Which type of control system would be least affected by non-linearities?

Linear control systems are characterized by their proportionality and additive properties, meaning their output is a linear function of their input. This inherent nature allows linear control systems to maintain consistent performance even when faced with variations in system dynamics or external disturbances. Non-linearities can cause systems to behave unpredictably, leading to issues like oscillations or instability. However, linear control systems are designed to operate within a defined range where they can approximate the desired linear behavior effectively. Thus, they are less susceptible to the detrimental effects of non-linear characteristics than the other types of control systems listed.

Digital control systems can exhibit non-linear characteristics depending on the algorithms used, while feedback control systems can also become non-linear based on the way feedback is implemented. Proportional control systems, while integral to many control configurations, may struggle with non-linearity as their behavior may change across different input levels, leading to performance issues.