Control System 面试题与答案
问题 16. Explain the concept of system stability in the time domain.
System stability in the time domain refers to the behavior of the system over time and its ability to return to a stable state after disturbances.
问题 17. What is a phase-lead compensator, and how does it improve system performance?
A phase-lead compensator is a type of controller that introduces phase lead to the system, improving stability margins and reducing settling time.
问题 18. Discuss the advantages and disadvantages of digital control systems over analog control systems.
Advantages of digital control systems include ease of implementation and flexibility, while disadvantages include potential issues with sampling and quantization.
问题 19. How does a lead-lag compensator improve the performance of a control system?
A lead-lag compensator combines the features of both phase lead and phase lag to optimize the system's transient and steady-state response, providing better overall performance.
问题 20. What is the significance of pole-zero cancellation in control system design?
Pole-zero cancellation is a technique used to improve system performance by strategically placing poles and zeros to eliminate unwanted dynamics and improve stability.
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