CN103970027B - A telemetry processing unit simulation method in a comprehensive electronic software simulation environment - Google Patents

Abstract

The invention relates to a telemetry processing unit simulation method in the integrated electronic simulation software environment. The method is implemented through a telemetry data interactive simulation system, telemetry processing unit state changes and data interacting process in an integrated electronic unit are simulated at the first time by matching the FPGA technology and telemetry simulation computer software, implementing method is facilitated, responding speed is high, telemetry processing unit state parameters and simulation quantity in the telemetry process can be modified in real time, and the telemetry processing unit failure simulation requirements and the testing requirements of a thermal control subsystem and power subsystem can be met accordingly; meanwhile, by adopting the interrupt design and changing the telemetry processing unit state, in-time response of irregularly-periodical telemetry data is implemented, the simulation problems of large-amount data millisecond-level receiving of the telemetry processing unit of the integrated electronic unit and rapid telemetry processing unit state changes are solved effectively, and developing efficiency is improved significantly.

Description

A telemetry processing unit simulation method in a comprehensive electronic software simulation environment

technical field

The invention belongs to the technical field of comprehensive electronic simulation of lunar surface patrollers, and relates to a method for simulating a telemetry processing unit in a comprehensive electronic software simulation environment, which can be applied to the simulation of the telemetry processing unit in the comprehensive electronic unit of the lunar surface patroller.

Background technique

Because the lunar surface patrol has the requirements of miniaturization and light weight, its integrated electronic unit integrates most of the electronic circuits of the patrol. The inspector is different from the usual method of telemetry data transmission through the data bus in previous models, but uses an independent telemetry processing unit to complete the two-way data interaction with the central computer.

In the simulation process of the telemetry processing unit, in the past, the fixed-period query method was usually used to read the instructions and data sent by the central computer to the telemetry processing unit. This method has the following disadvantages:

(1) Since there are 7 transmission channels between the integrated electronic unit of the patroller and the telemetry processing unit, the downlink data has an uncertain period, and the fastest transmission period is at the millisecond level. Therefore, the untimely response of the fixed-period query mode will result in packet loss.

(2) The period for the central computer to send telemetry data is determined by the state of the telemetry processing unit. The telemetry task has a higher priority in the integrated electronic software, and the task scheduling timing is greatly affected by the telemetry processing unit. The query method cannot reflect the real-time changes in the state of the telemetry processing unit in a timely manner, so it cannot simulate the logic and timing of data interaction between the central computer and the telemetry processing unit.

Contents of the invention

The purpose of the present invention is to provide a telemetry processing unit simulation method in a comprehensive electronic software simulation environment. The defects of data loss and imperfect logic timing simulation in the electronic simulation environment have significantly improved the development efficiency.

Above-mentioned purpose of the present invention is mainly achieved through the following technical solutions:

A method for simulating a telemetry processing unit in a comprehensive electronic software simulation environment, realized by a telemetry data interactive simulation system, the telemetry data interactive simulation system comprising an on-board computer and a ground-simulated telemetry processing unit, the telemetry processing unit is controlled by a telemetry simulation Composed of computer and FPGA module, the specific implementation method is as follows:

Step (1), the on-board computer sends control instructions to the FPGA module, the control instructions include instructions for querying the working status of the telemetry processing unit, instructions for obtaining analog sampling values, and channel control instructions;

Step (2), the FPGA module checks and judges the received control command, if the control command passes the check, stores the control command, sets the working status to "not ready", and triggers an interrupt, Enter step (3); if the control command fails to pass the verification, discard the command and telemetry data;

Step (3), after the telemetry simulation computer receives the interrupt, it first reads and classifies the control instructions that have passed the verification from the FPGA module, wherein according to the instruction for querying the working status of the telemetry processing unit, the current Send the working status data to the FPGA module, and enter step (4); the telemetry simulation computer sends the required analog sampling value to the FPGA module according to the instruction to obtain the analog sampling value, and enter step (5); the telemetry simulation computer controls according to the channel command, set the channel number of the telemetry processing unit, and send the set channel number information to the FPGA module, and enter step (6);

Step (4), the FPGA module receives the current working status data of the telemetry processing unit. If the current working status is "ready", the on-board computer sends the telemetry data to the FPGA module. After the FPGA module receives the telemetry data, Perform verification and judgment on the telemetry data, if the telemetry data passes the verification, store the telemetry data, set the working status to "not ready", trigger an interruption, and enter step (7); if the telemetry data If the verification fails, the telemetry data is discarded;

Step (5), the FPGA module stores the sampled value of the analog quantity after receiving it, and stores it for the on-board computer to read;

Step (6), the FPGA module stores the channel number information after receiving it, and reads it for the on-board computer;

Step (7), after receiving the interrupt, the telemetry simulation computer reads the telemetry data from the FPGA module and displays and stores them.

In the telemetry processing unit simulation method in the above-mentioned comprehensive electronic software simulation environment, after the telemetry simulation computer receives the channel control instruction in step (3), the waiting time is set (the processing time after the analog telemetry processing unit receives a frame of telemetry data), After the waiting time is up, the current working state of the telemetry processing unit is set to the "ready" state.

In the telemetry processing unit simulation method in the above-mentioned comprehensive electronic software simulation environment, different channels (different transmission rates) in the telemetry processing unit correspond to different waiting times.

In the above-mentioned telemetry processing unit simulation method in the integrated electronic software simulation environment, the sampled value of the analog quantity required in step (3) comes from the thermal control subsystem and the power supply subsystem.

In the above-mentioned telemetry processing unit simulation method in the comprehensive electronic software simulation environment, the telemetry data sent by the on-board computer to the FPGA module in step (1) is non-period telemetry data, and the non-definite period includes telemetry data of different types The non-definite period between the telemetry data and the non-definite period between different frames of telemetry data in the same type of telemetry data.

In the telemetry processing unit simulation method in the above-mentioned integrated electronic software simulation environment, the minimum time interval between different frames of telemetry data in the same type of telemetry data is 1-2 ms.

Compared with the prior art, the present invention has the following beneficial effects:

(1) In view of the defects of the traditional telemetry processing unit simulation method and the special requirements of integrated electronics for telemetry data, the present invention designs a brand-new telemetry processing unit simulation method in an integrated electronic software simulation environment, which interacts with telemetry data Realization of the simulation system, using FPGA technology and telemetry simulation computer software to simulate the state change and data interaction process of the telemetry processing unit in the integrated electronic unit of the lunar surface patrol for the first time. The status parameters and analog quantities of the processing unit are modified in real time to meet the fault simulation requirements of the telemetry processing unit and the test requirements of the thermal control subsystem and power supply subsystem under different conditions;

(2), the simulation method of the telemetry processing unit in the integrated electronic software simulation environment of the present invention realizes the real-time response of non-periodic telemetry data by adopting interrupt design and changing the state of the telemetry processing unit, and effectively solves the problem of telemetry processing in the integrated electronic unit. The processing unit receives a large amount of data at the millisecond level and simulates the rapid change of the state of the telemetry processing unit, and at the same time avoids the blockage of the hardware board data receiving area caused by the computer being unable to respond to interruptions in a short period of time after receiving multiple instructions continuously;

(3), the telemetry processing unit simulation method of the present invention is applicable to both the real-time response of fixed-period telemetry data and the real-time response of non-fixed-period telemetry data, meeting the requirements of different telemetry data types and transmission methods, and improving data response Speed, effectively avoiding data loss, has a wide range of application and strong practicability;

(4), the method of the present invention dynamically simulates the real-time data interaction process between the on-board computer and the telemetry processing unit, effectively simulates the state change of the telemetry processing unit, and greatly reduces the dependence on the on-board telemetry processing unit during the development of integrated electronic application software , which is conducive to the early detection of program problems related to the telemetry processing unit in the integrated electronic software, as well as the testing of important functions such as thermal control that must be performed through the telemetry processing unit;

(5), the method of the present invention simulates the function of the telemetry processing unit, establishes a hardware simulation environment for integrated electronic software, significantly improves the development efficiency, and can meet the requirements of integrated electronic application software debugging and confirmation testing by performing closed-loop joint testing with the on-board computer. For functional and performance requirements, multiple simulation experiments and several version confirmation tests have been completed.

Description of drawings

Fig. 1 is the telemetry data interactive simulation system structure schematic diagram that the present invention adopts;

Fig. 2 is a working flow chart of the telemetry simulation computer of the present invention.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

The telemetry processing unit simulation method in the integrated electronic software simulation environment of the present invention is realized by a telemetry data interactive simulation system, as shown in Fig. The telemetry processing unit of the upper computer and the ground simulation, the telemetry processing unit is composed of a telemetry simulation computer and an FPGA module, which replaces the real telemetry processing unit board on the star.

The specific implementation process of the telemetry processing unit simulation method in the comprehensive electronic software simulation environment of the present invention is as follows:

Step (1), the on-board computer sends control instructions to the FPGA module, wherein the control instructions include instructions for querying the working status of the telemetry processing unit, instructions for obtaining analog sampling values, and channel control instructions. In this embodiment, the analog sampling The command cycle of the value is 512ms, that is, the command is sent every 512ms. In this embodiment, different types of telemetry data use 7 different channels.

Step (2), the FPGA module checks and judges the received control command. If the control command passes the check, it stores the control command, sets the working status to "not ready", and triggers an interrupt (using hardware interrupt , the accuracy is improved to meet the requirements of millisecond-level data reception and processing), when the on-board computer reads the flag, it does not send data, thereby avoiding interruptions and entering step (3). If the command fails the check, the command and telemetry data are discarded.

Step (3), after the telemetry simulation computer receives the interrupt, it first reads and classifies the control instructions that pass the verification from the FPGA module, and sends the current working status data of the telemetry processing unit according to the instruction for querying the working status of the telemetry processing unit to the FPGA module, enter step (4); the telemetry simulation computer sends the required analog sampling value to the FPGA module according to the instruction to obtain the analog sampling value, and enter step (5); the required analog sampling value comes from the thermal Control sub-system and power sub-system. The telemetry simulation computer sets the channel number of the telemetry processing unit according to the channel control command, and sends the set channel number information to the FPGA module, and enters step (6).

Step (4), the FPGA module receives the current working status data of the telemetry processing unit in the above step (3). If the current working status is "ready", the on-board computer sends the telemetry data to the FPGA module, and the FPGA module receives the data After the telemetry data, check and judge the telemetry data, if the telemetry data passes the verification, store the telemetry data, set the working status to "not ready", trigger an interrupt, and enter step (7); if the telemetry data If the data fails to pass the verification, the telemetry data is discarded;

In the above step (3), after the telemetry simulation computer receives the channel control command, set the waiting time (that is, the processing time after the analog telemetry processing unit receives a frame of telemetry data), and after the waiting time is up, set the current working state of the telemetry processing unit to "ready" state. Different channels (different transmission rates) in the telemetry processing unit have different waiting times.

The telemetry data sent by the computer on the star to the FPGA module is telemetry data with an indeterminate period. The indeterminate period means that the arrival time of the telemetry data is uncertain, including the non-fixed period between different types of telemetry data and the difference between the same type of telemetry data. Indefinite period between frames of telemetry data. For the non-definite period between different frames of telemetry data in the same type of telemetry data, that is, the arrival time intervals of data frames are different, for example, the first frame of data arrives at t0, the second frame of data arrives at t0+1, and the third frame of data Time t0+1+0.8 arrives, and the fourth frame of data arrives at time t0+1+0.8+0.9.... In the present invention, the minimum time interval between different frames of telemetry data in the same type of telemetry data is 1-2 ms.

For the non-fixed period between different types of telemetry data, that is, the arrival time intervals of different types of telemetry data are different. For example, the arrival time interval between data frames in the first type of telemetry data is the same as T0, and in the second type The arrival time interval between data frames is the same as T1, and T0≠T1.

In step (5), the FPGA module receives the sampled value of the analog quantity in step (3) and stores it for the on-board computer to read.

Step (6), the FPGA module receives the channel number information in step (3) and stores it for the on-board computer to read.

Step (7), after the telemetry simulation computer receives the interrupt, it reads the telemetry data from the FPGA module, and the telemetry simulation computer first analyzes the telemetry data, and the original code of the received telemetry data is parsed according to the definition of the telemetry data format and telemetry protocol , get the required data form, and then display and store the data.

During the above-mentioned telemetry data interaction process, if the telemetry processing unit has not received data for more than 300s (that is, the telemetry processing unit has not read that the working status of the telemetry processing unit is "ready"), the telemetry simulation computer will set the status of the telemetry processing unit to "automatic telemetry in progress". ". As shown in Fig. 2, it is a working flow diagram of the telemetry simulation computer of the present invention.

The present invention abstracts the simulation implementation method of the telemetry processing unit into two parts, the first is the hardware interface simulation and its FPGA multi-task automatic processing, which is realized by using the FPGA chip, and simulates the real telemetry board to complete the data reception and instruction processing; the second is For the dynamic simulation of the state change of the ground telemetry processing unit and data transmission and reception, it is mainly completed in the telemetry simulation computer, and the control instructions and telemetry data from the FPGA module are received in the interrupt triggered by the FPGA. The present invention makes full use of the accuracy of hardware timing and the flexibility of software settings to simulate the process and timing of data interaction between the telemetry processing unit and the central computer, which can not only reproduce the state changes of the telemetry processing unit, but also simulate various Timing can also meet the setting requirements for collecting analog quantities through the telemetry processing unit.

The telemetry processing unit simulation method in the integrated electronic software simulation environment of the present invention realizes the real-time response of non-fixed-period telemetry data by adopting interrupt design and changing the state of the telemetry processing unit, and effectively solves the problem of large data of the telemetry processing unit in the integrated electronic unit The millisecond-level reception and the simulation of the rapid change of the state of the telemetry processing unit avoid the blockage of the data receiving area of the hardware board caused by the computer being unable to respond to the interruption in a short time due to the continuous receipt of multiple instructions in a short period of time; the telemetry of the present invention The processing unit simulation method is applicable to both the real-time response of fixed-period telemetry data and the real-time response of non-fixed-period telemetry data, which meets the requirements of different telemetry data types and transmission methods, improves data response speed, and effectively avoids data loss.

The above description is only the best specific implementation mode of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of changes or modifications within the technical scope disclosed in the present invention. Replacement should be covered within the protection scope of the present invention.

The content that is not described in detail in the specification of the present invention belongs to the well-known technology of those skilled in the art.

Claims (6)

1. the remote measurement processing unit analogy method in an integrated electronics software emulation environment, it is characterized in that: realized by telemetry interactive simulation system, described telemetry interactive simulation system comprises the remote measurement processing unit of On board computer and ground simulation, described remote measurement processing unit is made up of telemetry simulation computing machine and FPGA module, and concrete methods of realizing is as follows:

Steering order is sent to FPGA module by step (), On board computer, and described steering order comprises the instruction inquiring about described remote measurement processing unit duty, the instruction obtaining analog quantity sampled value and passage steering order;

Step (two), FPGA module are carried out verification to the steering order received and are judged, if described steering order by verification, then stores, duty is set to " unripe " by described steering order, and triggered interrupts, enter step (three); If described steering order by verification, does not then abandon by described steering order;

Step (three), telemetry simulation computing machine are had no progeny in receiving, first from FPGA module, read the steering order by verification and classify, wherein according to the instruction of the described remote measurement processing unit duty of inquiry, described remote measurement processing unit current operating state data are sent to FPGA module, enters step (four); The analog quantity sampled value required, according to the instruction obtaining analog quantity sampled value, is sent to FPGA module, enters step (five) by telemetry simulation computing machine; Telemetry simulation computing machine, according to passage steering order, sets the channel number of remote measurement processing unit, and the channel number information of setting is sent to FPGA module, enter step (six);

Step (four), FPGA module receive described remote measurement processing unit current operating state data, if current operating state is " being ready to " state, then On board computer sends telemetry to FPGA module, after FPGA module receives described telemetry, verification is carried out to described telemetry and judges, if telemetry is by verification, then telemetry is stored, duty is set to " unripe ", and triggered interrupts, enter step (seven); If described telemetry by verification, does not then abandon by described telemetry;

Step (five), FPGA module store after receiving described analog quantity sampled value, read for On board computer;

Step (six), FPGA module store after receiving described channel number information, read for On board computer;

Step (seven), telemetry simulation computing machine are had no progeny in receiving, telemetry is read from FPGA module, first telemetry simulation computing machine resolves telemetry, the telemetry true form being about to receive is resolved according to the definition of telemetry form and telemetry protocol, obtain the data mode required, afterwards data shown and store.

2. the remote measurement processing unit analogy method in a kind of integrated electronics software emulation environment according to claim 1, it is characterized in that: after in described step (three), telemetry simulation computing machine receives passage steering order, stand-by period is set, after stand-by period reaches, described remote measurement processing unit current operating state is set to " being ready to " state.

3. the remote measurement processing unit analogy method in a kind of integrated electronics software emulation environment according to claim 2, is characterized in that: the stand-by period that in described remote measurement processing unit, different passage is corresponding is different.

4. the remote measurement processing unit analogy method in a kind of integrated electronics software emulation environment according to claim 1, the analog quantity sampled value required in described step (three) comes from thermal control subsystem and power subsystem.

5. the remote measurement processing unit analogy method in a kind of integrated electronics software emulation environment according to claim 1, it is characterized in that: On board computer sends to the telemetry of FPGA module to be the telemetry of non-fixed cycle in described step (), described non-fixed cycle comprises the non-fixed cycle in non-fixed cycle between inhomogeneity telemetry and same class telemetry between different frame telemetry.

6. the remote measurement processing unit analogy method in a kind of integrated electronics software emulation environment according to claim 5, is characterized in that: the minimum interval in described same class telemetry between different frame telemetry is 1 ~ 2ms.