Table 3 One of the eleven architectural styles for self-adaptive systems described in the catalog
Style #2 â P(ID) Feedback control with system identification | |
|---|---|
Summary | A separate component (controller) measures system output and acts accordingly to drive the system to the expected output (feedback) |
Components | System, controller, effector, sensor, transducer/QoS subsystem (optional, if output not directly delivered by the system itself) |
Connectors | (Remote) procedure call, event bus or data access |
Data elements | Reference value(s), input values, output values, transduced values (optional) |
Topology | Circular with one entry point: (reference input â controller â system â measured output [ â transducer/QoS subsystem] â...) |
Variants | #2.1: PID-SI with Precompensation - (PID-SI/PC) |
| Â | #2.2: PID-SI with Sensor Delay - (PID-SI/SD) |
| Â | #2.3: PID-SI with Filtering - (PID-SI/F) |
Qualities yielded | Reactive behavior; adaptation to unmodeled disturbances; no need for an accurate system model; can make stable an unstable system |
Typical uses | When a good enough system model is available, disturbance modeling is quite complicated, target system is unstable but linear or with identifiable linear operating regions |
Cautions | When disturbance spans over a wide range; when system is primary non-linear or have dynamics that are difficult to be modeled; when structural reconfiguration is needed |
Example | ... |