What is the purpose of a "setpoint ramp" in control systems?

A setpoint ramp is designed to gradually adjust the setpoint over time rather than making abrupt changes. This gradual adjustment is crucial in control systems, as it helps to avoid sudden spikes or drops in system output that could lead to instability or oscillation. By ramping the setpoint, the system can adapt smoothly to the new target value, which allows the control mechanisms to respond effectively without overwhelming the system. This technique is particularly useful in processes where sudden changes can cause physical stress or instability.

In the context of control systems, gradual changes are often essential for maintaining operational safety and efficiency, especially in processes that involve thermal dynamics or mechanical systems where sudden shifts could cause damage or inefficiencies. The use of a setpoint ramp also aids in achieving better control performance over time, as it allows the system to settle into the new setpoint more smoothly.