Podcast
Questions and Answers
Which type of system does not correct for disturbances and is simply commanded by the input?
Which type of system does not correct for disturbances and is simply commanded by the input?
- Open-loop system (correct)
- Closed-loop system
- Transducer system
- Feedback control system
What is the controlled variable (output) of a toaster?
What is the controlled variable (output) of a toaster?
- Color of the toast (correct)
- Type of bread used
- Thickness of the toast
- Temperature of the toaster
What is the advantage of closed-loop systems over open-loop systems?
What is the advantage of closed-loop systems over open-loop systems?
- Lower cost
- Greater accuracy (correct)
- Simplicity
- Less sensitivity to noise
What is the process by which a system's performance is determined?
What is the process by which a system's performance is determined?
Which of the following is an example of an automatically controlled system mentioned in the text?
Which of the following is an example of an automatically controlled system mentioned in the text?
What is the purpose of a control system?
What is the purpose of a control system?
Which of the following is NOT an example of a control system mentioned in the text?
Which of the following is NOT an example of a control system mentioned in the text?
What does the model mentioned in the text predict?
What does the model mentioned in the text predict?
Which of the following is a major objective of systems analysis and design discussed in the text?
Which of the following is a major objective of systems analysis and design discussed in the text?
What is the importance of transient response in a control system?
What is the importance of transient response in a control system?
What is the steady-state response of a system?
What is the steady-state response of a system?
What happens if a control system does not have stability?
What happens if a control system does not have stability?
Which of the following is true about the transient response of an unstable system?
Which of the following is true about the transient response of an unstable system?
What is the main objective of control system analysis and design?
What is the main objective of control system analysis and design?
What are some important considerations in control system design?
What are some important considerations in control system design?
Why does the engineer want to create a robust design?
Why does the engineer want to create a robust design?
Which two major measures of performance are apparent in the elevator system described in the text?
Which two major measures of performance are apparent in the elevator system described in the text?
What are the four primary reasons for building control systems according to the text?
What are the four primary reasons for building control systems according to the text?
What is the distinguishing characteristic of an open-loop system according to the text?
What is the distinguishing characteristic of an open-loop system according to the text?
What is the purpose of an input transducer in a control system according to the text?
What is the purpose of an input transducer in a control system according to the text?
Which of the following is an advantage of control systems mentioned in the text?
Which of the following is an advantage of control systems mentioned in the text?
What are the two major measures of performance in the elevator system described in the text?
What are the two major measures of performance in the elevator system described in the text?
Which of the following is an example of a control system mentioned in the text?
Which of the following is an example of a control system mentioned in the text?
What is the distinguishing characteristic of an open-loop system according to the text?
What is the distinguishing characteristic of an open-loop system according to the text?
What is the purpose of an input transducer in a control system according to the text?
What is the purpose of an input transducer in a control system according to the text?
Why are control systems useful in remote or dangerous locations according to the text?
Why are control systems useful in remote or dangerous locations according to the text?
Which of the following is NOT an example of an automatically controlled system mentioned in the text?
Which of the following is NOT an example of an automatically controlled system mentioned in the text?
What is the purpose of a control system?
What is the purpose of a control system?
What is the distinguishing characteristic of a closed-loop system according to the text?
What is the distinguishing characteristic of a closed-loop system according to the text?
What is the main objective of control system analysis and design?
What is the main objective of control system analysis and design?
What are some important considerations in control system design?
What are some important considerations in control system design?
Which of the following is true about the transient response of a stable system?
Which of the following is true about the transient response of a stable system?
Which of the following is a major objective of control system analysis and design discussed in the text?
Which of the following is a major objective of control system analysis and design discussed in the text?
What is the purpose of an input transducer in a control system according to the text?
What is the purpose of an input transducer in a control system according to the text?
What is the significance of the natural response in a control system?
What is the significance of the natural response in a control system?
Which of the following is true about the transient response of an unstable system?
Which of the following is true about the transient response of an unstable system?
What is the consequence of a control system not having stability?
What is the consequence of a control system not having stability?
What is the primary concern regarding the steady-state response in a control system?
What is the primary concern regarding the steady-state response in a control system?
Which of the following is a disadvantage of open-loop systems mentioned in the text?
Which of the following is a disadvantage of open-loop systems mentioned in the text?
Which of the following is true about closed-loop systems mentioned in the text?
Which of the following is true about closed-loop systems mentioned in the text?
What is the purpose of an output transducer in a control system according to the text?
What is the purpose of an output transducer in a control system according to the text?
What is the result of the first summing junction in a closed-loop system according to the text?
What is the result of the first summing junction in a closed-loop system according to the text?
What is the actuating signal called in closed-loop systems according to the text?
What is the actuating signal called in closed-loop systems according to the text?
What is the main advantage of closed-loop systems over open-loop systems according to the text?
What is the main advantage of closed-loop systems over open-loop systems according to the text?
Which of the following is NOT a consideration in control system design, according to the text?
Which of the following is NOT a consideration in control system design, according to the text?
What is the purpose of a robust design in control systems, according to the text?
What is the purpose of a robust design in control systems, according to the text?
Which of the following statements about parameter changes in control systems is true, according to the text?
Which of the following statements about parameter changes in control systems is true, according to the text?
What is the main characteristic of an unstable system, according to the text?
What is the main characteristic of an unstable system, according to the text?
What is the relationship between the transient response and the natural response of a system, according to the text?
What is the relationship between the transient response and the natural response of a system, according to the text?
What is the purpose of stability in control system design, according to the text?
What is the purpose of stability in control system design, according to the text?
What is the power transmission medium in hydraulic systems?
What is the power transmission medium in hydraulic systems?
What are electrohydraulic (EH) systems controlled by?
What are electrohydraulic (EH) systems controlled by?
What are hydro-mechanical systems controlled by?
What are hydro-mechanical systems controlled by?
What component controls the flow of pressurized fluid in an electrohydraulic system?
What component controls the flow of pressurized fluid in an electrohydraulic system?
What connects the operator input devices to sensors in electronically controlled hydraulic systems?
What connects the operator input devices to sensors in electronically controlled hydraulic systems?
What is the purpose of accumulators in hydraulic systems?
What is the purpose of accumulators in hydraulic systems?
What are the three most important specifications for a hydraulic filter?
What are the three most important specifications for a hydraulic filter?
In a hydraulic system where the source of power is a fixed displacement gear type pump, how is the flow to the cylinder controlled?
In a hydraulic system where the source of power is a fixed displacement gear type pump, how is the flow to the cylinder controlled?
In a multi-function hydraulic power-based motion system, how are the hydraulic valve-actuator pairs connected to the pump and tank lines?
In a multi-function hydraulic power-based motion system, how are the hydraulic valve-actuator pairs connected to the pump and tank lines?
In a hydraulic circuit for the motion of a cylinder of an excavator, what is the power source?
In a hydraulic circuit for the motion of a cylinder of an excavator, what is the power source?
In a multi-function hydraulic power-based motion system, what type of connection may be used when it is not practical to provide a large enough pump to support the full load of each circuit?
In a multi-function hydraulic power-based motion system, what type of connection may be used when it is not practical to provide a large enough pump to support the full load of each circuit?
In a hydraulic circuit for the motion of a rotary hydraulic motor for a service truck, how is the speed of the hydraulic motor controlled?
In a hydraulic circuit for the motion of a rotary hydraulic motor for a service truck, how is the speed of the hydraulic motor controlled?
What is the primary purpose of proportional flow control valves in hydraulic systems?
What is the primary purpose of proportional flow control valves in hydraulic systems?
What is the main function of the hydraulic reservoir in a hydraulic power supply unit?
What is the main function of the hydraulic reservoir in a hydraulic power supply unit?
What is the crucial function of the hydraulic pump in hydraulic power transmission?
What is the crucial function of the hydraulic pump in hydraulic power transmission?
In industrial applications, what is commonly used to power the hydraulic pump?
In industrial applications, what is commonly used to power the hydraulic pump?
What are the two major designs of hydraulic power unit mentioned in the text?
What are the two major designs of hydraulic power unit mentioned in the text?
What type of actuators can be found in hydraulic motion systems?
What type of actuators can be found in hydraulic motion systems?
What is the purpose of safety relief valves in hydraulic circuits?
What is the purpose of safety relief valves in hydraulic circuits?
What is the main function of ON/OFF valves in hydraulic systems?
What is the main function of ON/OFF valves in hydraulic systems?
What is the role of accumulators in hydraulic motion control systems?
What is the role of accumulators in hydraulic motion control systems?
What type of gas is used in hydro-pneumatic accumulators?
What type of gas is used in hydro-pneumatic accumulators?
What is the purpose of filtration in hydraulic systems?
What is the purpose of filtration in hydraulic systems?
What is the advantage of using ON/OFF valves in parallel for finite speed or force control?
What is the advantage of using ON/OFF valves in parallel for finite speed or force control?
What is the purpose of identifying sensors in hydraulic circuit diagrams?
What is the purpose of identifying sensors in hydraulic circuit diagrams?
What is involved in the design of an electro-hydraulic motion control system?
What is involved in the design of an electro-hydraulic motion control system?
What are the measured variables in an electro-hydraulic system for control purposes?
What are the measured variables in an electro-hydraulic system for control purposes?
What is the primary concern in the design of electro-hydraulic motion control systems?
What is the primary concern in the design of electro-hydraulic motion control systems?
Why is it important to identify the main power supply and actuators in hydraulic circuit diagrams?
Why is it important to identify the main power supply and actuators in hydraulic circuit diagrams?
What is the significance of flow control valves in hydraulic circuit diagrams?
What is the significance of flow control valves in hydraulic circuit diagrams?
Study Notes
Interpreting Hydraulic Circuit Diagrams
- Hydraulic circuit diagrams show connections between hydraulic, mechanical, and electrical components using lines and standard symbols.
- It takes multiple days to fully understand a given hydraulic circuit.
- Guidelines for interpreting hydraulic circuit diagrams include identifying the main power supply and actuators, flow control valves, safety valves, power flow paths, pilot control circuits, and operator command signal sources.
- It is important to identify sensors and the logic used in control decisions, as well as any built-in priority and over-ride type logic in the circuit.
- The design of an electro-hydraulic motion control system involves specifying requirements, system concept design, component sizing and selection, control algorithm design, modeling and simulation, and hardware testing.
- Measured variables in an electro-hydraulic system for control purposes include load position and speed, load pressure, load force or torque, spool displacement, flow rate, pump output pressure, pump displacement, and pump speed.
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Description
Test your knowledge on open-loop systems and their characteristics with this quiz. Learn about how open-loop systems are controlled by input without correcting for disturbances. Find out how toasters are a prime example of open-loop systems and their controlled variables. Challenge yourself with questions on the topic and expand your understanding of system control.
