CN110764432B - Dynamic umbrella opening control system - Google Patents
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- CN110764432B CN110764432B CN201910975172.3A CN201910975172A CN110764432B CN 110764432 B CN110764432 B CN 110764432B CN 201910975172 A CN201910975172 A CN 201910975172A CN 110764432 B CN110764432 B CN 110764432B
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- G05B17/00—Systems involving the use of models or simulators of said systems
- G05B17/02—Systems involving the use of models or simulators of said systems electric
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
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Abstract
The utility model provides a dynamic parachute-opening control system, belongs to spacecraft test control technical field, through installing axial total pressure and the static pressure of airspeed head survey model at the model head, output model axial dynamic pressure after atmosphere survey computer processing, then send to dynamic pressure data processor, dynamic pressure data processor compares dynamic pressure value and the dynamic pressure threshold value that obtains with measuring, can also combine real-time measuring's overload data simultaneously. And when the comprehensive conditions reach the parachute ejection conditions, sending a parachute ejection test instruction to the universal controller, and ejecting the test parachute. The comprehensive conditions, particularly the dynamic pressure threshold value, are simulation results obtained after simulation analysis according to the model flight trajectory. The invention can be applied to various air-drop tests for verifying the parachute opening performance under the specified dynamic pressure condition, can effectively ensure the reliable work of the test parachute and ensure the safe recovery of the test model.
Description
Technical Field
The invention belongs to the technical field of spacecraft test control, and particularly relates to a dynamic parachute opening control system.
Background
In recent years, with the development of aerospace technology and the overall layout of national aerospace tasks, deep space exploration tasks represented by mars have been developed in China. The mission comprises entering the Mars atmosphere, and finally realizing the landing of the spacecraft on the surface of the Mars by decelerating in a parachuting mode. Where the parachute is an important stand-alone product to accomplish this task. And is also a product needing important performance verification in ground tests. The dynamic pressure for opening the parachute is an important design index influencing the parachute operation, and the newly developed parachute needs to be verified whether the parachute can be smoothly opened under the required dynamic pressure through an airdrop test.
In the traditional airdrop test, the parachute opening dynamic pressure is posterior data obtained by opening the parachute according to a time sequence trajectory, measuring the pulling force generated at the moment of straightening the parachute and combining the trajectory calculation. However, for the parachute working in the extraterrestrial star with thin air, the parachute opening dynamic pressure is low, when the dynamic pressure of the parachute is verified by an airdrop test on the earth surface, the influences of throwing conditions, atmospheric density and the like are difficult to overcome through time control, the accurate parachute opening dynamic pressure is difficult to obtain, and the parachute opening time is probably not in accordance with the test design requirements.
Disclosure of Invention
The technical problem solved by the invention is as follows: the dynamic parachute opening control system overcomes the defects of the prior art, axial total pressure and static pressure of a model are measured through an airspeed head mounted at the head of the model, axial dynamic pressure of the model is output after being processed by an atmosphere measuring computer and then is sent to a dynamic pressure data processor, the dynamic pressure data processor compares the dynamic pressure value obtained through measurement with a dynamic pressure threshold value, and meanwhile, real-time measurement overload data can be combined. And when the comprehensive conditions reach the parachute popping conditions, sending a parachute popping test instruction to the universal controller, and popping up the test parachute. The comprehensive conditions, particularly the dynamic pressure threshold value, are simulation results obtained after simulation analysis according to the model flight trajectory. The invention can be applied to various air-drop tests for verifying the parachute opening performance under the specified dynamic pressure condition.
The technical scheme of the invention is as follows:
a dynamic parachute opening control system comprising: the device comprises an airspeed head, an atmospheric data computer, a dynamic pressure acquisition battery, a dynamic pressure data processor, a pin pulling switch, a universal controller battery, a universal controller, an umbrella springing device, a test umbrella and an initiating explosive device battery;
the airspeed tube is used for sensing the atmospheric pressure in the flight direction and the atmospheric static pressure in the flight altitude in real time and then sending the atmospheric pressure and the atmospheric static pressure to the atmospheric data computer; the atmospheric data computer acquires real-time dynamic pressure according to the atmospheric pressure in the flight direction and the atmospheric static pressure in the flight altitude and sends the real-time dynamic pressure to the dynamic pressure data processor; the dynamic pressure data processor sends an umbrella opening instruction to the universal controller when judging that the real-time dynamic pressure meets the umbrella opening dynamic pressure condition; when the universal controller judges that an enabling signal, an umbrella opening instruction and the timing duration of the universal controller which are output by the pin pulling switch meet an umbrella opening condition together, the universal controller controls the initiating explosive device battery to supply power to the umbrella ejecting device, and the umbrella ejecting device ejects a test umbrella;
the dynamic pressure acquisition battery is used for supplying power to the air data computer and the dynamic pressure data processor; the universal controller battery is used for supplying power to the universal controller.
Preferably, the umbrella opening conditions are as follows:
when the pin pulling switch outputs an enabling signal and the dynamic pressure data processor outputs an umbrella opening instruction, and the timing duration of the universal controller is less than the preset duration; or; and when the pin pulling switch outputs the enabling signal, the timing time of the universal controller is more than or equal to the preset time.
Preferably, the dynamic pressure conditions for opening the umbrella are as follows: four-time real-time dynamic pressure data p measured continuously 0 、p 1 、p 2 、p 3 Wherein p is 0 、p 1 、p 2 Sequentially increased and third real-time dynamic pressure p 2 Fourth real-time kinetic pressure p 3 Are both greater than the dynamic pressure threshold p.
Preferably, the dynamic pressure data processor and the universal controller are isolated by optical couplers, and the dynamic pressure data processor and the universal controller do not share a ground wire.
Preferably, the value range of the preset duration is less than or equal to 2s.
A dynamic parachute opening control system comprising: airspeed head, air data computer, dynamic pressure collecting battery, dynamic pressure data processor, pin pulling switch, general controller battery, general controller, umbrella springing device, test umbrella, initiating explosive device battery, overload measuring device;
the overload measuring device is used for sensing overload in real time and sending an umbrella opening preparation instruction to the general controller when judging that the real-time overload meets the umbrella opening preparation condition;
the airspeed tube is used for sensing the atmospheric pressure in the flight direction and the atmospheric static pressure in the flight altitude in real time and then sending the atmospheric pressure and the atmospheric static pressure to the atmospheric data computer; the atmospheric data computer acquires real-time dynamic pressure according to the atmospheric pressure in the flight direction and the atmospheric static pressure in the flight altitude and sends the real-time dynamic pressure to the dynamic pressure data processor; the dynamic pressure data processor sends an umbrella opening instruction to the universal controller when judging that the real-time dynamic pressure meets the umbrella opening dynamic pressure condition;
when the universal controller judges that an enabling signal, an umbrella opening preparation instruction, an umbrella opening instruction and the timing duration of the universal controller which are output by the pin pulling switch meet an umbrella opening condition together, the universal controller controls the initiating explosive device battery to supply power to the umbrella ejecting device, and the umbrella ejecting device ejects a test umbrella;
the dynamic pressure acquisition battery is used for supplying power to the air data computer and the dynamic pressure data processor; the universal controller battery is used for supplying power to the universal controller.
Preferably, the umbrella opening conditions are as follows:
when the pin pulling switch outputs an enabling signal, the overload measuring device outputs an umbrella opening preparation instruction, the dynamic pressure data processor outputs an umbrella opening instruction, and the timing duration of the universal controller is less than the preset duration; or; and when the pin pulling switch outputs the enabling signal, the timing time of the universal controller is more than or equal to the preset time.
Preferably, the dynamic pressure conditions for opening the umbrella are as follows: four-time real-time dynamic pressure data p measured continuously 0 、p 1 、p 2 、p 3 Wherein p is 0 、p 1 、p 2 Sequentially increased and third real-time dynamic pressure p 2 Fourth real-time kinetic pressure p 3 Are both greater than the dynamic pressure threshold p.
Preferably, the dynamic pressure data processor and the universal controller are isolated by optical couplers, and the dynamic pressure data processor and the universal controller do not share a ground wire.
Preferably, the value range of the preset duration is less than or equal to 2s.
Preferably, the umbrella opening preparation conditions are as follows: measuring three times of real-time overload data a continuously 0 、a 1 、a 2 And a is a 0 、a 1 、a 2 Sequentially increased and overloaded a for the third time in real time 2 Greater than the overload threshold a.
Compared with the prior art, the invention has the beneficial effects that:
(1) The invention can directly obtain dynamic pressure data at the moment of opening the parachute and in the falling process of the parachute, more accurately control the moment of opening the parachute and can be suitable for more complicated landing environment;
(2) According to the method, the axial dynamic pressure of the model is measured, and the dynamic pressure is judged, so that the parachute opening condition is accurately controlled, and a better control platform can be provided for the strength verification of the parachute;
(3) The invention combines a plurality of conditions such as parachute opening enable, dynamic pressure data, overload data, reserve time and the like, and improves the reliability and effectiveness of parachute opening;
(4) The invention improves the reliability of the system from two levels of software and hardware by means of time backup; even if the atmosphere measurement computer or the dynamic pressure data processor fails or the software fails to output instructions, the system can still ensure the test parachute to work through the time backup of the universal controller, and the work target is finished.
Drawings
FIG. 1 is a schematic diagram of a system according to an embodiment of the present invention;
FIG. 2 is a dynamic pressure-time characteristic curve for an air drop test according to an embodiment of the present invention;
fig. 3 is a timing diagram illustrating the operation of the system of the present invention.
Detailed Description
The invention is further illustrated by the following examples.
Example 1
A dynamic parachute opening control system comprising: the device comprises an airspeed head, an atmospheric data computer, a dynamic pressure acquisition battery, a dynamic pressure data processor, a pin pulling switch, a universal controller battery, a universal controller, an umbrella springing device, a test umbrella and an initiating explosive device battery;
the airspeed tube is used for sensing the atmospheric pressure in the flight direction and the atmospheric static pressure in the flight altitude in real time and then sending the atmospheric pressure and the atmospheric static pressure to the atmospheric data computer; the atmospheric data computer acquires real-time dynamic pressure according to the atmospheric pressure in the flight direction and the atmospheric static pressure in the flight altitude and sends the real-time dynamic pressure to the dynamic pressure data processor; the dynamic pressure data processor sends an umbrella opening instruction to the universal controller when judging that the real-time dynamic pressure meets the umbrella opening dynamic pressure condition; when the general controller judges that an enabling signal output by the pin pulling switch, an umbrella opening instruction and the timing duration of the general controller meet the umbrella opening condition, the general controller controls the initiating explosive device battery to supply power to the umbrella ejecting device, and the umbrella ejecting device ejects the test umbrella.
The dynamic pressure acquisition battery is used for supplying power to the air data computer and the dynamic pressure data processor; the universal controller battery is used for supplying power to the universal controller.
The dynamic pressure data processor and the universal controller are isolated by optical couplers, and the dynamic pressure data processor and the universal controller do not share a ground wire.
The umbrella opening conditions are as follows:
when the pin pulling switch outputs an enabling signal and the dynamic pressure data processor outputs an umbrella opening instruction, and the timing duration of the universal controller is less than the preset duration; or; and when the pin pulling switch outputs the enabling signal, the timing time of the universal controller is more than or equal to the preset time.
The dynamic pressure condition for opening the umbrella is as follows: four-time real-time dynamic pressure data p measured continuously 0 、p 1 、p 2 、p 3 Wherein p is 0 、p 1 、p 2 Sequentially increased and third real-time dynamic pressure p 2 Fourth real-time kinetic pressure p 3 Are both greater than the dynamic pressure threshold p.
And the value range of the preset time is less than or equal to 2s.
Example 2:
a dynamic parachute opening control system comprising: the device comprises an airspeed head, an atmospheric data computer, a dynamic pressure acquisition battery, a dynamic pressure data processor, a pin pulling switch, a universal controller battery, a universal controller, an umbrella springing device, a test umbrella, an initiating explosive device battery and an overload measuring device;
the overload measuring device is used for sensing overload in real time and sending an umbrella opening preparation instruction to the general controller when judging that the real-time overload meets the umbrella opening preparation condition;
the airspeed tube is used for sensing the atmospheric pressure in the flight direction and the atmospheric static pressure in the flight altitude in real time and then sending the atmospheric pressure and the atmospheric static pressure to the atmospheric data computer; the atmospheric data computer acquires real-time dynamic pressure according to the atmospheric pressure in the flight direction and the atmospheric static pressure in the flight altitude and sends the real-time dynamic pressure to the dynamic pressure data processor; the dynamic pressure data processor sends an umbrella opening instruction to the universal controller when judging that the real-time dynamic pressure meets the umbrella opening dynamic pressure condition;
when the universal controller judges that an enabling signal, an umbrella opening preparation instruction, an umbrella opening instruction and the timing duration of the universal controller which are output by the pin pulling switch meet an umbrella opening condition together, the universal controller controls the initiating explosive device battery to supply power to the umbrella ejecting device, and the umbrella ejecting device ejects a test umbrella; under normal conditions, the universal controller receives an enabling signal output by the pin pulling switch, an umbrella opening preparation instruction output by the overload measuring device and an umbrella opening instruction output by the dynamic pressure data processor in sequence, the universal controller controls the initiating explosive device battery to supply power to the umbrella ejecting device, and the umbrella ejecting device ejects a test umbrella.
The dynamic pressure acquisition battery is used for supplying power to the air data computer and the dynamic pressure data processor; the universal controller battery is used for supplying power to the universal controller.
The dynamic pressure data processor and the universal controller are isolated by optical couplers, and the dynamic pressure data processor and the universal controller do not share a ground wire.
The umbrella opening conditions are as follows:
when the pin pulling switch outputs an enabling signal, the overload measuring device outputs an umbrella opening preparation instruction, the dynamic pressure data processor outputs an umbrella opening instruction, and the timing duration of the universal controller is less than the preset duration; or; and when the pin pulling switch outputs the enabling signal, the timing time of the universal controller is more than or equal to the preset time.
The dynamic pressure condition for opening the umbrella is as follows: four-time real-time dynamic pressure data p measured continuously 0 、p 1 、p 2 、p 3 Wherein p is 0 、p 1 、p 2 Sequentially increased and third real-time dynamic pressure p 2 Fourth real-time kinetic pressure p 3 Are both greater than the dynamic pressure threshold p.
The value range of the preset duration is less than or equal to 2s.
The preparation conditions for opening the umbrella are as follows: measuring three times of real-time overload data a continuously 0 、a 1 、a 2 And a is a 0 、a 1 、a 2 Sequentially increased and overloaded a for the third time in real time 2 Greater than the overload threshold a. The value range of the overload threshold value a is 5 g-6 g.
Example 3:
FIG. 1 is a schematic diagram of a control system, which mainly comprises an airspeed head, an atmospheric measurement computer, a dynamic pressure data processor, a general controller, an umbrella springing device, a test umbrella, a connecting cable and a battery. The technical solution of the invention is as follows: a control system is composed of airspeed head, air data computer, dynamic pressure data processor and universal controller. The air speed tube is arranged at the head of the model to collect total pressure and static pressure and send the total pressure and the static pressure into the atmosphere data computer, the atmosphere data computer sends dynamic pressure data into the dynamic pressure data processor through a 485 bus, the dynamic pressure data processor sends out an elastic test umbrella instruction to the general controller through judgment, the dynamic pressure data processor and the general controller isolate different power supplies through an optical coupler, ground wire interference is avoided, and the instruction is sent and received. The universal controller controls the work of the initiating explosive device and pops up the test umbrella.
Meanwhile, when effective dynamic pressure cannot be measured due to uncontrollable factors such as throwing conditions, atmospheric conditions and the like, the general controller is programmed to be started and then timed, and the test parachute is popped up through time backup, so that the parachute is guaranteed to work, and the model can safely land.
The airspeed head is 1 electronic product, and its inside comprises sensor and signal processing circuit, sends the analog signal of telecommunication. The model is used for sensing the atmospheric pressure in the flying direction of the model and the static pressure of the atmosphere at the height of the model.
The atmospheric data computer collects the analog signals sent by the airspeed head for 1 piece of electronic product, and carries out digital processing and operation on the signals. And resolving the data such as the current dynamic pressure, the attitude and the like of the model and sending the data to a dynamic pressure data processor.
Dynamic pressure data processor for 1 electronic product for receiving atmosphere numberAnd judging according to the data of the computer. Storing the umbrella opening dynamic pressure design value p theoretically calculated before test into a precession pressure data processor, reading dynamic pressure and attitude signals sent by an atmospheric data computer by the precession pressure data processor within a certain sampling time delta t, and continuously collecting data for three times to satisfy p 0 ＜p 1 ＜p 2 The dynamic pressure is considered to be in a monotonously rising space. When the third frame signal p 2 Is greater than the dynamic pressure design value p and the fourth frame signal is also greater than the design value, i.e. p 3 And when the current value is more than p, an umbrella opening instruction is sent to the general controller.
The universal controller is used for receiving dynamic pressure reaching signals sent by the dynamic pressure data processor for 1 electronic product, and supplies power for the test parachute bomb tube, so that the test parachute is opened according to the preset dynamic pressure. The universal controller is also provided with a delay parachute opening instruction, and if the parachute opening instruction sent by the dynamic pressure data processor is not received within 2s, the parachute is powered to the test parachute ejection cylinder in a forced mode.
The test umbrella ejecting cylinder is 1 initiating explosive instantaneous mechanism and is used for receiving the electric signal sent by the universal controller and ejecting the test umbrella.
Fig. 2 is a dynamic pressure-time characteristic curve of an airdrop test. In the figure, the dynamic pressure is in a monotone rising section near the parachute ejection time, so that a target parachute ejection threshold value is set, and parachute ejection is performed when the measured dynamic pressure is higher than the threshold value.
Example 4:
the opening dynamic pressure of a certain parachute is low, and even in a strength test, the maximum opening dynamic pressure is only 1000 Pa. The dynamic pressure for opening the umbrella is greatly influenced by external factors, such as deviation of throwing conditions, atmospheric conditions and the like, and the magnitude of dynamic pressure deviation is about 300 Pa. The passing time control may exceed or fall short of the experimental design value. After the model is put in, the dynamic pressure of the model is in direct proportion to the quadratic power of time under the action of gravity, the traditional time delay control parachute opening is limited by high air tightness and throwing conditions, the parachute opening conditions are difficult to accurately control, and the parachute opening conditions are not in accordance with the experimental design requirements. The umbrella opening condition accurate control system of the invention senses the dynamic pressure value of the model through the airspeed head and the atmosphere measuring machine and judges the dynamic pressure value by using the dynamic pressure data processor. Dynamic pressure numberAccording to the dynamic pressure and attitude signals sent by the air data computer, which are read by the processor once every 2ms, the data is continuously acquired for three times to satisfy p 0 ＜p 1 ＜p 2 The dynamic pressure is considered to be in a monotonously rising space. When the third frame signal p 2 Is greater than the dynamic pressure design value p and the fourth frame signal is also greater than the design value, i.e. p 3 And when the current value is more than p, an umbrella opening instruction is sent to the general controller. The universal controller controls the parachute. Meanwhile, the universal controller ensures that the model can still normally open the umbrella after the dynamic pressure processing unit fails through time backup. And judging the umbrella opening dynamic pressure by using posterior data.
The invention will be further explained with reference to the drawings.
Fig. 1 is a schematic diagram showing the composition of a system for controlling the intensity of an aerial delivery dynamic pressure of a parachute of a certain type according to the present invention, and fig. 3 is a timing chart of this embodiment. The system consists of an airspeed head, an atmosphere measuring computer, a dynamic pressure data processor, a universal controller, an umbrella ejection device, a test umbrella, a control battery, an initiating explosive battery, an atmosphere measuring battery, two JK-1 switches and a QLK-1 pin pulling switch. The control battery and the initiating power supply are used for providing a control power supply and an initiating power supply for the universal controller. The atmosphere measurement battery provides power for the atmosphere measurement computer and the dynamic pressure data processor.
Two JK-1 switches are opened before air drop is implemented, the universal controller is not electrified at the moment, and the atmosphere measuring computer and the dynamic pressure data processor are electrified to work.
When the universal controller is brought to a designated airspace to carry out air drop, the switch QLK-1 is used for starting the power-on work of the universal controller, and the universal controller sends an enable instruction of the missile test parachute to the dynamic pressure data processor. And after receiving the signal, the dynamic pressure data processor starts a dynamic pressure data judgment function. The dynamic pressure data is received through the 485 bus, and after the dynamic pressure is judged to be in a monotone interval, when the 2 frames of data are judged to be greater than the dynamic pressure value, a 'bomb test umbrella instruction' is sent to the general controller, and the general controller drives the bomb test umbrella initiating explosive devices to work. And (6) popping up the test umbrella. According to the ballistic calculation result, the dynamic pressure of the model is close to the maximum dynamic pressure of the test umbrella allowed to open within 2s after the universal controller is started, so that the universal controller sends a 'bomb test umbrella' signal again 2s after the 'bomb test umbrella enabling' command is sent out, and the bomb test umbrella initiating explosive device is driven to work. Ensuring that the model can be reliably descended.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make possible variations and modifications of the present invention using the method and the technical contents disclosed above without departing from the spirit and scope of the present invention, and therefore, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention are all within the scope of the present invention.
Claims (11)
1. A dynamic parachute opening control system, comprising: the device comprises an airspeed head, an atmospheric data computer, a dynamic pressure acquisition battery, a dynamic pressure data processor, a pin pulling switch, a universal controller battery, a universal controller, an umbrella springing device, a test umbrella and an initiating explosive device battery;
the airspeed tube is used for sensing the atmospheric pressure in the flight direction and the atmospheric static pressure in the flight altitude in real time and then sending the atmospheric pressure and the atmospheric static pressure to the atmospheric data computer; the atmospheric data computer acquires real-time dynamic pressure according to the atmospheric pressure in the flight direction and the atmospheric static pressure in the flight altitude and sends the real-time dynamic pressure to the dynamic pressure data processor; the dynamic pressure data processor sends an umbrella opening instruction to the universal controller when judging that the real-time dynamic pressure meets the umbrella opening dynamic pressure condition; when the universal controller judges that an enabling signal, an umbrella opening instruction and the timing duration of the universal controller which are output by the pin pulling switch meet an umbrella opening condition together, the universal controller controls the initiating explosive device battery to supply power to the umbrella ejecting device, and the umbrella ejecting device ejects a test umbrella;
the dynamic pressure acquisition battery is used for supplying power to the air data computer and the dynamic pressure data processor; the universal controller battery is used for supplying power to the universal controller.
2. A dynamic parachute opening control system according to claim 1, wherein: the umbrella opening conditions are as follows:
when the pin pulling switch outputs an enabling signal and the dynamic pressure data processor outputs an umbrella opening instruction, and the timing duration of the universal controller is less than the preset duration; or; and after the pin pulling switch outputs the enabling signal, the timing duration of the universal controller is greater than or equal to the preset duration.
3. A dynamic parachute opening control system according to claim 1 or 2, wherein: the dynamic pressure condition for opening the umbrella is as follows: four-time real-time dynamic pressure data p measured continuously 0 、p 1 、p 2 、p 3 Wherein p is 0 、p 1 、p 2 Sequentially increased and third real-time dynamic pressure p 2 Fourth real-time kinetic pressure p 3 Are both greater than the dynamic pressure threshold p.
4. A dynamic parachute opening control system according to claim 1 or 2, wherein: the dynamic pressure data processor and the universal controller are isolated by optical couplers, and the dynamic pressure data processor and the universal controller do not share a ground wire.
5. A dynamic parachute opening control system according to claim 2, wherein: and the value range of the preset time is less than or equal to 2s.
6. A dynamic parachute opening control system, comprising: the device comprises an airspeed head, an atmospheric data computer, a dynamic pressure acquisition battery, a dynamic pressure data processor, a pin pulling switch, a universal controller battery, a universal controller, an umbrella springing device, a test umbrella, an initiating explosive device battery and an overload measuring device;
the overload measuring device is used for sensing overload in real time and sending an umbrella opening preparation instruction to the general controller when judging that the real-time overload meets the umbrella opening preparation condition;
the airspeed tube is used for sensing the atmospheric pressure in the flight direction and the atmospheric static pressure in the flight altitude in real time and then sending the atmospheric pressure and the atmospheric static pressure to the atmospheric data computer; the atmospheric data computer acquires real-time dynamic pressure according to the atmospheric pressure in the flight direction and the atmospheric static pressure in the flight altitude and sends the real-time dynamic pressure to the dynamic pressure data processor; the dynamic pressure data processor sends an umbrella opening instruction to the universal controller when judging that the real-time dynamic pressure meets the umbrella opening dynamic pressure condition;
when the universal controller judges that an enabling signal, an umbrella opening preparation instruction, an umbrella opening instruction and the timing duration of the universal controller which are output by the pin pulling switch meet an umbrella opening condition together, the universal controller controls the initiating explosive device battery to supply power to the umbrella ejecting device, and the umbrella ejecting device ejects a test umbrella;
the dynamic pressure acquisition battery is used for supplying power to the air data computer and the dynamic pressure data processor; the universal controller battery is used for supplying power to the universal controller.
7. A dynamic parachute opening control system according to claim 6, wherein: the umbrella opening conditions are as follows:
when the pin pulling switch outputs an enabling signal, the overload measuring device outputs an umbrella opening preparation instruction, the dynamic pressure data processor outputs an umbrella opening instruction, and the timing duration of the universal controller is less than the preset duration; or; and when the pin pulling switch outputs the enabling signal, the timing time of the universal controller is more than or equal to the preset time.
8. A dynamic parachute opening control system according to claim 6 or 7, wherein: the dynamic pressure condition for opening the umbrella is as follows: four-time real-time dynamic pressure data p measured continuously 0 、p 1 、p 2 、p 3 Wherein p is 0 、p 1 、p 2 Sequentially increased and third real-time dynamic pressure p 2 Fourth real-time kinetic pressure p 3 Are both greater than the dynamic pressure threshold p.
9. A dynamic parachute opening control system according to claim 6 or 7, wherein: the dynamic pressure data processor and the universal controller are isolated by optical couplers, and the dynamic pressure data processor and the universal controller do not share a ground wire.
10. A dynamic parachute opening control system according to claim 7, wherein: the value range of the preset duration is less than or equal to 2s.
11. A dynamic parachute opening control system according to claim 6 or 7, wherein: the preparation conditions for opening the umbrella are as follows: measuring three times of real-time overload data a continuously 0 、a 1 、a 2 And a is a 0 、a 1 、a 2 Sequentially increased and overloaded a for the third time in real time 2 Greater than the overload threshold a.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2800703C1 (en) * | 2023-01-16 | 2023-07-26 | Акционерное общество "Научно-производственное предприятие "Звезда" имени академика Г.И. Северина" | Control and recording equipment for flight tests of parachute systems |
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