Control method of gas pressure actuator and control calculation device
AssigneeSumitomo Heavy Industries, Ltd.
InventorsTatsuya Yoshida, Shinya Hamada
Life of this patent
Estimating the term…
Abstract
A control calculation device performs a calculation of compensating for a volume change amount of each pressure chamber caused by a positional change of a pressure receiving plate inside a cylinder chamber for each position command value applied to two servo amplifiers, outputs each of the compensated position command values to the two servo amplifiers, and executes origin positioning for a position of a slider in order to compensate for the volume change amount.
Claims6
A control method of a gas pressure actuator which includes a guide portion and a slider configured to move along the guide portion, and in which a cylinder chamber is formed between the guide portion and the slider, a pressure receiving plate for partitioning the cylinder chamber into two pressure chambers in a moving direction is provided in one of the guide portion and the slider, and the slider is driven by a differential pressure between the two pressure chambers by allowing compressed gas to enter and exit each of the two partitioned pressure chambers via servo valves, the gas pressure actuator including
- a position sensor for detecting a position of the slider,
- two servo amplifiers for controlling each of two servo valves, and
- a control calculation device that receives a position detection signal from the position sensor and outputs a position command value to the two servo amplifiers, the control method comprising:
- causing the control calculation device to
- perform a calculation of compensating for a volume change amount of each pressure chamber caused by a positional change of the pressure receiving plate inside the cylinder chamber, for each position command value applied to the two servo amplifiers, and thereafter
- output each of the compensated position command values to the two servo amplifiers, and
- execute origin positioning for the position of the slider in order to compensate for the volume change amount.
A control method of a gas pressure actuator which includes a guide portion and a slider configured to move along the guide portion, and in which a cylinder chamber is formed between the guide portion and the slider, a pressure receiving plate for partitioning the cylinder chamber into two pressure chambers in a moving direction is provided in one of the guide portion and the slider, and the slider is driven by a differential pressure between the two pressure chambers by allowing compressed gas to enter and exit each of the two partitioned pressure chambers via servo valves, the gas pressure actuator including
- a position sensor for detecting a position of the slider,
- two servo amplifiers for controlling each of the two servo valves, and
- a control calculation device that receives a position detection signal from the position sensor and outputs a position command value to the two servo amplifiers, the control method comprising:
- causing the control calculation device to switch a gain at the time when each position command value applied to the two servo amplifiers is calculated based on the position detection signal from the position sensor, before and after a completion of origin positioning for the position of the slider.
A control calculation device fora gas pressure actuator which includes a guide portion and a slider configured to move along the guide portion, and in which a cylinder chamber is formed between the guide portion and the slider, a pressure receiving plate for partitioning the cylinder chamber into two pressure chambers in a moving direction is provided in one of the guide portion and the slider, and the slider is driven by a differential pressure between the two pressure chambers by allowing compressed gas to enter and exit each of the two partitioned pressure chambers via servo valves, the gas pressure actuator including
- a position sensor for detecting a position of the slider, and
- two servo amplifiers for controlling each of two servo valves, the control calculation device receiving a position detection signal from the position sensor and outputting a position command value to the two servo amplifiers, wherein
- the control calculation device configured to
- perform a calculation of compensating for a volume change amount of each pressure chamber caused by a positional change of the pressure receiving plate inside the cylinder chamber for each position command value applied to the two servo amplifiers, and thereafter
- output each of the compensated position command values to the two servo amplifiers, and
- execute origin positioning for the position of the slider in order to compensate for the volume change amount.
A control calculation device fora gas pressure actuator which includes a guide portion and a slider configured to move along the guide portion, and in which a cylinder chamber is formed between the guide portion and the slider, a pressure receiving plate for partitioning the cylinder chamber into two pressure chambers in a moving direction is provided in one of the guide portion and the slider, and the slider is driven by a differential pressure between the two pressure chambers by allowing compressed gas to enter and exit each of the two partitioned pressure chambers via servo valves, the gas pressure actuator including
- a position sensor for detecting a position of the slider, and
- two servo amplifiers for controlling each of two servo valves, the control calculation device receiving a position detection signal from the position sensor and outputting a position command value to the two servo amplifiers, wherein
- the control calculation device configured to
- switch a gain at the time when each position command value applied to the two servo amplifiers is calculated based on the position detection signal from the position sensor, before and after a completion of origin positioning for the position of the slider.
Dependencies are inferred from the claim text.