse now than ever before. Lưu ý: farther dùng cho khoảng cách; further dùn...

Ngày tải lên: 13/12/2013, 18:15

... reconstruction algorithm, for performing that task. In the numerical observer approach [11, 16, 17], a task-specific FOM is computed for each image. Based on the FOMs for all the images produced ... Fourier transform is the same as taking the Radon transform and then applying the Fourier transform with respect to the first variable” [1]. The method was first proposed in [5] and the reason...

Ngày tải lên: 16/12/2013, 04:15

Ngày tải lên: 17/12/2013, 14:15

... MEMS Sensors for Biomedical Applications Yu-Chong Tai Professor of EE Member of NSF/CNSE California Institute of Technology (NSF/ERC Industry Day, May ... nanometers to millimeters. Other Names Monocytes/Field Monocyte Monocyte Attachment Attachment Control Ox-PAPC Ox-PAPC + High slew Rate Ox-PAPC + Low Slew Rate Ox-PAPC + Oscillating Flow Other ... Recording 012345678910 54 36 18 0 -1...

Ngày tải lên: 22/12/2013, 21:17