From an energy perspective, a mechatronic system can be separated into a relatively higher energy power portion that interacts with the physical world and a relatively low energy power p
Trang 1
with the load or physical environment In addition, we will look at the electronic components that are essential for modulating the necessary electrical energy
From an energy perspective, a mechatronic system can be separated into a relatively higher energy (power) portion that interacts with the physical world and a relatively low energy (power) portion that process the data, see Fig 20.1 Sensor and actuators are the interfacing devices that accomplish the tasks
of energy modulation and energy conversion Therefore, an actuator can be viewed as having the structure depicted in Fig 20.2 Typically, actuators are considered only as energy conversion devices However, with the proliferation of power electronics, we will take a more inclusive view of actuators that also includes power amplification An electrohydraulic linear actuator, see Fig 20.3, can also be similarly classified, where the spool valve is the power amplification/modulation block with spool position as the
FIGURE 20.1 Mechatronic system.
FIGURE 20.2 Actuator functional diagram.
FIGURE 20.3 Electrohydraulic and electromechanical actuators.
Physical Process
Operator Interface
High Power
Low Power
Physical Process
Physical Process
mixture of mechanical, fluid, thermal, chemical, electrical components/subsystems
Information Processing
Electronics, Software
Communication
Actuators
Power Modulation, Energy Conversion
Sensors
Energy Conversion, Signal Processing
Energy Conversion
Energy Conversion
Control Signal
Load Environment Actuator
Low Power High Power
Unmodulated energy source
Power Amplification
& Modulation
Energy Conversion
LOAD
+V
LOAD
Energy Conversion
Power Amplification
& Modulation
Low Energy
Control Signal
Ps
0066_Frame_C20 Page 2 Wednesday, January 9, 2002 5:41 PM
©2002 CRC Press LLC
Trang 2
with the load or physical environment In addition, we will look at the electronic components that are essential for modulating the necessary electrical energy
From an energy perspective, a mechatronic system can be separated into a relatively higher energy (power) portion that interacts with the physical world and a relatively low energy (power) portion that process the data, see Fig 20.1 Sensor and actuators are the interfacing devices that accomplish the tasks
of energy modulation and energy conversion Therefore, an actuator can be viewed as having the structure depicted in Fig 20.2 Typically, actuators are considered only as energy conversion devices However, with the proliferation of power electronics, we will take a more inclusive view of actuators that also includes power amplification An electrohydraulic linear actuator, see Fig 20.3, can also be similarly classified, where the spool valve is the power amplification/modulation block with spool position as the
FIGURE 20.1 Mechatronic system.
FIGURE 20.2 Actuator functional diagram.
FIGURE 20.3 Electrohydraulic and electromechanical actuators.
Physical Process
Operator Interface
High Power
Low Power
Physical Process
Physical Process
mixture of mechanical, fluid, thermal, chemical, electrical components/subsystems
Information Processing
Electronics, Software
Communication
Actuators
Power Modulation, Energy Conversion
Sensors
Energy Conversion, Signal Processing
Energy Conversion
Energy Conversion
Control Signal
Load Environment Actuator
Low Power High Power
Unmodulated energy source
Power Amplification
& Modulation
Energy Conversion
LOAD
+V
LOAD
Energy Conversion
Power Amplification
& Modulation
Low Energy
Control Signal
Ps
0066_Frame_C20 Page 2 Wednesday, January 9, 2002 5:41 PM
©2002 CRC Press LLC