What should be done to understand the behavior of a servo valve in a control system?

Using a schematic is essential to understanding the behavior of a servo valve in a control system because it provides a detailed representation of how the system components are interconnected and how they function together. A schematic diagram outlines the configuration of the hydraulic or pneumatic circuit, illustrating the paths of fluid flow, the components involved, and control signals.

By studying the schematic, one can identify the role of the servo valve, including its input and output connections, as well as how it interacts with other system components such as actuators, pumps, and sensors. This understanding is critical for diagnosing issues, optimizing performance, and making informed adjustments to the control parameters.

While other options like installing a tachometer, analyzing flow rates, or observing the system in manual mode may provide additional insights or data about the performance of the servo valve, they do not offer the comprehensive overview and systematic understanding that a schematic provides. Therefore, analyzing the schematic is the most effective way to gain a complete understanding of the servo valve's behavior within the overall control system.