Podcast
Questions and Answers
What does the blue line in the Torque vs Speed graph represent?
What does the blue line in the Torque vs Speed graph represent?
In a closed-loop control system, what is the purpose of feedback?
In a closed-loop control system, what is the purpose of feedback?
What happens in a bang-bang closed-loop system when Tactual is greater than Td?
What happens in a bang-bang closed-loop system when Tactual is greater than Td?
What does the term 'steady state error' refer to in a bang-bang control system?
What does the term 'steady state error' refer to in a bang-bang control system?
Signup and view all the answers
What is the main function of the 'Adjusted Command' in a closed-loop control system?
What is the main function of the 'Adjusted Command' in a closed-loop control system?
Signup and view all the answers
In the Torque vs Speed graph, what is the relationship between torque and speed?
In the Torque vs Speed graph, what is the relationship between torque and speed?
Signup and view all the answers
Which type of control uses sensors to provide continuous adjustments to the system's operation?
Which type of control uses sensors to provide continuous adjustments to the system's operation?
Signup and view all the answers
What illustrates the process of system oscillation in the temperature control of a thermostat?
What illustrates the process of system oscillation in the temperature control of a thermostat?
Signup and view all the answers
What does the 'P' term in a response shaping control system primarily affect?
What does the 'P' term in a response shaping control system primarily affect?
Signup and view all the answers
Which condition will cause the left actuator (L) to be ON according to the angle control logic?
Which condition will cause the left actuator (L) to be ON according to the angle control logic?
Signup and view all the answers
In a PID controller, which term is responsible for correcting steady-state error?
In a PID controller, which term is responsible for correcting steady-state error?
Signup and view all the answers
If the steady-state error is indicated as ess(t) = ωd - ωact, which variable represents the desired output?
If the steady-state error is indicated as ess(t) = ωd - ωact, which variable represents the desired output?
Signup and view all the answers
What does the 'D' term in a response shaping control system primarily improve?
What does the 'D' term in a response shaping control system primarily improve?
Signup and view all the answers
What effect does increasing Kp2 above Kp1 have on the system response?
What effect does increasing Kp2 above Kp1 have on the system response?
Signup and view all the answers
Which of the following statements is true regarding ω0 in the context of response shaping?
Which of the following statements is true regarding ω0 in the context of response shaping?
Signup and view all the answers
In a feedback loop diagram, which component is primarily responsible for adjusting the system based on the error signal?
In a feedback loop diagram, which component is primarily responsible for adjusting the system based on the error signal?
Signup and view all the answers
Study Notes
Open Loop Control System - Input vs Output
-
Torque and Speed are inversely proportional
-
Current is directly proportional to Torque, linearly increasing with Torque
-
Speed decreases linearly with Torque
-
Speed and Torque both are low at the intersection point of Speed and Current lines
-
Current acts as an input for the motor to achieve Torque
Closed Loop Control System
-
Uses feedback or sensors to adjust the input command to operate the system
-
Desired output is compared against the Actual output
-
e(t) the difference between Desired and Actual output is used to adjust the input command
-
e(t) is called **Error signal ** or Error
-
Adjusted Command is a function of the error signal e(t)
-
Actual output gets closer to the Desired output through Tuning of the system
-
Closed-loop control is a continuous process and runs continuously, the loop can cycle as fast as the components allow
Bang-Bang Closed Loop Control System
- A system where the input can be either on or off
- The simplest form of temperature control
- Heater is ON if the Actual temperature is lower than the Desired temperature
- Heater is OFF if the Actual Temperature is higher than the Desired Temperature
- Temperature (T) always oscillates around the Steady State error region
- Home Thermostat is an example of a Bang-Bang closed-loop control system with a Step Command
- Spacecraft Reaction Control System (RCS) is a Bang-Bang closed-loop control system for attitude control
Response Shaping
-
P, I, and D terms are used to shape the response of a feedback control system
-
Magnitude of response is primarily controlled by P term
-
Speed of response is primarily controlled by D term
-
Steady state error is primarily controlled by I term
-
Overshoot is measured relative to the Steady State Value, not the Desired Value
-
Rise time is the time it takes for the output to reach **98% ** of its final value
-
Settling time is the time it takes for the output to settle within **2% ** of its final value
-
PI controllers have both P and I terms, leading to more efficient response than only P term
-
PID controllers have all P, I, and D terms and provide the best response control, by combining the advantages of P, I, and D terms
-
Kp is the proportional gain
-
KI is the integral gain
-
Kd is the derivative gain
-
Proportional Gain (Kp) affects the Magnitude of the response
-
Integral Gain (KI) affects the Steady State Error
-
Derivative Gain (Kd) affects the Speed of the response
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Related Documents
Description
This quiz covers the fundamental concepts of open loop and closed loop control systems. It discusses the relationships between torque, speed, and current, and explores the role of feedback in closed loop systems. Test your understanding of these essential engineering principles.
