Fpaa Solutions For Pid Control
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Anadigm® FPAA Solutions for PID Control
Customer Presentation August 2002
PID Control Customer Presentation
PR080200-0004 August 2002 - page 1
PID Control - Agenda
z z
z
Basics of PID Control Implementing PID Controller using Anadigm® FPAA The Anadigm® Advantage
PID Control Customer Presentation
PR080200-0004 August 2002 - page 2
Typical Closed Feedback Control Loop
Error Signal
Output Control
LOOP CONTROLLER
Setpoint
Measurement
Signal Conditioning
PLANT Sensor
PID Control Customer Presentation
PR080200-0004 August 2002 - page 3
Basic Interactive PID Controller Function
LOOP CONTROLLER
Error
Output
Integral e = error signal
Proportional
SUM
Derivative
de Output = P e + I ∫ e.dt + D dt Where P = gain, I = integral or Reset and D = Derivative or Rate
PID Control Customer Presentation
PR080200-0004 August 2002 - page 4
Basics of PID z
z
z
Most industrial controllers are some form of PID controllers
P Proportional
I
D Derivative
Integral
PID Controller
P Applies GAIN to the error signal
I
D Applies differentiation (or RATE) to the error signal
Applies integration (or RESET) to the error signal
The PID Controller
P,I,D Parameters are set according to system characteristics and the response characteristics desired
Works to reduce the error signal to zero
PID Control Customer Presentation
PR080200-0004 August 2002 - page 5
Implementing PID Control – Using FPAA z
Temperature control (industrial oven) with the Anadigm® FPAA
z
Fluid tank level control with the Anadigm® FPAA
z
An example of a P (Proportional ONLY) controller An example of a PI (Proportional-Integral) controller
Implementing ‘dynamic’ backup control using the AN220E04
An example utilizing the reconfiguration capability of the Anadigm® FPAA solution
PID Control Customer Presentation
PR080200-0004 August 2002 - page 6
Thermister/RTD
Signal Linearizer
Amplification
Temperature Control (Industrial Oven)
Measurement
AN220E04
Error
CONTROLLER INDUSTRIAL OVEN
Proportional
CONTROL OUTPUT
ON-OFF Heat Source
AN220E04 Setpoint
Temperature Set Point
PID Control Customer Presentation
PR080200-0004 August 2002 - page 7
Implementing Temperature Control Thermistor/RTD Output
Input Chopper Amplifier Scales up the small thermocouple voltage
Setpoint
Transfer Function CAM
Sum-Diff CAM
Linearizes the voltage
Scales the voltage: –3V to +3V
Sum-Diff CAM
Temperature Set Point
measurement
Generates the error voltage
Gain Half CAM
Hysteresis comparator prevents the heat source from continually flip-flopping on and off
Control Output
Comparator CAM
Acts as a proportional controller
PID Control Customer Presentation
AN220E04
PR080200-0004 August 2002 - page 8
Implementing Temperature Control
Input Chopper Amp Sensor Input Signal conditioning & linearization
Setpoint
Measurement
Proportional Controller Gain Stage SP
Hysterisis Comparator
Control Output
Error
PID Control Customer Presentation
PR080200-0004 August 2002 - page 9
Simulated Oven Controller Output Graph of Oven Output Controlled by AN220E04 (simulated) 300
Degrees (F)
250 200 Oven Temperature
150
Set
Desired Temperature
100 50 0 0
20
40
60
80
100
120
Time (minutes)
After reaching 250 degrees the oven over shoots to the top end of its range of +- 18 degrees. This range can be changed by changing the gain of the half cycle gain stage
PID Control Customer Presentation
PR080200-0004 August 2002 - page 10
Fluid Tank Level Control
Level Sensor
Output Control
AN220E04
Proportional
Measurement
Error
Filler Valve
INTERFACE CIRCUIT
PLANT
Integral
SUM
Set Point
AN220E04
Level Control Dial
PID Control Customer Presentation
PR080200-0004 August 2002 - page 11
Implementing Fluid Tank Level Control
Sum-Diff CAM (Proportional Error Signal)
Sum-Diff CAM
Integrator CAM
Sample/Hold CAM
PID Control Customer Presentation
PR080200-0004 August 2002 - page 12
‘Dynamic’ Backup Control System
Advanced control computer
L NA G I S OL R T N a dat CO n tio nta e rum t s n I
Transmitter/instrument interface with AN220E04 chip
Wireless cell phone connection
Process
PID Control Customer Presentation
PR080200-0004 August 2002 - page 13
‘Dynamic’ Backup Control System
Advanced control computer
PI Control Transmitter/instrument interface with AN220E04 chip
Wireless cell phone connection
Process
PID Control Customer Presentation
PR080200-0004 August 2002 - page 14
The Anadigm® Advantage z
Software Design Environment
z
Anadigm® FPAA Platform
z
Intuitive, easy-to-use Rapid prototype and test Adaptive silicon characteristics allows for the tuning of the control system characteristics – even in real time Allows for more precise control since the entire control system is implemented within a temperature compensated, drift-free analog silicon platform Addresses high-speed, real-time closed loop control systems since the signal processing is entirely in the analog domain
Dynamic Reconfiguration
Allows for innovative approach to control system design Adjust the control system parameters ‘on-the-fly’ to maintain system operation despite environmental changes, component aging and disruptive events
PID Control Customer Presentation
PR080200-0004 August 2002 - page 15
Customer Presentation August 2002
PID Control Customer Presentation
PR080200-0004 August 2002 - page 1
PID Control - Agenda
z z
z
Basics of PID Control Implementing PID Controller using Anadigm® FPAA The Anadigm® Advantage
PID Control Customer Presentation
PR080200-0004 August 2002 - page 2
Typical Closed Feedback Control Loop
Error Signal
Output Control
LOOP CONTROLLER
Setpoint
Measurement
Signal Conditioning
PLANT Sensor
PID Control Customer Presentation
PR080200-0004 August 2002 - page 3
Basic Interactive PID Controller Function
LOOP CONTROLLER
Error
Output
Integral e = error signal
Proportional
SUM
Derivative
de Output = P e + I ∫ e.dt + D dt Where P = gain, I = integral or Reset and D = Derivative or Rate
PID Control Customer Presentation
PR080200-0004 August 2002 - page 4
Basics of PID z
z
z
Most industrial controllers are some form of PID controllers
P Proportional
I
D Derivative
Integral
PID Controller
P Applies GAIN to the error signal
I
D Applies differentiation (or RATE) to the error signal
Applies integration (or RESET) to the error signal
The PID Controller
P,I,D Parameters are set according to system characteristics and the response characteristics desired
Works to reduce the error signal to zero
PID Control Customer Presentation
PR080200-0004 August 2002 - page 5
Implementing PID Control – Using FPAA z
Temperature control (industrial oven) with the Anadigm® FPAA
z
Fluid tank level control with the Anadigm® FPAA
z
An example of a P (Proportional ONLY) controller An example of a PI (Proportional-Integral) controller
Implementing ‘dynamic’ backup control using the AN220E04
An example utilizing the reconfiguration capability of the Anadigm® FPAA solution
PID Control Customer Presentation
PR080200-0004 August 2002 - page 6
Thermister/RTD
Signal Linearizer
Amplification
Temperature Control (Industrial Oven)
Measurement
AN220E04
Error
CONTROLLER INDUSTRIAL OVEN
Proportional
CONTROL OUTPUT
ON-OFF Heat Source
AN220E04 Setpoint
Temperature Set Point
PID Control Customer Presentation
PR080200-0004 August 2002 - page 7
Implementing Temperature Control Thermistor/RTD Output
Input Chopper Amplifier Scales up the small thermocouple voltage
Setpoint
Transfer Function CAM
Sum-Diff CAM
Linearizes the voltage
Scales the voltage: –3V to +3V
Sum-Diff CAM
Temperature Set Point
measurement
Generates the error voltage
Gain Half CAM
Hysteresis comparator prevents the heat source from continually flip-flopping on and off
Control Output
Comparator CAM
Acts as a proportional controller
PID Control Customer Presentation
AN220E04
PR080200-0004 August 2002 - page 8
Implementing Temperature Control
Input Chopper Amp Sensor Input Signal conditioning & linearization
Setpoint
Measurement
Proportional Controller Gain Stage SP
Hysterisis Comparator
Control Output
Error
PID Control Customer Presentation
PR080200-0004 August 2002 - page 9
Simulated Oven Controller Output Graph of Oven Output Controlled by AN220E04 (simulated) 300
Degrees (F)
250 200 Oven Temperature
150
Set
Desired Temperature
100 50 0 0
20
40
60
80
100
120
Time (minutes)
After reaching 250 degrees the oven over shoots to the top end of its range of +- 18 degrees. This range can be changed by changing the gain of the half cycle gain stage
PID Control Customer Presentation
PR080200-0004 August 2002 - page 10
Fluid Tank Level Control
Level Sensor
Output Control
AN220E04
Proportional
Measurement
Error
Filler Valve
INTERFACE CIRCUIT
PLANT
Integral
SUM
Set Point
AN220E04
Level Control Dial
PID Control Customer Presentation
PR080200-0004 August 2002 - page 11
Implementing Fluid Tank Level Control
Sum-Diff CAM (Proportional Error Signal)
Sum-Diff CAM
Integrator CAM
Sample/Hold CAM
PID Control Customer Presentation
PR080200-0004 August 2002 - page 12
‘Dynamic’ Backup Control System
Advanced control computer
L NA G I S OL R T N a dat CO n tio nta e rum t s n I
Transmitter/instrument interface with AN220E04 chip
Wireless cell phone connection
Process
PID Control Customer Presentation
PR080200-0004 August 2002 - page 13
‘Dynamic’ Backup Control System
Advanced control computer
PI Control Transmitter/instrument interface with AN220E04 chip
Wireless cell phone connection
Process
PID Control Customer Presentation
PR080200-0004 August 2002 - page 14
The Anadigm® Advantage z
Software Design Environment
z
Anadigm® FPAA Platform
z
Intuitive, easy-to-use Rapid prototype and test Adaptive silicon characteristics allows for the tuning of the control system characteristics – even in real time Allows for more precise control since the entire control system is implemented within a temperature compensated, drift-free analog silicon platform Addresses high-speed, real-time closed loop control systems since the signal processing is entirely in the analog domain
Dynamic Reconfiguration
Allows for innovative approach to control system design Adjust the control system parameters ‘on-the-fly’ to maintain system operation despite environmental changes, component aging and disruptive events
PID Control Customer Presentation
PR080200-0004 August 2002 - page 15
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