Feedback control of on/off pneumatic actuators

摘要

A surgical system having feedback control for pneumatic actuators includes a pneumatic pressure source and a vitrectomy cutter having a cutting mechanism, a first pneumatic input port, and a second pneumatic input port. A pneumatic actuator is configured to direct pneumatic pressure to one of the first and second pneumatic input ports. A first pressure transducer is located and configured to detect actual pressure at the first pneumatic input port, and a second pressure transducer is located and configured to detect actual pressure at the second pneumatic input port. A controller communicates with the first and second pressure transducers and the pneumatic actuator. It is configured to change the pneumatic actuator actuation timing based on the data communicated from the first and second pressure transducers.

主权项

1. A surgical system having feedback control for pneumatic actuators, comprising:
a pneumatic pressure source; a vitrectomy cutter having a cutting mechanism, a first pneumatic input port, and a second pneumatic input port; a pneumatic actuator configured to alternate pneumatic pressure to the first and second pneumatic input ports based on an actuator actuation timing; a first pressure transducer placed and configured to measure actual pressure at the first pneumatic input port; a second pressure transducer placed and configured to measure actual pressure at the second pneumatic input port; and a controller in communication with the first and second pressure transducers and the pneumatic actuator, the controller being configured to measure an actual length of time the measured actual pressure of the first pressure transducer is above a minimum pressure threshold and further configured to change the pneumatic actuator actuation timing based on comparing the actual length of time the measured actual pressure of the first pressure transducer is above the minimum pressure threshold to a desired length of time that the measured actual pressure is desired to be above the minimum pressure threshold.