CN102914973B - Electronic combined resistor for engine controller object in loop simulation test - Google Patents
Electronic combined resistor for engine controller object in loop simulation test Download PDFInfo
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- CN102914973B CN102914973B CN201210402488.1A CN201210402488A CN102914973B CN 102914973 B CN102914973 B CN 102914973B CN 201210402488 A CN201210402488 A CN 201210402488A CN 102914973 B CN102914973 B CN 102914973B
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- 238000004088 simulation Methods 0.000 title claims abstract description 20
- 230000005284 excitation Effects 0.000 claims abstract description 12
- 230000006978 adaptation Effects 0.000 claims description 4
- 230000003321 amplification Effects 0.000 claims description 3
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 3
- 230000003044 adaptive effect Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 11
- 230000015572 biosynthetic process Effects 0.000 description 9
- 238000003786 synthesis reaction Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
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- Testing Electric Properties And Detecting Electric Faults (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The invention discloses an electronic combined resistor for an engine controller object in a loop simulation test. According to the electronic combined resistor, a positive voltage signal output end of a controller circuit is connected with a signal input end of a buffer and a standard resistor; a signal output end of the buffer is connected with a signal input end of an amplifier; a signal output end of the amplifier is connected with a reference voltage input end of a gain control circuit; a variable ratio controllable voltage signal output end of the gain control circuit is connected with a signal input end of an attenuator; and a signal output end of the attenuator is connected with a negative voltage signal input end of the controller. The electronic combined resistor has the advantages that a signal to noise ratio is improved, the gain control circuit works in a reasonable range, and the resistance simulation precision is effectively improved; and an isolating power supply is used for supplying power, and the ground potential of an electronic combined resistor circuit is independent of the reference ground of the controller circuit, therefore, the electronic combined resistor circuit is suitable for a common-grounded constant voltage excitation application circuit and a non-common-grounded constant current excitation or constant differential pressure excitation controller circuit, and the adaptive capacity of the circuit is improved.
Description
Technical field
The present invention is used for the signal imitation of the resistance class sensor in the test of engine controller hardware-in-loop simulation, relate to the high-precision analog using operational amplifier, digital to analog converter or multiplier to realize resistance change, and the dissimilar resistance signal modulate circuit interface of energy adaptive controller, belong to control system simulation field.Generally several resistance type sensor can be used, such as thermal resistance temperature sensor, the pressure transducer that arm resistance changes with pressure size, potentiometer type position transducer etc. in engine control system.In engine controller hardware-in-loop simulation pilot system, need the signal intensity according to the output of engine simulation model dynamically artifical resistance class sensor, namely the change of dynamically simulating resistance is needed, for forming the closed-loop simulation loop of control system, the real-time of artifical resistance value trace model and accuracy directly determine validity and the degree of confidence of analogue system.
Background technology
Resistance class sensor generally has: thermal resistance temperature sensor, potentiometric displacement transducer, resistance strain type pressure sensor etc.The dynamic change of artifical resistance resistance adopts following several method usually:
A () uses relay or electronic switch to realize variable resistor by the combination of different resistance in resistance box;
B () uses digital regulation resistance to switch semiconductor resistor and realizes variable resistor;
C () uses driven by servomotor potentiometer to realize variable resistor;
D () uses the Electronic synthesized resistor of gain control circuit and operational amplifier composition one-port network.
In these methods,
The precision of method (a) depends on resistance and the quantity of resistance in resistance box, and not only volume is comparatively large, and resolution is also poor, and relay contact resistance also can affect resistance simulation precision;
Owing to having sealed in larger switch conduction resistance and temperature stability is poor in method (b), its precision can not be guaranteed;
Method (c) volume is large, and its precision depends on the control accuracy of position transducer and motor, will bring the problem of high cost realizing high-precision while;
Method (d) adopts the method for electronic synthesis, by controlling the gain of driving voltage, thus the no-load voltage ratio of control simulation resistance value, but simulation precision is undesirable, and be confined to controller to adopt constant voltage encourage and resistance negative terminal and simulator altogether, the adaptation ability of simulator is poor.
Summary of the invention
What the present invention proposed is a kind of Electronic synthesized resistor for the test of engine controller hardware-in-loop simulation, its object is intended to the signal imitation problem of the resistance class sensor solved in the test of engine controller hardware-in-loop simulation, relate to the high-precision analog using operational amplifier, digital to analog converter or multiplier to realize resistance change, and the dissimilar resistance signal modulate circuit interface of energy adaptive controller.
Technical solution of the present invention: for the Electronic synthesized resistor of engine controller hardware-in-loop simulation test, its structure is that the anode voltage signal output end of controller circuitry connects with the signal input part of impact damper and measuring resistance, the signal output part of impact damper connects with the signal input part of amplifier, and the signal output part of amplifier connects with the reference voltage signal input end of gain control circuit; The no-load voltage ratio controllable voltage signal output part of gain control circuit connects with the signal input part of attenuator; The signal output part of attenuator connects with the negative terminal voltage signal input part of controller.
Beneficial effect of the present invention: the Electronic synthesized resistor method 1) forming one-port network relative to existing use gain control circuit and operational amplifier, the present invention is by the amplification to reference voltage signal, overcome gain control circuit because of reference voltage signal less time its no-load voltage ratio control serious problem affected by noise, thus raising signal to noise ratio (S/N ratio), ensure that gain control circuit is operated in rational scope, thus effectively improve resistance simulation precision; 2) the Electronic synthesized resistor method of one-port network is formed relative to existing use gain control circuit and operational amplifier, Electronic synthesized resistor circuit of the present invention adopts insulating power supply to power, make the earth potential of Electronic synthesized resistor circuit independent of controller circuitry with reference to ground, thus make Electronic synthesized resistor circuit not only be applicable to the constant voltage excitation application circuit on common ground, but also be applicable to the continuous current excitation on not ground altogether or the controller circuitry of constant pressure difference excitation, strengthen the adaptation ability of described Electronic synthesized resistor.
Accompanying drawing explanation
Accompanying drawing 1 is theory diagram of the present invention.
Accompanying drawing 2 is specific embodiment of the invention circuit theory diagrams.
Embodiment
Contrast Fig. 1, structure for the Electronic synthesized resistor of engine controller hardware-in-loop simulation test is: the anode voltage signal output end of controller connects with the signal input part of impact damper, the signal output part of impact damper connects with the signal input part of operational amplifier, and the signal output part of operational amplifier connects with the signal input part of Electronic synthesized resistor circuit; The no-load voltage ratio controllable voltage signal output part of Electronic synthesized resistor circuit connects with the signal input part of attenuator; The signal output part of attenuator connects with the negative terminal voltage signal input part of controller.
Building method, converts the exciting current of controller circuitry to Electronic synthesized resistor positive terminal voltage signal VR+ by measuring resistance (R0); Align terminal voltage signal VR+ and amplify the reference voltage signal that-A doubly obtains gain control circuit; The control that gain control circuit realizes no-load voltage ratio (K) is formed by being with the DA circuit of external reference or a multiplier; Voltage signal decay 1/A times that the no-load voltage ratio produced by gain control circuit is controlled, obtains the negative terminal voltage signal VR-=K*VR+ of Electronic synthesized resistor; The earth potential of Electronic synthesized resistor circuit relative to controller circuitry reference float; Described Electronic synthesized resistor anode and negative terminal potential difference (PD) are the resistance of Electronic synthesized resistor (R) with the ratio of the exciting current flowing through described measuring resistance, i.e. resistance (R)=(1+K) R0, controls the resistance of combined resistance by the no-load voltage ratio K of ride gain control circuit.
Positive for combined resistance terminal voltage signal is amplified the reference voltage signal that-A doubly obtains gain control circuit, by voltage signal decay 1/A controlled for the no-load voltage ratio of gain control circuit generation doubly to offset the amplification to reference voltage signal completely, obtain the negative terminal voltage signal of Electronic synthesized resistor, overcome gain control circuit because of reference voltage signal less time its no-load voltage ratio control serious problem affected by noise, thus raising signal to noise ratio (S/N ratio), ensure that gain control circuit is operated in rational scope, thus effectively improve resistance simulation precision.
Electronic synthesized resistor circuit is powered, use insulating power supply supplies, make the earth potential of Electronic synthesized resistor circuit independent of controller circuitry with reference to ground, Electronic synthesized resistor circuit is made not only to be applicable to the constant voltage excitation application circuit on common ground, but also be applicable to the continuous current excitation on not ground altogether or the controller circuitry of constant pressure difference excitation, strengthen the adaptation ability of described Electronic synthesized resistor.
Embodiment
As shown in Figure 2, right side box indicating controller, it is with reference to status AGND, and left side is Electronic synthesized resistor circuit theory diagrams.Electronic synthesis circuit adopts +/-15V Power supply, and ground reference is that BGND, AGND and BGND allow to be on different potentials, and the reference ground of electronic synthesis circuit allows to float relative to controller in other words.
In electronic synthesis circuit, U1, U2, U4 are precision operational-amplifier OP77, are used separately as impact damper, amplifier and attenuator; U3 is multiplier AD633, as gain control circuit.Be used separately as impact damper, amplifier and attenuator; C1, C2, C3, C4, C6, C7, C9, C10 are the electric capacity of 0.1uF, as the power supply coupling capacitor of respective chip, to reduce the impact of power supply noise.
Electronic synthesis circuit has 3 external signal ports, and wherein VR+ and VR-is the resistance interface of controller, the positive terminal potential of the corresponding combined resistance of its current potential and negative terminal current potential; VC is the control port of electronic synthesis circuit, and the no-load voltage ratio of gain control circuit that the height of its voltage is corresponding, to strain ratio K=-1 ~ 1 during VC=-10 ~ 10V.
The exciting current of controller flows through the current potential VR+ of R0 generation relative to electronic synthesis circuit, and on resistance R0, an electric capacity C0 in parallel is the noise in order to absorb in exciting current.VR+ enters amplifier U2 after buffer circuit U1, and U2 forms an inverting amplifier, and gain is-R2/R1=-50, and therefore the reference voltage of gain control circuit is-50*VR+.Electric capacity C5 in parallel on resistance R2 is in order to the high frequency noise in filtered signal.
Gain control circuit is by multiplier U3(AD633) realize.Multiplier U3(AD633) output terminal W be multiplier U3(AD633) the product of no-load voltage ratio K that determines of the control voltage VC that hold of reference voltage-50*VR+ and the control end Y1 of X1 end, so multiplier U3(AD633) the voltage of output terminal W end be-50*K*VR+.
Resistance R3, resistance R4 form the voltage divider of 50:1, coordinate form the attenuator that attenuation ratio is 1/50 with impact damper U4, and the electric capacity in parallel with the cloudy R4 of electricity is in order to the high frequency noise in filtered signal, so obtain combined resistance negative terminal current potential VR-=-K*VR+.
According to Ohm law, combined resistance R=(VR+-VR-)/(VR+/R0)=(1+K) R0
Get R0=100 ohm, so have
During VC=10V, K=1, R=2*R0=200 ohm;
During VC=0V, K=0, R=R0=100 ohm;
During VC=-10V, K=-1, R=0 ohm.
P1 and P2 in electronic synthesis circuit is zero potentiometer, to eliminate zero offset in electronic synthesis circuit.Adjusting zero method is, when controller exciting current is 0, regulates P1 to make the X1 terminal potential of multiplier U3 be 0; When control voltage VC is 0, during adjustment zero potentiometer P2, the output terminal VR-of impact damper U4 is 0.
Claims (1)
1. for the Electronic synthesized resistor of engine controller hardware-in-loop simulation test, it is characterized in that the anode voltage signal output end of controller circuitry connects with the signal input part of impact damper, the signal output part of impact damper connects with the signal input part of amplifier, and the signal output part of amplifier connects with the reference voltage signal input end of gain control circuit; The no-load voltage ratio controlled voltage signal output part of gain control circuit connects with the signal input part of attenuator; The signal output part of attenuator connects with the negative terminal voltage signal input part of controller; The exciting current of controller circuitry is converted to Electronic synthesized resistor positive terminal voltage signal VR+ by measuring resistance R0; Align terminal voltage signal VR+ and amplify the reference voltage signal-A*VR+ that-A doubly obtains gain control circuit; The control that gain control circuit realizes no-load voltage ratio K is formed by being with the DA circuit of external reference or a multiplier; Voltage signal decay 1/A times that the no-load voltage ratio produced by gain control circuit is controlled, obtains the negative terminal voltage signal VR-=-K*VR+ of Electronic synthesized resistor; The earth potential of Electronic synthesized resistor circuit relative to controller circuitry reference float; Described Electronic synthesized resistor anode and negative terminal potential difference (PD) are the resistance of Electronic synthesized resistor R with the ratio of the exciting current flowing through described measuring resistance, i.e. resistance R=(1+K) R0, controls the resistance of combined resistance by the no-load voltage ratio K of ride gain control circuit; Positive for combined resistance terminal voltage signal is amplified the reference voltage signal that-A doubly obtains gain control circuit, by voltage signal decay 1/A controlled for the no-load voltage ratio of gain control circuit generation doubly to offset the amplification to reference voltage signal completely, obtain the negative terminal voltage signal of Electronic synthesized resistor, overcome gain control circuit because of reference voltage signal less time its no-load voltage ratio control serious problem affected by noise, thus raising signal to noise ratio (S/N ratio), ensure that gain control circuit is operated in rational scope, thus effectively improve resistance simulation precision; Electronic synthesized resistor circuit is powered, use insulating power supply supplies, make the earth potential of Electronic synthesized resistor circuit independent of controller circuitry with reference to ground, Electronic synthesized resistor circuit is made not only to be applicable to the constant voltage excitation application circuit on common ground, but also be applicable to the continuous current excitation on not ground altogether or the controller circuitry of constant pressure difference excitation, strengthen the adaptation ability of described Electronic synthesized resistor; Described Electronic synthesized resistor circuit adopts +/-15V Power supply, and Electronic synthesized resistor circuit has 3 external signal ports, and wherein VR+ and VR-is the resistance interface of controller, the positive terminal potential of the corresponding combined resistance of its current potential and negative terminal current potential; VC is the control port of Electronic synthesized resistor circuit, and the no-load voltage ratio of gain control circuit that the height of its voltage is corresponding, to strain ratio K=-1 ~ 1 during VC=-10 ~ 10V; Amplifier is inverting amplifier, and gain is-50.
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| CN105022013B (en) * | 2014-04-30 | 2017-10-24 | 惠州市德赛西威汽车电子股份有限公司 | A kind of programmable resistance tester |
| CN104122090B (en) * | 2014-07-17 | 2017-01-11 | 珠海市吉大华普仪器有限公司 | Automobile engine system diagnostic instrument |
| CN105185203B (en) * | 2015-09-06 | 2017-10-27 | 黄山学院 | The experimental provision of Virtual object ratio control system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1545206A (en) * | 2003-11-11 | 2004-11-10 | 浙江中控技术股份有限公司 | Digital type rheostat device |
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| GB1514136A (en) * | 1975-03-31 | 1978-06-14 | Yokogawa Electric Works Ltd | Variable resistance circuit |
| DE102006045279A1 (en) * | 2006-01-31 | 2007-08-09 | Micro-Epsilon Messtechnik Gmbh & Co. Kg | Circuit for setting an impedance |
| CN100490269C (en) * | 2007-03-26 | 2009-05-20 | 中控科技集团有限公司 | Resistance output circuit |
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| CN1545206A (en) * | 2003-11-11 | 2004-11-10 | 浙江中控技术股份有限公司 | Digital type rheostat device |
Non-Patent Citations (1)
| Title |
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| "合成电阻在发动机控制半物理仿真接口模拟器中的应用";张天宏 等;《航空动力学报》;20041031;第19卷(第5期);全文 * |
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