System and method for controlling at least one switching device, especially for use in aircraft

Patent metadata

Field	Value
Publication number	US-2016049868-A1
Application number	US-201514827098-A
Country	US
Kind code	A1
Filing date	Aug 14, 2015
Priority date	Aug 14, 2014
Publication date	Feb 18, 2016
Grant date	—

Abstract

System, especially for use in aircraft, for controlling at least one switching device ( 5, 5 b, 5 n ) able to open or close the connection between at least one power source and at least one supplied device, and means for measuring the state of the power supply channel. The system comprises: at least two microcontrollers ( 1 a , 1 b ) each able to emit a command intended for each switching device ( 5, 5 b, 5 n ), said microcontrollers ( 1 a , 1 b ) being connected to at least one portion of the means for measuring the state of the power supply channel; and a means ( 14, 14 b, 14 n ) for determining the command to be transmitted, able to determine the command to be transmitted to each switching device ( 5, 5 b, 5 n ) from the commands emitted by each microcontroller ( 1 a , 1 b ) and intended for said control switch.

First claim

1 . System, especially for use in aircraft, for controlling at least one switching device ( 5 , 5 b , 5 n ) able to open or close the connection between at least one power source and at least one supplied device, and means for measuring the state of the power supply channel, the system being characterized in that it comprises:
at least two microcontrollers ( 1 a , 1 b ) each able to emit a command intended for each switching device ( 5 , 5 b , 5 n ) of a power supply channel, said microcontrollers ( 1 a , 1 b ) being connected to at least one portion of the means for measuring the state of the power supply channel, and a means ( 14 , 14 b , 14 n ) for determining the command to be transmitted, able to determine the command to be transmitted to each switching device ( 5 , 5 b , 5 n ) from the commands emitted by each microcontroller ( 1 a , 1 b ) and intended for said switching device ( 5 , 5 b , 5 n ).

2 . System according to claim 1 , in which the means ( 14 , 14 b , 14 n ) for determining the command to be transmitted comprise three inputs carrying a command signal originating from three microcontrollers,
the input carrying the command signal of a first microcontroller ( 1 a ) being connected to a NOT logic gate ( 31 ), the input carrying the command signal of a second microcontroller ( 1 b ) and the input carrying the command signal of a third microcontroller ( 1 c ) being connected to a first AND logic gate ( 32 ), the NOT logic gate ( 31 ) and the first AND logic gate ( 32 ) being connected to a second AND logic gate ( 33 ), the input carrying the command signal of the second microcontroller ( 1 b ) and the input carrying the command signal of the third microcontroller ( 1 c ) being connected to a first OR logic gate ( 34 ), the input carrying the command signal of the first microcontroller ( 1 a ) and the first OR logic gate ( 34 ) being connected to a third AND logic gate ( 35 ), the second AND logic gate ( 33 ) and the third AND logic gate ( 35 ) being connected to a second OR logic gate ( 36 ), and the output of the second OR logic gate ( 36 ) being connected to the output of the means ( 14 , 14 b , 14 n ) for determining the command to be transmitted.

3 . System according to claim 1 , in which the means ( 14 , 14 b , 14 n ) for determining the command to be transmitted comprises four inputs connected pairwise to two microcontrollers ( 1 a , 1 b ),
the four inputs carrying two command signals each originating from one microcontroller, and two validity signals, each also originating from one microcontroller, the second microcontroller ensuring the redundancy of the first microcontroller, the input carrying the command signal of the first microcontroller ( 1 a ) and the input carrying the validity signal of the first microcontroller ( 1 a ) being connected to a first NAND logic gate ( 15 ), the input carrying the command signal of the second microcontroller ( 1 b ) and the input carrying the validity signal of the second microcontroller ( 1 b ) being connected to a second NAND logic gate ( 16 ), the input carrying the validity signal of the first microcontroller ( 1 a ) and the second NAND logic gate ( 16 ) being connected to an OR logic gate ( 17 ), and the first NAND logic gate ( 15 ) and the OR logic gate ( 17 ) being connected to a third NAND logic gate ( 18 ), the output of the third NAND logic gate ( 18 ) being connected to the output of the means ( 14 ) for determining the command to be transmitted.

4 . System according to claim 1 , in which the means ( 14 , 14 b , 14 n ) for determining the command to be transmitted comprises four inputs connected pairwise to two microcontrollers ( 1 a , 1 b ),
the four inputs carrying two command signals each originating from one microcontroller, and two validity signals, each also originating from one microcontroller, the second microcontroller ensuring the redundancy of the first microcontroller, the input carrying the command signal of the first microcontroller ( 1 a ) and the input carrying the validity signal of the first microcontroller ( 1 a ) are connected to a first NAND logic gate ( 19 ), the input carrying the command signal of the second microcontroller ( 1 b ) and the input carrying the validity signal of the second microcontroller ( 1 b ) are connected to a second NAND logic gate ( 20 ), the input carrying the validity signal of the first microcontroller ( 1 a ) and the second NAND logic gate ( 20 ) are connected to a first OR logic gate ( 21 ), the first NAND logic gate ( 19 ) and the first OR logic gate ( 21 ) are connected to a third NAND logic gate ( 22 ), the input carrying the command signal of the first microcontroller ( 1 a ) and the input carrying the command signal of the second microcontroller ( 1 b ) being connected to a second exclusive OR logic gate ( 23 ), the input carrying the validity signal of the first microcontroller ( 1 a ) and the input carrying the validity signal of the second microcontroller ( 1 b ) being connected to a fourth AND logic gate ( 24 ), the second exclusive OR logic gate ( 23 ) and the fourth AND logic gate ( 24 ) being connected to a fifth AND logic gate ( 25 ), the third NAND logic gate ( 22 ) and the fifth AND logic gate ( 25 ) being connected to a sixth NAND logic gate ( 26 ), and the third NAND logic gate ( 22 ) being connected to a NOT logic gate ( 27 ), the NOT logic gate ( 27 ) and the fifth AND logic gate ( 25 ) being connected to a seventh NAND logic gate ( 28 ), the sixth NAND logic gate ( 26 ) being connected to the first input of an eighth NAND logic gate ( 29 ), the seventh NAND logic gate ( 28 ) being connected to the second input of a ninth NAND logic gate ( 30 ), the output of the ninth NAND logic gate ( 30 ) being connected to the second input of the eighth NAND logic gate ( 29 ), the output of the eighth NAND logic gate ( 29 ) being connected to the first input of the ninth NAND logic gate ( 30 ), and the output of the eighth NAND logic gate ( 29 ) also being connected to the output of the means ( 14 ) for determining the command to be transmitted.

5 . Use of the system according to claim 1 , in a power distribution system of an aircraft comprising at least one power supply channel comprising at least one switching device ( 5 , 5 b , 5 n ).

6 . Method, especially for use in aircraft, for controlling a switching device ( 5 , 5 b , 5 n ) able to open or close the connection between at least one power source and at least one supplied device, by means of a control system comprising:
means for measuring the state of the connection, at least two microcontrollers ( 1 a , 1 b ) each able to emit a command intended for each switching device ( 5 , 5 b , 5 n ), said microcontrollers ( 1 a , 1 b ) being connected to at least one portion of the means for measuring the state of the connection, and characterized in that it comprises a step in which the command transmitted to each switching device ( 5 , 5 b , 5 n ) is determined from the commands emitted by the microcontrollers and intended for each switching device ( 5 , 5 b , 5 n ).

7 . Method according to claim 6 , in which a command corresponding to the command received from most of the microcontrollers ( 1 a , 1 b , 1 c ) is transmitted as output, the control system comprising an uneven number of microcontrollers ( 1 a , 1 b , 1 c ) higher than three.

8 . Method according to claim 6 , in which each microcontroller ( 1 a , 1 b ) emits a command able to take a first value or a second value and a validity value able to take a first value if the command is judged valid by the microcontroller

Assignees

• Zodiac Aero Electric

Inventors

• Pradier Jean-Clair
• Guenot Stéphane

Classifications

• G06F11/1641 Primary

  where the comparison is not performed by the redundant processing components · CPC title

• H02J3/00

  Circuit arrangements for AC mains or AC distribution networks · CPC title

• H02M3/04 Primary

  by static converters · CPC title

• B64D47/00

  Equipment not otherwise provided for · CPC title

• H03K17/691

  using transformer coupling · CPC title