Control System ​

4 Feedback Control System Characteristics ​

4.1 Introduction 257 ​

4.2 Error Signal Analysis 259 ​

4.3 Sensitivity of Control Systems to Parameter Variations 261 ​

4.4 Disturbance Signals in a Feedback Control System 264 ​

4.5 Control of the Transient Response 269 ​

4.6 Steady-State Error 272 ​

4.7 The Cost of Feedback 274 ​

4.8 Design Examples 275 ​

4.9 Control System Characteristics Using Control Design Software 285 ​

4.10 Sequential Design Example: Disk Drive Read System 291 ​

4.11 Summary 295 ​

5 The Performance of Feedback Control System ​

6 The Stability of Linear Feedback System ​

7 The Root Locus Method ​

8 Frequency Response Methods ​

9 Stability in the Frequency Domain ​

9.1 Introduction 623 ​

9.2 Mapping Contours in the s-Plane ​

9.3 The Nyquist Criterion 630 ​

9.4 Relative Stability and the Nyquist Criterion 641 ​

9.5 Time-Domain Performance Criteria in the Frequency Domain 648 ​

9.6 System Bandwidth 655 ​

9.7 The Stability of Control Systems with Time Delays 655 ​

9.8 Design Examples 659 ​

9.9 PID Controllers in the Frequency Domain 677 ​

9.10 Stability in the Frequency Domain Using Control Design Software 678 ​

9.11 Sequential Design Example: Disk Drive Read System 686 ​

9.12 Summary 689 ​

13 Digital Control System ​

13.1 Introduction 946 ​

13.2 Digital Computer Control System Applications 946 ​

13.3 Sampled-Data Systems 948 ​

13.4 The z-Transform 951 ​

13.5 Closed-Loop Feedback Sampled-Data Systems 955 ​

13.6 Performance of a Sampled-Data, Second-Order System 959 ​

13.7 Closed-Loop Systems with Digital Computer Compensation 961 ​

13.8 The Root Locus of Digital Control Systems 964 ​

13.9 Implementation of Digital Controllers 968 ​

13.10 Design Examples 968 ​

13.11 Digital Control Systems Using Control Design Software 977 ​

13.12 Sequential Design Example: Disk Drive Read System 982 ​

13.13 Summary 984 ​