servo responseThe servo-response mainly refers to the fast and accurate response ability of the servo-motor to the input command or control signal. It reflects the speed and precision of the servo-motor in the control system. It is a key performance index in the servo-system, which directly affects the dynamic performance of the system and the precision of motion control.
The factors that affect the servo-response are as follows:
1. ** Band **: The band width of the servo-motor system indicates the frequency response range of the system to the input signal. The higher the band width, the stronger the system's response to high-frequency input signals, allowing the servo-motor to track commands faster.
2. ** Controller response time **: The response time of the controller refers to the time from receiving the command to producing the corresponding output. The shorter the response time, the faster the response of the servo-motor to the input command.
3. ** inertia of the motor **: The inertia of the motor is related to its mass and geometry. The smaller inertia meant that the motor could accelerate and decelerate more easily, which improved the response speed of the system.
4. ** Control system's sample rate **: The control system's sample rate refers to the frequency at which the controller samples the feedback signal and command signal. A higher sample rate helped to more accurately monitor the state of the motor and improve the system's response.
5. ** Closed-loop control algorithm **: The closed-loop control system uses feedback to adjust the behavior of the motor. The use of advanced closed-loop control algorithms, such as model prediction control (PAC) or self-adapting control, could improve the system's ability to respond quickly to changes.
In some typical application fields, such as numerical control machine tools, printing equipment, robots, medical equipment, etc., high precision, high speed, high acceleration and other characteristics were required. At this time, the response of the servo-motor was crucial.
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servo-state machineThe servo-state machine involved the different state transformations during the operation of the servo-motor. For example, when MC_MoveVelocityis running, the state machine is in the state of ContinuousMotionand when MC_Halt axis decelerates and stops, the axis state will switch to the DiscreteMotionstate. After the stop is completed, the axis state will automatically switch to the StandStill state. When MC_MoveVelocityis running, the state machine is in the state of ContinuousMotionand after MC_Stop is executed, the axis state will switch to Stopping and remain there until the axis completely stops and MC_Stop's Execute is set to False, then the axis state will switch back to the StandStill state. During MC_Halt, the axis state is Discrete Motion, and new motions can be started at any time. During MC_Stop and before MC_Stop's Execute is reset to False, the axis state is Stopping, and new motions cannot be started.
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What does the servo-state mean?The servo-state refers to the various working conditions of the servo-system (such as the servo-motor and its related drives, controllers, etc.) during operation. For example, it may include the operation of the servo-motor (such as the state during normal operation, stop, and start), whether it is ready to operate (such as the presence or absence of the servo-ready signal), whether it is faulty (such as the state indicated by the driver alarm signal), and the performance during operation (such as whether there is vibration, whether the moment is normal, whether the speed is stable, etc.). This status information helps to determine whether the servo-system is working properly, so that problems can be found in time for adjustment or maintenance.
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