Dissimilar microcontrollers for outflow valve
AssigneeHoneywell International Inc.
InventorDarrell W. Horner
Life of this patent
Estimating the term…
Abstract
In some examples, a cabin pressure control and monitoring system includes an outflow valve, a first motor configured to operate the outflow valve to release fluid from a cabin, and a second motor configured to operate the outflow valve to release fluid from the cabin. The cabin pressure control and monitoring system also includes a first microcontroller configured to automatically control the first motor based on a pressure of the fluid in the cabin. The cabin pressure control and monitoring system further includes a second microcontroller configured to control the second motor based on user input and monitor the pressure of the fluid in the cabin. In some examples, a type of the first microcontroller is different than a type of the second microcontroller.
Claims11
A cabin pressure control and monitoring system comprising:
- an outflow valve;
- a first motor configured to operate the outflow valve to release fluid from a cabin;
- a second motor configured to operate the outflow valve to release fluid from the cabin;
- a first microcontroller configured to automatically control the first motor based on a pressure of the fluid in the cabin;
- and
- a second microcontroller configured to:
- drive the second motor at a first speed greater than zero in response to sensing a user input, and
- increase the second motor from the first speed to a second speed greater than zero in response to sensing the user input for more than a predetermined duration, wherein the second speed is faster than the first speed;
- and
- wherein a type of the first microcontroller is different than a type of the second microcontroller.
A method for controlling a pressure of a fluid in a cabin, the method comprising:
- automatically controlling, by a first microcontroller and based on the pressure of the fluid in the cabin, a first motor to operate an outflow valve to release the fluid from the cabin;
- controlling, by a second microcontroller and based on a user input, a second motor to operate the outflow valve to release fluid from the cabin, wherein controlling the second motor comprises:
- driving the second motor at a first speed greater than zero in response to sensing the user input, and
- increasing the second motor from the first speed to a second speed greater than zero in response to sensing the user input for more than a predetermined duration, wherein the second speed is faster than the first speed;
- and
- monitoring, by the second microcontroller, the pressure of the fluid in the cabin,
- wherein a type of the first microcontroller is different than a type of the second microcontroller.
Dependencies are inferred from the claim text.