CN102914973A - 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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- CN102914973A CN102914973A CN2012104024881A CN201210402488A CN102914973A CN 102914973 A CN102914973 A CN 102914973A CN 2012104024881 A CN2012104024881 A CN 2012104024881A CN 201210402488 A CN201210402488 A CN 201210402488A CN 102914973 A CN102914973 A CN 102914973A
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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 of engine controller hardware-in-loop simulation test, relate to the high-precision analog that uses 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 the control system simulation field.Generally can use several resistance type sensors in the engine control system, such as thermal resistance temperature sensor, the pressure transducer that arm resistance changes with the pressure size, potentiometer type position transducer etc.In engine controller hardware-in-loop simulation pilot system, need to be according to the output of the engine simulation model signal intensity of artifical resistance class sensor dynamically, namely need dynamically to simulate the variation of resistance, be used for consisting of the closed-loop simulation loop of control system, the real-time of artifical resistance value trace model and accuracy have directly determined 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.Following several method is adopted in the dynamic change of artifical resistance resistance usually:
(a) combination by different resistances in resistance box realizes variable resistor with relay or electronic switch;
(b) switch semiconductor resistor with digital regulation resistance and realize variable resistor;
(c) use the driven by servomotor potentiometer to realize variable resistor;
(d) use gain control circuit and operational amplifier to form the Electronic synthesized resistor of one-port network.
In these methods,
The precision of method (a) depends on resistance and the quantity of resistance in the resistance box, and not only volume is larger, and resolution is also relatively poor, and relay contact resistance also can affect the resistance simulation precision;
Poor owing to having sealed in larger switch conduction resistance and temperature stability in the 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, is realizing that the high-precision while will bring expensive problem;
Method (d) adopts the synthetic method of electronics, by the gain control to driving voltage, thus the no-load voltage ratio of control simulation resistance value, but simulation precision is undesirable, and be confined to controller and will adopt constant voltage excitation 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 purpose is intended to solve the signal imitation problem of the resistance class sensor in the test of engine controller hardware-in-loop simulation, relate to the high-precision analog that uses 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: the Electronic synthesized resistor that is used for the test of engine controller hardware-in-loop simulation, its structure is that the anode voltage signal output end of controller circuitry and signal input part and the measuring resistance of impact damper are joined, the signal output part of impact damper and the signal input part of amplifier join, and the reference voltage signal input end of the signal output part of amplifier and gain control circuit joins; The no-load voltage ratio controllable voltage signal output part of gain control circuit and the signal input part of attenuator join; The negative terminal voltage signal input part of the signal output part of attenuator and controller joins.
Beneficial effect of the present invention: 1) form the Electronic synthesized resistor method of one-port network with respect to existing use gain control circuit and operational amplifier, the present invention is by the amplification to reference voltage signal, overcome gain control circuit and controlled serious problem affected by noise because of reference voltage signal than hour its no-load voltage ratio, thereby raising signal to noise ratio (S/N ratio), guarantee that gain control circuit is operated in rational scope, thus Effective Raise resistance simulation precision; 2) form the Electronic synthesized resistor method of one-port network with respect to existing use gain control circuit and operational amplifier, Electronic synthesized resistor circuit of the present invention adopts the insulating power supply power supply, make the earth potential of Electronic synthesized resistor circuit be independent of controller circuitry with reference to ground, thereby make the Electronic synthesized resistor circuit not only be applicable to the constant voltage excitation application circuit on common ground, but also be applicable to the controller circuitry that continuous current on ground does not encourage or constant pressure difference encourages altogether, strengthen the adaptation ability of described Electronic synthesized resistor.
Description of drawings
Accompanying drawing 1 is theory diagram of the present invention.
Accompanying drawing 2 is implementation circuit theory diagrams of the present invention.
Embodiment
Contrast Fig. 1, the structure that is used for the Electronic synthesized resistor of engine controller hardware-in-loop simulation test is: the anode voltage signal output end of controller and the signal input part of impact damper join, the signal output part of impact damper and the signal input part of operational amplifier join, and the signal input part of the signal output part of operational amplifier and Electronic synthesized resistor circuit joins; The no-load voltage ratio controllable voltage signal output part of Electronic synthesized resistor circuit and the signal input part of attenuator join; The negative terminal voltage signal input part of the signal output part of attenuator and controller joins.
Building method converts the exciting current of controller circuitry to Electronic synthesized resistor positive terminal voltage signal VR+ by measuring resistance (R0); Align the reference voltage signal that terminal voltage signal VR+ amplification-A doubly obtains gain control circuit; Consist of the control that gain control circuit is realized no-load voltage ratio (K) by DA circuit or a multiplier with external reference; The controlled voltage signal of no-load voltage ratio that gain control circuit produces is decayed 1/A doubly, obtain the negative terminal voltage signal VR-=K*VR+ of Electronic synthesized resistor; The earth potential of Electronic synthesized resistor circuit with respect to the reference of controller circuitry float; Described Electronic synthesized resistor anode and negative terminal potential difference (PD) and the ratio that flows through the exciting current of described measuring resistance are the resistance of Electronic synthesized resistor (R), be resistance (R)=(1+K) R0, control the resistance of combined resistance by the no-load voltage ratio K of ride gain control circuit.
The positive terminal voltage signal amplification-A of combined resistance is doubly obtained the reference voltage signal of gain control circuit, the controlled voltage signal of no-load voltage ratio that gain control circuit produces is decayed 1/A doubly to offset the amplification to reference voltage signal fully, obtain the negative terminal voltage signal of Electronic synthesized resistor, overcome gain control circuit and control serious problem affected by noise because of reference voltage signal than hour its no-load voltage ratio, thereby raising signal to noise ratio (S/N ratio), guarantee that gain control circuit is operated in rational scope, thus Effective Raise resistance simulation precision.
The Electronic synthesized resistor circuit supply, the use insulating power supply is supplied with, make the earth potential of Electronic synthesized resistor circuit be independent of controller circuitry with reference to ground, make the Electronic synthesized resistor circuit not only be applicable to the constant voltage excitation application circuit on common ground, but also be applicable to the controller circuitry that continuous current on ground does not encourage or constant pressure difference encourages altogether, 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 the left side is the Electronic synthesized resistor circuit theory diagrams.The employing of electronics combiner circuit+/-the 15V Power supply, ground reference is BGND, and AGND and BGND allow to be on the different potentials, and the in other words reference of electronics combiner circuit ground allows to float with respect to controller.
In the electronics combiner circuit, U1, U2, U4 are precision operational-amplifier OP77, are used separately as to be impact damper, amplifier and attenuator; U3 is multiplier AD633, as gain control circuit.Be used separately as and be 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.
The electronics combiner circuit has 3 external signal ports, and wherein VR+ and VR-are the resistance interface of controller, positive terminal potential and the negative terminal current potential of the corresponding combined resistance of its current potential; VC is the control port of electronics combiner circuit, the height correspondence of its voltage the no-load voltage ratio of gain control circuit, during VC=-10～10V to strain ratio K=-1～1.
The exciting current of controller flows through the R0 generation with respect to the current potential VR+ of electronics combiner circuit, and capacitor C 0 in parallel is in order to absorb the noise in the exciting current on resistance R 0.VR+ enters amplifier U2 behind buffer circuit U1, U2 consists of an inverting amplifier, gain to be-R2/R1=-50, so the reference voltage of gain control circuit is-50*VR+.Capacitor C 5 in parallel on the resistance R 2 is for the high frequency noise in the filtered signal.
Gain control circuit is by multiplier U3(AD633) realize.Multiplier U3(AD633) output terminal W is multiplier U3(AD633) the product of the no-load voltage ratio K that determines of the control voltage VC of reference voltage-50*VR+ and control end Y1 end of X1 end, so multiplier U3(AD633) the voltage held of output terminal W be-50*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 in the electronics combiner circuit and P2 are zero potentiometers, to eliminate zero offset in the electronics combiner circuit.Adjusting zero method is, is 0 o'clock at the controller exciting current, and it is 0 that adjusting P1 makes the X1 terminal potential of multiplier U3; VC is 0 o'clock at control voltage, and the output terminal VR-of impact damper U4 is 0 when regulating zero potentiometer P2.
Claims (4)
1. the Electronic synthesized resistor that is used for the test of engine controller hardware-in-loop simulation, it is characterized in that the anode voltage signal output end of controller circuitry and the signal input part of impact damper join, the signal output part of impact damper and the signal input part of amplifier join, and the reference voltage signal input end of the signal output part of amplifier and gain control circuit joins; The no-load voltage ratio controllable voltage signal output part of gain control circuit and the signal input part of attenuator join; The negative terminal voltage signal input part of the signal output part of attenuator and controller joins.
2. the building method of the Electronic synthesized resistor for engine controller hardware-in-loop simulation test as claimed in claim 1 is characterized in that converting the exciting current of controller circuitry to Electronic synthesized resistor positive terminal voltage signal VR+ by measuring resistance (R0); Align reference voltage signal-A*VR+ that terminal voltage signal VR+ amplification-A doubly obtains gain control circuit; Consist of the control that gain control circuit is realized no-load voltage ratio (K) by DA circuit or a multiplier with external reference; The controlled voltage signal of no-load voltage ratio that gain control circuit produces is decayed 1/A doubly, obtain the negative terminal voltage signal VR-=-K*VR+ of Electronic synthesized resistor; The earth potential of Electronic synthesized resistor circuit with respect to the reference of controller circuitry float; Described Electronic synthesized resistor anode and negative terminal potential difference (PD) and the ratio that flows through the exciting current of described measuring resistance are the resistance of Electronic synthesized resistor (R), be resistance (R)=(1+K) R0, control the resistance of combined resistance by the no-load voltage ratio K of ride gain control circuit.
3. the building method of the Electronic synthesized resistor for engine controller hardware-in-loop simulation test according to claim 2, it is characterized in that the positive terminal voltage signal amplification-A of combined resistance is doubly obtained the reference voltage signal of gain control circuit, the controlled voltage signal of no-load voltage ratio that gain control circuit produces is decayed 1/A doubly to offset the amplification to reference voltage signal fully, obtain the negative terminal voltage signal of Electronic synthesized resistor, overcome gain control circuit and control serious problem affected by noise because of reference voltage signal than hour its no-load voltage ratio, thereby raising signal to noise ratio (S/N ratio), guarantee that gain control circuit is operated in rational scope, thus Effective Raise resistance simulation precision.
4. the building method of the Electronic synthesized resistor for engine controller hardware-in-loop simulation test according to claim 2, it is characterized in that the Electronic synthesized resistor circuit supply, the use insulating power supply is supplied with, make the earth potential of Electronic synthesized resistor circuit be independent of controller circuitry with reference to ground, make the Electronic synthesized resistor circuit not only be applicable to the constant voltage excitation application circuit on common ground, but also be applicable to the controller circuitry that continuous current on ground does not encourage or constant pressure difference encourages altogether, strengthen the adaptation ability of described Electronic synthesized resistor.
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| CN201210402488.1A CN102914973B (en) | 2012-10-22 | 2012-10-22 | Electronic combined resistor for engine controller object in loop simulation test |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104122090A (en) * | 2014-07-17 | 2014-10-29 | 白志平 | Automobile engine system diagnostic instrument |
| CN105022013A (en) * | 2014-04-30 | 2015-11-04 | 惠州市德赛西威汽车电子股份有限公司 | Programmable resistance calibration instrument |
| CN105185203A (en) * | 2015-09-06 | 2015-12-23 | 黄山学院 | Experiment apparatus for virtual object ratio control system |
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| US4013975A (en) * | 1975-03-31 | 1977-03-22 | Kabushikikaisha Yokogawa Denki Seisakusho | Variable resistance circuit |
| CN1545206A (en) * | 2003-11-11 | 2004-11-10 | 浙江中控技术股份有限公司 | Digital type rheostat device |
| DE102006045279A1 (en) * | 2006-01-31 | 2007-08-09 | Micro-Epsilon Messtechnik Gmbh & Co. Kg | Circuit for setting an impedance |
| CN101026300A (en) * | 2007-03-26 | 2007-08-29 | 中控科技集团有限公司 | Resistance output circuit |
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2012
- 2012-10-22 CN CN201210402488.1A patent/CN102914973B/en not_active Expired - Fee Related
Patent Citations (4)
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|---|---|---|---|---|
| US4013975A (en) * | 1975-03-31 | 1977-03-22 | Kabushikikaisha Yokogawa Denki Seisakusho | Variable resistance circuit |
| CN1545206A (en) * | 2003-11-11 | 2004-11-10 | 浙江中控技术股份有限公司 | Digital type rheostat device |
| DE102006045279A1 (en) * | 2006-01-31 | 2007-08-09 | Micro-Epsilon Messtechnik Gmbh & Co. Kg | Circuit for setting an impedance |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105022013A (en) * | 2014-04-30 | 2015-11-04 | 惠州市德赛西威汽车电子股份有限公司 | Programmable resistance calibration instrument |
| CN104122090A (en) * | 2014-07-17 | 2014-10-29 | 白志平 | Automobile engine system diagnostic instrument |
| 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 |
| CN105185203A (en) * | 2015-09-06 | 2015-12-23 | 黄山学院 | Experiment apparatus for virtual object ratio control system |
| 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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