CN102158162B - Loading control device of alternating current (AC) motor for ground run up test of aircraft engine - Google Patents
Loading control device of alternating current (AC) motor for ground run up test of aircraft engine Download PDFInfo
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- CN102158162B CN102158162B CN 201110029836 CN201110029836A CN102158162B CN 102158162 B CN102158162 B CN 102158162B CN 201110029836 CN201110029836 CN 201110029836 CN 201110029836 A CN201110029836 A CN 201110029836A CN 102158162 B CN102158162 B CN 102158162B
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Abstract
The invention provides a loading control device of an alternating current (AC) motor for ground run up test of an aircraft engine, belonging to the technical field of motor control. The device comprises a chassis, a switching value output module, a switching value input module, an excitation source driver module, a central processing unit (CPU), a power source conversion module, a power source processing module, a voltage signal processing module, a current signal processing module, an aircraft plug input interface, an aircraft plug output interface, a fault and status indication interface, a switching push button and plug input interface, a communication interface and a data indicating instrument. The device is clear in structure, is simple and reliable in control, and has an intelligent fault-reporting function; a board mode is adopted in the whole design; the assembly and disassembly is convenient; an external aircraft plug is connected with a test bed system; the original control circuit of an original test bed is not changed; and the device is economic, reliable and convenient.
Description
Technical field:
The invention belongs to the electric machines control technology field, particularly a kind of aero-engine ground run alternating current machine add load control.
Background technology:
Aero-engine is equipped with two kinds of alternating current generators at present; also select two types alternating current generator add load control: a kind of is split type control device made in Russia for this reason; comprise voltage regulating device (ь р н 120 т 5 А), control protective unit (ь 3 у с ь 376 т) and mounting seat; this device internal structure very complex; adopt encapsulating structure; the defencive function that possesses skills, and expensive.Another kind of add load control is the analogue type control device (KZQ-4) of production domesticization, and encapsulating structure keeps in repair very difficult.Two types add load control breaks down in test run often, owing to all there not being careful control principle drawing, there is not intelligent alarm function yet, cause troubleshooting very difficult, substantially all be to adopt the mode troubleshooting of directly changing spare part, so not only bring constantly to production, and will spend extensive fund and prepare enough spare parts.
Summary of the invention:
For the deficiencies in the prior art, the invention provides a kind of aero-engine ground run alternating current machine add load control.
This device comprises cabinet, switching value output module, switching input module, field power supply driver module, cpu central processing unit, power transfer module, power supply processing module, voltage signal processing module, current signal processing module, aviation plug input interface, aviation plug output interface, fault and state indication interface, shift knob and plug input interface, communication interface and data Displaying Meter; Wherein switching value output module, switching input module, field power supply driver module, cpu central processing unit, power transfer module, power supply processing module, voltage signal processing module and current signal processing module all are assemblied in the cabinet; The input of shift knob and plug input interface connecting valve amount input module, the output of switching input module connects the input of cpu central processing unit, the output of power supply processing module connects respectively power transfer module, the input of voltage signal processing module and current signal processing module, power transfer module, the voltage signal processing module is connected output and is connected respectively the input of cpu central processing unit with current signal processing module, the aviation plug input interface connects the input of voltage signal processing module and current signal processing module, the output of cpu central processing unit is connecting valve amount output module respectively, the field power supply driver module, the input of communication interface and data Displaying Meter, the output of switching value output module connects fault and state indication interface, and the output of field power supply driver module connects the aviation plug output interface.
This device at first general～220V AC power process rectification and become-the 24V power supply is to the power supply of the components and parts on the signal processing module, power transfer module is that-24V electricity is converted to the appropriate voltage that CPU can accept to use.Open shift knob and connect each road power supply, then by the aviation plug input port 3 road voltages and 3 road current signals are accessed signal processing module, compare calculation process, and process by cpu central processing unit, export at any time a duty cycle signals to the exciting current driver module, form a dynamically constant exciting current of control alternator output voltage, control the generating voltage substantially constant of alternating current generator.Each road parameter of while directly outputs to the data Displaying Meter and shows in real time, and running status and alarm signal output to state and the fault alarm indication on the panel.The input and output of switching value are provided with special module and process, and mainly are the critical points of some state status and Protection parameters.Connecting computer when communication interface is safeguarded for this device or during commissioning test uses.
The control system of this device comprises that 7 modules are respectively: hardware platform initialization module, signals collecting and processing module, pid algorithm module, signal output module, communication module, task scheduling modules and monitoring and protection module.
The hardware platform initialization module: finish the initialization to this hardware platform equipment, initialization apparatus comprises house dog, IO port, serial communication, PWM output equipment, interrupt vector, clock and AD conversion.
Signals collecting and processing module: finish the analog acquisition of three-phase current, voltage signal and filtering and process, the collection of three-phase frequency signal is processed with filtering, the collection of three road 27V switching value input signals and disappear and tremble processing.
Pid algorithm module: by the voltage controller of setting, according to the three-phase voltage, the current signal that gather, adopt pid algorithm to calculate pwm control signal.
Signal output module: by the IO port realize " throws off horizontally turn, lubricating oil pressure is low, lubricating oil pressure is high, frequency is low, hand over the state of sending out " etc. the switching value signal export; By timer the PWMM waveform that the pid algorithm module calculates is exported.
Communication module: realize the communication function with host computer; Communication refresh cycle 1S; Data head is 0xAAAAAAAAAA in the agreement, and data tail 0xbb has 54 byte datas.
Task scheduling modules: the Time Resource Scheduling of realizing signal acquisition process, pid algorithm module, signal output, communication module, monitoring and protection module distributes.
Monitoring and protection module: realize desired generator protection function.
The present invention controls software can realize alternating current generator 115V constant voltage control function, generator condition monitoring and defencive function.
1. control software supervision alarm function is as follows:
A) when engine N2 rotating speed being arranged greater than 57%, and the low alarm signal of output lubricating oil pressure when collecting the lubricating oil pressure low signal;
B) when engine N2 rotating speed being arranged greater than 57%, and the high alarm signal of output oil temperature when collecting the high signal of oil temperature;
C) when engine N2 rotating speed being arranged greater than 57%, during and three-phase voltage frequency＜370Hz, output under-frequency alarm signal;
D) when engine N2 rotating speed being arranged greater than 57%, the output lubricating oil pressure is low, oil temperature is high, during the arbitrary road of under-frequency three tunnel alarm signals, 3 seconds afterwards output throw off permanent rotaring signal.
E) when engine N2 rotating speed being arranged greater than 57%, and when pressure reduction is greater than 5V between the three-phase voltage, stop exciting current output;
F) all do not collect when three-phase voltage, output is handed over and is sent out a status signal.
2. control software constant voltage is controlled function
The control strategy that native system mainly adopts is the PWM control mode.One of key character of PWM control mode is that the duty ratio size is determined by the output of PI algorithm.For the response speed that improves system/the reduce overshoot of system, the PI control algolithm that the design has adopted integration to separate, the input variable of adjuster are the given deviate with feedback voltage of output voltage, and output has determined the size of duty ratio.
The purpose of introducing integral element in adjuster is in order to eliminate static difference/raising precision.When error is very large, adopt the strongest control inputs method, when little error, introduced the control algolithm that integration separates.So both keep integral action, reduced again overshoot/improved response speed, so that the control performance performance has had larger improvement.Be implemented as follows.
Annotate: e (n) is control deviation, the maximum deviation of e+ for setting, the minimum deflection of e-for setting.
1) represent that when e (n)＞e+ this moment, value of feedback was far longer than set-point, duty ratio directly exports 0;
2) when e (n)＜e-, expression value of feedback this moment is far smaller than set-point, and duty ratio directly exports 1;
3) set a threshold values ξ, when | e (n) | during＞ξ, adopt the P algorithm, can avoid larger overshoot, make again system that faster response is arranged simultaneously, this moment, PWM equaled PWM0+Kp*e (n);
4) when deviation hour, adopt the PI algorithm, this moment, PWM equaled PWM0+Kp*e (n)+Ki*e (n)+IO.
Advantage of the present invention: adopt cpu chip to process numerically controlled mode, replace original simulation control theory, generating excitation part still adopts simulation control, guarantees the safety of generator.Structure understands, control simple and reliablely, has the former function of intelligentized newspaper; be applicable to the aero-engine ground run, go for 2 types of alternating current generator Loading Control, and simple to operate; fault analysis and handling is quick, realizes a plurality of defencive function controls by programming.The integrated circuit board pattern is adopted in whole design, easy accessibility, and external aviation plug is connected with the test bay system, does not change the control circuit of original test bay, and economy is reliably convenient.
Description of drawings
Fig. 1 is structured flowchart of the present invention;
Fig. 2 is engine voltage-regulating system principle sketch of the present invention;
Fig. 3 is power supply processing module of the present invention;
Fig. 4 is voltage signal processing module of the present invention;
Fig. 5 is current signal processing module of the present invention;
Fig. 6 is power transfer module of the present invention;
Fig. 7 is cpu central processing unit of the present invention;
Fig. 8 is exciting current driver module of the present invention;
Fig. 9 is switching input module of the present invention;
Figure 10 is switching value output module of the present invention;
Figure 11 is control system structural representation of the present invention.
Embodiment
The present invention reaches by reference to the accompanying drawings embodiment and is described in detail.
Specification index:
Operating voltage: AC220V, 10A;
Box volume: 450 * 300 * 250
Important technological parameters: the conversion of 3 tunnel+3V/400HZ alternating voltage, the conversion of 3 tunnel+3V/400HZ alternating current;
The hardware protection of overcurrent-overvoltage signal: the input of 3 tunnel+27V switching value, the output of 1 tunnel+27V switching value;
Communication modes: two-way RS232 communication;
Presentation Function: can show the output of 9 road signals simultaneously;
This device comprises cabinet, switching value output module, switching input module, field power supply driver module, cpu central processing unit, power transfer module, power supply processing module, voltage signal processing module, current signal processing module, aviation plug input interface, aviation plug output interface, fault and state indication interface, shift knob and plug input interface, communication interface and data Displaying Meter as shown in Figure 1; Wherein switching value output module, switching input module, field power supply driver module, cpu central processing unit, power transfer module, power supply processing module, voltage signal processing module and current signal processing module are assemblied in the cabinet;
Control device electrical principle system diagram as shown in Figure 2.
Power supply processing module as shown in Figure 3; 24V DC power supply by the output of AC/DC module; through front end C19 C20 after the filtering of C17; by by Q1 Q2 the overvoltage crowbar that forms of Z2 and related resistors; after input voltage surpasses 33V; can guarantee that its voltage through overvoltage crowbar is 33V, to guarantee that back DC/DC module can be by high electrical breakdown.U1 U2 be the DC/DC modular converter, with the 24V direct voltage is converted to+12V ,-12V ,+secondary power supply of 5V, voltage supplied signal processing module and current signal processing module are used.
The voltage signal processing module as shown in Figure 4, behind the single-phase voltage process T1 transducer of input, input voltage is converted to corresponding with it current signal, taken a sample by R2a subsequently, again be converted to voltage signal, this voltage signal is sine wave signal proportional to input voltage, behind the full bridge rectifier through N1A, N1B, N2A composition, pass through again the second-order filter circuit that is formed by N2B, make alternating signal be converted to d. c. voltage signal, in fact this direct voltage amplitude is exactly sinusoidal wave effective value after the conversion.Simultaneously, behind comparator N10a, be converted to the square-wave signal of 400HZ through the sine wave signal after the transducer decay, after optocoupler E1a isolation, send into the IO mouth of CPU, so that CPU gathers, determine the frequency of input voltage.
Current signal processing module as shown in Figure 5, behind the monophase current process N1 transducer of input, input current is converted to corresponding with it voltage signal, after the N20 isolation, behind the full bridge rectifier through N4A, N4B composition, second-order filter circuit through being comprised of N5B makes alternating signal be converted to d. c. voltage signal again, and in fact this direct voltage amplitude is exactly sinusoidal wave effective value after the conversion.
Power transfer module as shown in Figure 6, if this main circuit general+5V power supply is converted to 1.8V and 3.3V power supply that CPU power supply needs, to guarantee that CPU can work.
Cpu central processing unit adopts Philip LPC2103, as shown in Figure 7, the CPU central processing circuit mainly is comprised of reset chip D3, communication chip D2, host CPU chip D1, storage chip D4, reset chip is mainly finished the electrification reset to CPU, and in the CPU normal course of operation, as power monitoring chip, to guarantee that CPU is carried out low-voltage to be resetted.Communication chip is mainly finished the exchanges data of the logical terminal display module of CPU, and mainly the Transistor-Transistor Logic level through CPU output is converted to serial ports of computers acceptable RS232 level, to guarantee the reliability of data transmission distance and transmission.Storage chip is used for some static variables of storage and nominal data.The host CPU chip adopts LPC2103, as the carrier of control software, is the core of system, finishes various computings and logic judgement with intelligent form, exports at any time a duty cycle signals to the exciting current driver module.
The exciting current driver module as shown in Figure 8, this circuit is the electric current output driving circuit of magnet exciting coil, the duty cycle signals of being exported as calculated by CPU is after the E10 isolation drive, by direct control metal-oxide-semiconductor V80, be the pwm signal of 34V with adding voltage on the magnet exciting coil, utilize the inductance characteristic of magnet exciting coil, when the metal-oxide-semiconductor conducting, electric current increases in the coil, when closing, MOS has no progeny, inductive current through R201 the continuous current circuit that forms of R202 and V103 discharge, by the cycle of control PWM, can guarantee in the inductance that electric current is in continuous state and can not stops, and keep with the proportional size of current of duty ratio in the pwm signal, thereby can by regulate the duty ratio of pwm signal, adjust the exciting current size, thereby adjust the size that generator sends voltage.
Switching input module as shown in Figure 9, this circuit is switching value input circuit, the filter circuit that forms through RC carries out filtering to input signal, pass through light-coupled isolation again after, be converted to+voltage signal of 3.3v, to guarantee that CPU can normally identify.
Switching value output module as shown in figure 10, this circuit is switching value output circuit, through light-coupled isolation, metal-oxide-semiconductor is added to the 24V direct voltage in the load after driving, and finishes the 3.3V level to the conversion of 24V level by the switching value signal of cpu port output.
The input J2 of shift knob and plug input interface connecting valve amount input module, the output J5 of switching input module connects the input of cpu central processing unit, the output J5 of power supply processing module connects respectively power transfer module, the input of voltage signal processing module and current signal processing module, power transfer module, the voltage signal processing module is connected output and is connected respectively the input of cpu central processing unit with current signal processing module, the aviation plug input interface connects the input of voltage signal processing module and current signal processing module, the output of cpu central processing unit is connecting valve amount output module respectively, the field power supply driver module, the input of communication interface and data Displaying Meter, the output of switching value output module connects fault and state indication interface, and the output of field power supply driver module connects the aviation plug output interface.
The control system of this device comprises 7 modules, as shown in figure 11, is respectively: hardware platform initialization module, signals collecting and processing module, pid algorithm module, signal output module, communication module, task scheduling modules and monitoring and protection module.
The hardware platform initialization module: finish the initialization to this hardware platform equipment, initialization apparatus comprises house dog, IO port, serial communication, PWM output equipment, interrupt vector, clock and AD conversion.
Signals collecting and processing module: finish the analog acquisition of three-phase current, voltage signal and filtering and process, the collection of three-phase frequency signal is processed with filtering, the collection of three road 27V switching value input signals and disappear and tremble processing.
Pid algorithm module: by the voltage controller of setting, according to the three-phase voltage, the current signal that gather, adopt pid algorithm to calculate pwm control signal.
Signal output module: by the IO port realize " throws off horizontally turn, lubricating oil pressure is low, lubricating oil pressure is high, frequency is low, hand over the state of sending out " etc. the switching value signal export; By timer the PWMM waveform that the pid algorithm module calculates is exported.
Communication module: realize the communication function with host computer; Communication refresh cycle 1S; Data head is 0xAAAAAAAAAA in the agreement, and data tail 0xbb has 54 byte datas.
Task scheduling modules: the Time Resource Scheduling of realizing signal acquisition process, pid algorithm module, signal output, communication module, monitoring and protection module distributes.
Monitoring and protection module: realize desired generator protection function.
The present invention controls software can realize alternating current generator 115V constant voltage control function, generator condition monitoring and defencive function.
1. control software supervision alarm function is as follows:
A) when engine N2 rotating speed being arranged greater than 57%, and the low alarm signal of output lubricating oil pressure when collecting the lubricating oil pressure low signal;
B) when engine N2 rotating speed being arranged greater than 57%, and the high alarm signal of output oil temperature when collecting the high signal of oil temperature;
C) when engine N2 rotating speed being arranged greater than 57%, during and three-phase voltage frequency＜370Hz, output under-frequency alarm signal;
D) when engine N2 rotating speed being arranged greater than 57%, the output lubricating oil pressure is low, oil temperature is high, during the arbitrary road of under-frequency three tunnel alarm signals, 3 seconds afterwards output throw off permanent rotaring signal.
E) when engine N2 rotating speed being arranged greater than 57%, and when pressure reduction is greater than 5V between the three-phase voltage, stop exciting current output;
F) all do not collect when three-phase voltage, output is handed over and is sent out a status signal.
2. control software constant voltage is controlled function
The control strategy that native system mainly adopts is the PWM control mode.One of key character of PWM control mode is that the duty ratio size is determined by the output of PI algorithm.For the response speed that improves system/the reduce overshoot of system, the PI control algolithm that the design has adopted integration to separate, the input variable of adjuster are the given deviate with feedback voltage of output voltage, and output has determined the size of duty ratio.
The purpose of introducing integral element in adjuster is in order to eliminate static difference/raising precision.When error is very large, adopt the strongest control inputs method, when little error, introduced the control algolithm that integration separates.So both keep integral action, reduced again overshoot/improved response speed, so that the control performance performance has had larger improvement.Be implemented as follows.
Annotate: e (n) is control deviation, the maximum deviation of e+ for setting, the minimum deflection of e-for setting.
1) when e (n)＞e+, expression value of feedback this moment is far longer than set-point, and duty ratio directly exports 0;
2) when e (n)＜e-, expression value of feedback this moment is far smaller than set-point, and duty ratio directly exports 1;
3) set a threshold values ξ, when | e (n) | during＞ξ, adopt the P algorithm, can avoid larger overshoot, make again system that faster response is arranged simultaneously, this moment, PWM equaled PWM0+Kp*e (n);
4) when deviation hour, adopt the PI algorithm, this moment, PWM equaled PWM0+Kp*e (n)+Ki*e (n)+IO.
The method of operation of this device
1) connects aviation plug on the control device rear board;
2) mains switch on the connection panel;
3) greater than 57% the time, system comes into operation engine running automatically to N2, begins to control the generator generating, voltage 115V/400HZ, and system regulates duty ratio according to voltage fluctuation in real time, guarantees voltage constant;
4) when alarm failure occurring, system's meeting automatic decision failure condition is delayed time and was made protection control in 3 seconds, and the way switch amount of exporting is thrown off the perseverance dress of generator, protects generator, carries out simultaneously alarm indication, and lights trouble light;
5) automatically withdraw from control when generator speed is lower than 57% system, generator stops generating;
6) when not using this device, power supply is turned off.
Claims (1)
1. aero-engine ground run alternating current machine add load control is characterized in that: this device comprises cabinet, switching value output module, switching input module, field power supply driver module, cpu central processing unit, power transfer module, power supply processing module, voltage signal processing module, current signal processing module, aviation plug input interface, aviation plug output interface, fault and state indication interface, shift knob and plug input interface, communication interface and data Displaying Meter; The input of shift knob and plug input interface connecting valve amount input module, the output of switching input module connects the input of cpu central processing unit, the output of power supply processing module connects respectively power transfer module, the input of voltage signal processing module and current signal processing module, power transfer module, the voltage signal processing module is connected output and is connected respectively the input of cpu central processing unit with current signal processing module, the aviation plug input interface connects the input of voltage signal processing module and current signal processing module, the output of cpu central processing unit is connecting valve amount output module respectively, the field power supply driver module, the input of communication interface and data Displaying Meter, the output of switching value output module connects fault and state indication interface, and the output of field power supply driver module connects the aviation plug output interface;
The control system of this device comprises 7 modules, is respectively: hardware platform initialization module, signals collecting and processing module, pid algorithm module, signal output module, communication module, task scheduling modules and monitoring and protection module;
The hardware platform initialization module: finish the initialization to this hardware platform equipment, initialization apparatus comprises house dog, IO port, serial communication, PWM output equipment, interrupt vector, clock and AD conversion;
Signals collecting and processing module: finish the analog acquisition of three-phase current, voltage signal and filtering and process, the collection of three-phase frequency signal is processed with filtering, the collection of three road 27V switching value input signals and disappear and tremble processing;
Pid algorithm module: by the voltage controller of setting, according to the three-phase voltage, the current signal that gather, adopt pid algorithm to calculate pwm control signal;
Signal output module: realize to throw off by the IO port horizontally turn, lubricating oil pressure is low, lubricating oil pressure is high, frequency is low, hand over the state of sending out, the output of switching value signal; By timer the PWMM waveform that the pid algorithm module calculates is exported;
Communication module: realize the communication function with host computer;
Task scheduling modules: the Time Resource Scheduling of realizing signal acquisition process, pid algorithm module, signal output, communication module, monitoring and protection module distributes;
Monitoring and protection module: realize desired generator protection function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110029836 CN102158162B (en) | 2011-01-27 | 2011-01-27 | Loading control device of alternating current (AC) motor for ground run up test of aircraft engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110029836 CN102158162B (en) | 2011-01-27 | 2011-01-27 | Loading control device of alternating current (AC) motor for ground run up test of aircraft engine |
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| CN102158162A CN102158162A (en) | 2011-08-17 |
| CN102158162B true CN102158162B (en) | 2013-02-27 |
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| CN 201110029836 Expired - Fee Related CN102158162B (en) | 2011-01-27 | 2011-01-27 | Loading control device of alternating current (AC) motor for ground run up test of aircraft engine |
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Families Citing this family (3)
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| DE102011004205A1 (en) * | 2011-02-16 | 2012-08-16 | Robert Bosch Gmbh | System and method for identifying, diagnosing, maintaining and repairing a vehicle |
| CN103199783A (en) * | 2013-04-02 | 2013-07-10 | 清华大学 | Automotive generator voltage controller based on pulse width modulation and control method |
| CN109557418A (en) * | 2018-12-12 | 2019-04-02 | 国网黑龙江省电力有限公司电力科学研究院 | It is a kind of for detecting the moveable platform of power distribution network |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1128348A (en) * | 1995-07-03 | 1996-08-07 | 北京朝阳兰天航空综合设备厂 | Aero-generator power supply comprehensive experiment table |
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2011
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1128348A (en) * | 1995-07-03 | 1996-08-07 | 北京朝阳兰天航空综合设备厂 | Aero-generator power supply comprehensive experiment table |
Non-Patent Citations (5)
| Title |
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| 吕雪燕.《某型飞机发动机综合测试仪的研制》.《中国优秀硕士学位论文全文数据库》.2005,全文. * |
| 徐玮.液体火箭发动机试车测量系统的研制.《导弹与航天运载技术》.1996,(第04期),42-44. * |
| 石晨等.微机数据采集和处理系统在航空发动机试车台上的应用.《测控技术》.1986,(第03期),33-35. * |
| 赵香桂等.基于DSP2812的全数字交流伺服系统的实现.《电气传动自动化》.1924,第32卷(第06期),23-25,47. * |
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