CN106873355B - Method for selecting and switching multi-priority maintenance test instruction and control law instruction - Google Patents

Abstract

The invention relates to a method for selecting and switching a multi-priority maintenance test instruction and a control law instruction. The invention designs a BIT and control law interface by adopting a partition method, the interface is placed in a main flight control partition, main control software and maintenance software run simultaneously, a downlink switch selects whether to output a control law or a maintenance instruction, and a desalination switching instruction is adopted. When the maintenance mode is entered and no test starts to be executed, the maintenance instruction outputs a control law instruction. When the maintenance operator selects different tests in real time, the maintenance module selects the maintenance test instruction with the highest priority to be output by adopting the uplink switch, and the downlink switch is also switched to the maintenance test instruction. The mode of associating and unifying the maintenance and control laws and separating the functions enables the whole main flight control system software to output continuous and effective instructions at any time, supports real-time selection of tests and execution of the tests according to the priority order, and prevents unsmooth instruction switching.

Description

Method for selecting and switching multi-priority maintenance test instruction and control law instruction

Technical Field

The invention belongs to the field of flight control system software, and relates to a method for selecting and switching a multi-priority maintenance test instruction and a control law instruction.

Background

The types and functions of flight control system BIT maintenance tests are continuously increased, nesting and priority logic exist among different maintenance tests, and therefore interface design, selection and switching logic of flight control BIT maintenance tests and control laws are more and more complex. The traditional design method often does not realize the real-time selection of multiple priority tests and does not solve the problem of smooth switching of test instructions and control law instructions.

The purpose of the invention is as follows:

aiming at the problems, the invention provides a design method for realizing real-time selection and smooth switching of a multi-priority maintenance test instruction and a control law instruction.

The technical scheme of the invention is as follows:

a method for selecting and switching a multi-priority maintenance test instruction and a control law instruction is characterized in that a BIT maintenance test function and a control law function are uniformly placed in a PF (main flight control) partition of an FCM (flight control computer); and setting an uplink switch as the selection of the multi-priority maintenance test instruction, and setting a downlink switch as the selection of the maintenance test instruction and the control law instruction.

The method specifically comprises the following implementation steps:

step 1, after entering a maintenance mode, if no maintenance test is reached, an uplink switch outputs a control law instruction, and a downlink switch outputs the control law instruction to an ACE (actuator controller);

step 2, in a maintenance mode, a maintainer sends out an effective item maintenance test instruction in real time through an interactive device, selects a command of a current highest priority test item through an uplink switch and outputs the command as a maintenance instruction, and a downlink switch outputs the maintenance instruction output by the uplink switch to the ACE;

step 3, after the current maintenance test is finished, latching the last maintenance test command until the next maintenance test is reached, and repeating the step 2, or executing the step 4 and the step 5 until the maintenance mode is exited;

step 4, when the maintenance mode is switched to the control law mode, the downlink switch carries out desalination treatment on the switching of the instruction;

and 5, after entering the control law mode, the downlink switch outputs a control law instruction to the ACE.

The invention has the beneficial effects that:

a) partition function division and unification flexibility

The conventional flight control system and the BIT maintenance system are separately designed and independently operated, and a periodic flight control task needs to be closed when a maintenance test is started, so that a control law instruction cannot be switched to when no test is carried out. The method of the invention only needs to place the two in the same partition and run simultaneously, which is uniform and not coupled, and is flexible in switching.

b) Multiple tests are started in real time and executed in order of priority

Any test is initiated by the operator in real time through the maintenance equipment and a test signal is sent to the flight control system. When the tests with nested priorities of multiple classes are synchronously carried out, the flight control maintenance system can select the test with the current highest priority to execute, the response, the selection and the switching of the test command are real-time and orderly, and the software running time sequence is clear.

c) Continuous, smooth, safe and stable output instruction

No matter the flight control system is in a maintenance or control law mode, system software selects or switches corresponding instruction output after receiving a current flight control mode and an effective command in real time, and the instruction has no discontinuous point. And when the mode is switched, the output instruction is faded, so that the unsmooth command switching can be prevented, the problem of instruction step or jump is well solved, and the safety and the stability of the maintenance system are obviously improved.

Drawings

FIG. 1 is a schematic diagram of the overall implementation steps

FIG. 2 is a schematic view of a connection

Detailed Description

The method is further described in detail with reference to the accompanying drawings, the general implementation steps are shown in fig. 1, fig. 2 is a schematic connection diagram, and the detailed description is as follows:

1 sectorized unified interface design

a) A multi-redundancy flight control computer framework is adopted, and each flight control computer is divided into a plurality of partitions, such as a main flight control (PF) partition, an automatic flight control (AF) partition, a Signal Processing (SP) partition and the like;

b) both the Control Law (CLAW) function and the maintenance test (Maint) function are placed in a main flight control (PF) partition, an uplink switch and a downlink switch are respectively used as connection interfaces of the maintenance test and the control law, and the partition structure and the connection schematic diagram are shown in FIG. 2;

c) after receiving the identification of the valid test item of the OMS (central maintenance system) through the a664 bus, the FCM generates a corresponding maintenance test command and transmits the command to the interface uplink switch of the control law.

2 real-time selection, latching and smooth switching of multi-priority test instructions

a) When no effective item test exists in the maintenance test mode, the uplink switch still outputs a control law command to prevent the command from being discontinuous or jumped;

b) the maintenance personnel operate the control switch of the maintenance test system on the OMS terminal in real time, and the maintenance test function can simultaneously generate a plurality of test instructions and transmit the test instructions to the uplink switch interface after receiving the effective identification of the maintenance test item. The uplink switch outputs a command for selecting the current highest priority test item as a maintenance test instruction, and the downlink switch outputs the maintenance test instruction for selecting the uplink switch to output to the ACE; selecting which maintenance test instruction is output and executed according to the priority sequence; the uplink switch can receive a test instruction of the maintenance test item in real time, and automatically switch and output the maintenance test instruction;

c) after all the current maintenance tests are finished, the uplink switch outputs a last-beat maintenance test instruction by using the latch until the next maintenance test is reached, the latch is reset, and the step b) is repeated; or step d) step e) until the maintenance mode is exited;

d) when all the tests are finished, the maintenance mode is exited, and the downlink switch carries out desalination treatment on the switching from the maintenance instruction to the control law instruction, so that the smooth switching of the instruction is ensured;

e) when the control law mode is entered, the uplink switch and the downlink switch select to output a control law command.

Claims (1)

1. A method for selecting and switching a multi-priority maintenance test instruction and a control law instruction is characterized in that a BIT maintenance test function and a control law function are uniformly placed in a main flight control partition of a flight control computer; setting an uplink switch as the selection of a multi-priority maintenance test instruction, and setting a downlink switch as the selection of a maintenance test instruction and a control law instruction;

the method specifically comprises the following implementation steps:

step 1, after entering a maintenance mode, if no maintenance test is reached, an uplink switch outputs a control law instruction, and a downlink switch outputs the control law instruction to an actuator controller;

step 2, in a maintenance mode, a maintainer sends out an effective item maintenance test instruction in real time through an interactive device, selects a command of a current highest priority test item through an uplink switch and outputs the command as a maintenance instruction, and a downlink switch outputs the maintenance instruction output by the uplink switch to an actuator controller;

step 3, after the current maintenance test is finished, latching the last maintenance test instruction until the next maintenance test is reached, and repeating the step 2, or executing the step 4 and the step 5 until the instruction of exiting the maintenance mode is received;

step 4, when the maintenance mode is switched to the control law mode, the downlink switch carries out desalination treatment on the switching of the instruction;

and 5, after entering the control law mode, the downlink switch outputs a control law instruction to the actuator controller.