CN106842961A - The symmetrical hysteresis control method of supersonic motor servo-control system based on Stop operators - Google Patents
The symmetrical hysteresis control method of supersonic motor servo-control system based on Stop operators Download PDFInfo
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Abstract
The present invention relates to a kind of symmetrical hysteresis control method of the supersonic motor servo-control system based on Stop operators:One pedestal and the supersonic motor on pedestal are provided, supersonic motor side output shaft is connected with photoelectric encoder, opposite side output shaft is connected with flywheel inertia load, the output shaft of the flywheel inertia load is connected through shaft coupling with torque sensor, and the signal output part of the photoelectric encoder, the signal output part of the torque sensor are respectively connected to a control system;The control system is set up on the basis of stop operator compensating controllers, and the stop operators compensating controller is with minimum its Tuning function of Identification Errors, so as to obtain more preferable input and output controlled efficiency.Not only control accuracy is high for the present invention, and simple structure, compact, and using effect is good.
Description
Technical field
The present invention relates to a kind of symmetrical hysteresis control method of the supersonic motor servo-control system based on Stop operators.
Background technology
When being in proper states due to torque output in the design of existing supersonic motor servo-control system, its hysteresis
With symmetry, there is certain error when controlling cycle repeating signal.In order to improve trace performance, we devise and are based on
The supersonic motor servo-control system of stop operators symmetrical compensation control.From implementation result, it has been found that the torque of system
Length velocity relation is substantially linear, therefore can effectively promote the controlled efficiency of system based on the control of stop operators symmetrical compensation, goes forward side by side one
Step reduction system can obtain preferable dynamic characteristic for probabilistic influence degree, torque and the speed control of motor.
The content of the invention
In view of this, it is an object of the invention to provide a kind of supersonic motor servo-control system based on Stop operators
Symmetrical hysteresis control method, not only control accuracy is high, and simple structure, compact, and using effect is good.
To achieve the above object, the present invention is adopted the following technical scheme that:A kind of supersonic motor based on Stop operators is watched
Take the symmetrical hysteresis control method of control system, it is characterised in that comprise the following steps:
Step S1:One pedestal and the supersonic motor on pedestal, supersonic motor side output shaft are provided
It is connected with photoelectric encoder, opposite side output shaft is connected with flywheel inertia load, the output shaft of the flywheel inertia load
Be connected with torque sensor through shaft coupling, the signal output part of the photoelectric encoder, the torque sensor signal it is defeated
Go out end and be respectively connected to a control system;
Step S2:The control system is set up on the basis of stop operator compensating controllers, the stop operators compensation
Controller is with minimum its Tuning function of Identification Errors, so as to obtain more preferable input and output controlled efficiency;The control system
Dynamical equation be:
Wherein Ap=-B/J, BP=J/Kt> 0, CP=-1/J;B is damped coefficient, and J is rotary inertia, KtIt is current factor,
TfV () is frictional resistance torque, TLIt is loading moment, U (t) is the output torque of motor, θrT () is to be surveyed by photoelectric encoder
The position signalling for measuring.
Further, in the step S1, the control system includes supersonic motor drive control circuit, the ultrasound
Ripple motor driving controling circuit include control chip circuit and driving chip circuit, the signal output part of the photoelectric encoder with
The respective input of the control chip circuit is connected, the output end of the control chip circuit and the driving chip circuit
Respective input be connected, to drive the driving chip circuit, the driving frequency Regulate signal of the driving chip circuit
The respective input of output end and driving half-bridge circuit Regulate signal output end respectively with the supersonic motor is connected, described
Stop operator compensating controllers are arranged in the control chip circuit.
Further, in the step S1, the shaft coupling is yielding coupling.
Further, in the step S1, the supersonic motor, photoelectric encoder, torque sensor are respectively through ultrasound
Ripple motor fixed rack, photoelectric encoder fixed support, torque sensor fixed support are fixed on the pedestal.
Further, in the step S2, the hysteresis of motor torque-speed characteristics has symmetry, shows to reduce this
As the influence that causes while reducing operand, compensated using the symmetrical hysteresis of stop operators and controlled it:Stop operation symbol
Output is the function of its critical value s and input v (t), and the stop operators output of input v (t) ∈ C [0, T] can be expressed as:
Es[v] (0)=es(v(0))
Es[v] (t)=es(v(t)-v(ti)+Es[v](ti))
For ti< t < ti+1And 0≤i≤N-1,
es=min (s, max (- s, v))
Wherein 0=t0<t1<......<tl=T is the subregion of T [0, T] so that function v (t) ∈ C [0, T], C [0, T] table
Show the space of the continuous function on [0, T], in each subinterval [ti, ti+1] on be dull;
Under different threshold value s, stop operators are output as:
Above formula discretization, output are described by n stop operator, 0=s0<s1<......<sn=S, that is,:
Wherein wsThe weight of density function is represented, i.e.,
Due to Lipschitz continuitys, stop operators EsFor density function, therefore the model pair based on stop operators can be accumulated
It is Lipschitz continuous in given input v (t) ∈ C [0, T], it is monotonic operation symbol, weight that can further obtain this model
Function integrable and for just;
When the system is operating, input signal v (t) first passes through inverse system ψ, and its output enters balanced system as control signal
Φ, the mapping expected between input v (t) and output u (t) is obtained using feedforward compensation:
U (t)=Φ [ψ [v]] (t)
Initial load curve and given threshold value r based on PPI modelsiWith corresponding weight pi, obtain the two of stop operators
Individual parameter:Threshold value siWith weight wi;
Assuming that the original upload curve of PPI models is expressed as:
Wherein r ∈ [r0, rnp] and r0=0, npIt is the number of operator p, p is the operator of PPI models, riIt is the threshold of PPI models
Value;Function phip:R+→R+It is convex function and increasing function, in order to obtain the parameter of compensator, the original upload based on stop operators
Curve φsIt is defined as:
Wherein φs::R+→R+It is concave function and increasing function, nsIt is the number of operator, s ∈ [0, s0], s0It is set to big positive reality
Number, meets s0>Max (v (t)), it is ensured that the Rigid Monotony of stop Operator Models;
In order to obtain the weight and threshold value of stop Operator Models, the threshold value and initial load curve of stop Operator Models expire
Foot:
si=φr(ri) (3.16)
φs(si)=ri (3.17)
Any point B (r on initial load curve according to PPIk, φr) meeting equation (3.16) and (3.17), it is always
Corresponding points C (s can be found on the initial load curve of stop operatorsk, φs);The threshold value of stop Operator Models can be with following
Mode is related to the threshold value of PPI models:
s1=r1p0
s2=(r2-r1)p1+r2p0
s3=(r3-r1)p1+(r3-r2)p2+r3p0
sn=(rn-r1)p1+(rn-r2)p2+...+rnp0 (3.18)
Stop Operator Models wiCan be calculated as according to (3.17):
Equation group (3.19) includes (n+1) individual known variables, and the quantity of equation is n, in order to solve equation (3.19) and
Obtain weight wn, should first solve weight w0;
Using annex point as (s on the initial load curve of SPI modelsn+ 1, φs(sn+ 1)), by makingWhereinIt is arithmetic number, ξ=φ can be expressed ass(sn+1);
According to (3.16) and (3.17):
Formula (3.19) and (3.21):
Equation (3.20) can be expressed as:
W is drawn from (3.22) and (3.23)0:
The weight w of stop Operator Models is readily available finally by solution equation (3.19)i。
The present invention has the advantages that compared with prior art:The present invention is using the control of stop operators symmetrical compensation
Supersonic motor servo controller, system has significant improvement, this symmetrical compensation control energy on torque velocities tracking effect
The effective controlled efficiency for promoting system, and system is further reduced for probabilistic influence degree, improve control
Accuracy, can obtain preferable dynamic characteristic.Additionally, the device is reasonable in design, simple structure, compact, low cost of manufacture, tool
There is very strong practicality and wide application prospect.
Brief description of the drawings
Fig. 1 is the structural representation of one embodiment of the invention.
Fig. 2 is the control circuit theory diagrams of one embodiment of the invention.
Fig. 3 is open-loop control system figure of the invention.
In figure:1- photoelectric encoders, 2- photoelectric encoder fixed supports, 3- supersonic motor output shafts, 4- ultrasonic waves electricity
Machine, 5- supersonic motor fixed supports, 6- supersonic motor output shafts, 7- flywheel inertia loads, the output of 8- flywheels inertia load
Axle, 9- yielding couplings, 10- torque sensors, 11- torque sensor fixed supports, 12- pedestals, 13- control chip circuits,
14- driving chip circuits, 15,16,17- photoelectric encoders output A, B, Z phase signals, 18,19,20,21- driving chip circuits
The driving frequency Regulate signal of generation, 22- driving chips circuit produce driving half-bridge circuit Regulate signal, 23,24,25,26,
27th, the signal of the driving chip circuit that 28- control chips circuit is produced, 29- supersonic motor drive control circuits.
Specific embodiment
Below in conjunction with the accompanying drawings and embodiment the present invention will be further described.
The present invention provides a kind of symmetrical hysteresis control method of supersonic motor servo-control system based on Stop operators, its
It is characterised by, comprises the following steps:
Step S1:Refer to Fig. 1, there is provided a pedestal 12 and the supersonic motor on pedestal 12 4, the ultrasonic wave electricity
The side output shaft 3 of machine 4 is connected with photoelectric encoder 1, and opposite side output shaft 6 is connected with flywheel inertia load 7, the flywheel
The output shaft 8 of inertia load 7 is connected through yielding coupling 9 with torque sensor 10, the signal output of the photoelectric encoder 1
End, the signal output part of the torque sensor 10 are respectively connected to control system.
Above-mentioned supersonic motor 4, photoelectric encoder 1, torque sensor 10 are respectively through supersonic motor fixed support 5, light
Photoelectric coder fixed support 2, torque sensor fixed support 11 are fixed on the pedestal 12.
As shown in Fig. 2 above-mentioned control system includes supersonic motor drive control circuit 29, the supersonic motor drives
Control circuit 29 includes control chip circuit 13 and driving chip circuit 14, the signal output part of the photoelectric encoder 1 and institute
The respective input for stating control chip circuit 13 is connected, output end and the driving chip electricity of the control chip circuit 13
The respective input on road 14 is connected, to drive the driving chip circuit 14, the driving frequency of the driving chip circuit 14
Regulate signal output end and drive half-bridge circuit Regulate signal output end respectively with the respective input phase of the supersonic motor 4
Connection.The driving chip circuit 14 produces driving frequency Regulate signal and drives half-bridge circuit Regulate signal, to ultrasonic wave electricity
Frequency, phase and the break-make that machine exports A, B two phase PWM are controlled.Ultrasound is controlled by opening and turning off the output of PWM ripples
The startup of ripple motor and out of service;By adjust output PWM ripples frequency and two-phase phase difference come regulation motor most
Good running status.
Step S2:The control system is set up on the basis of stop operator compensating controllers, the stop operators compensation
Controller is arranged in the control chip circuit;The stop operators compensating controller is with minimum its adjustment letter of Identification Errors
Number, so as to obtain more preferable input and output controlled efficiency;The dynamical equation of the control system is:
Wherein Ap=-B/J, BP=J/Kt> 0, CP=-1/J;B is damped coefficient, and J is rotary inertia, KtIt is current factor,
TfV () is frictional resistance torque, TLIt is loading moment, U (t) is the output torque of motor, θrT () is to be surveyed by photoelectric encoder
The position signalling for measuring.
When the loading moment of motor is moderate, the hysteresis of motor torque-speed characteristics has symmetry, shows to reduce this
As the influence for causing is while reduce operand, we are compensated using the symmetrical hysteresis of stop operators and controlled it:Stop operation
The output of symbol is the function of its critical value s and input v (t), and the stop operators output of input v (t) ∈ C [0, T] can be expressed as:
Es[v] (0)=es(v(0))
Es[v] (t)=es(v(t)-v(ti)+Es[v](ti))
For ti< t < ti+1And 0≤i≤N-1,
es=min (s, max (- s, v))
Wherein 0=t0<t1<......<tl=T is the subregion of T [0, T] so that function v (t) ∈ C [0, T], C [0, T] table
Show the space of the continuous function on [0, T], in each subinterval [ti, ti+1] on be dull;
Under different threshold value s, stop operators are output as:
Above formula discretization, output are described by n stop operator, 0=s0<s1<......<sn=S, that is,:
Wherein wsThe weight of density function is represented, i.e.,
Due to Lipschitz continuitys, stop operators EsFor density function, therefore the model pair based on stop operators can be accumulated
It is Lipschitz continuous in given input v (t) ∈ C [0, T], it is monotonic operation symbol, weight that can further obtain this model
Function integrable and for just;
As shown in figure 3, when the system is operating, input signal v (t) first passes through inverse system ψ, its output is entered as control signal
Enter balanced system Φ, we obtain the mapping expected between input v (t) and output u (t) using feedforward compensation:
U (t)=Φ [ψ [v]] (t)
Initial load curve and given threshold value r based on PPI modelsiWith corresponding weight pi, stop operators can be obtained
Two parameters:Threshold value siWith weight wi;
Assuming that the original upload curve of PPI models is expressed as:
Wherein r ∈ [r0, rnp] and r0=0, npIt is the number of operator p, p is the operator of PPI models, riIt is the threshold of PPI models
Value;Function phip:R+→R+It is convex function and increasing function, in order to obtain the parameter of compensator, the original upload based on stop operators
Curve φsIt is defined as:
Wherein φs::R+→R+It is concave function and increasing function, nsIt is the number of operator, s ∈ [0, s0], s0It is set to big positive reality
Number, meets s0>Max (v (t)), it is ensured that the Rigid Monotony of stop Operator Models;
In order to obtain the weight and threshold value of stop Operator Models, the threshold value and initial load curve of stop Operator Models expire
Foot:
si=φr(ri) (3.16)
φs(si)=ri (3.17)
Any point B (r on initial load curve according to PPIk, φr) meeting equation (3.16) and (3.17), it is always
Corresponding points C (s can be found on the initial load curve of stop operatorsk, φs);The threshold value of stop Operator Models can be with following
Mode is related to the threshold value of PPI models:
s1=r1p0
s2=(r2-r1)p1+r2p0
s3=(r3-r1)p1+(r3-r2)p2+r3p0
sn=(rn-r1)p1+(rn-r2)p2+...+rnp0 (3.18)
Stop Operator Models wiCan be calculated as according to (3.17):
Equation group (3.19) includes (n+1) individual known variables, and the quantity of equation is n, in order to solve equation (3.19) and
Obtain weight wn, should first solve weight w0;
Therefore, using annex point as (s on the initial load curve of SPI modelsn+ 1, φs(sn+ 1)), by makingWhereinIt is arithmetic number, ξ=φ can be expressed ass(sn+1);
According to (3.16) and (3.17):
Formula (3.19) and (3.21):
Equation (3.20) can be expressed as:
W is drawn from (3.22) and (3.23)0:
The weight w of stop Operator Models is readily available finally by solution equation (3.19)i。
The foregoing is only presently preferred embodiments of the present invention, all impartial changes done according to scope of the present invention patent with
Modification, should all belong to covering scope of the invention.
Claims (5)
1. a kind of symmetrical hysteresis control method of supersonic motor servo-control system based on Stop operators, it is characterised in that bag
Include following steps:
Step S1:One pedestal and the supersonic motor on pedestal, supersonic motor side output shaft and light are provided
Photoelectric coder is connected, and opposite side output shaft is connected with flywheel inertia load, and the output shaft of the flywheel inertia load is through connection
Axle device is connected with torque sensor, the signal output part of the photoelectric encoder, the signal output part of the torque sensor
It is respectively connected to a control system;
Step S2:The control system is set up on the basis of stop operator compensating controllers, the stop operators compensation control
Device is with minimum its Tuning function of Identification Errors, so as to obtain more preferable input and output controlled efficiency;The control system it is dynamic
State equation is:
Wherein Ap=-B/J, BP=J/Kt> 0, CP=-1/J;B is damped coefficient, and J is rotary inertia, KtIt is current factor, Tf
V () is frictional resistance torque, TLIt is loading moment, U (t) is the output torque of motor, θrT () is to be measured by photoelectric encoder
The position signalling for obtaining.
2. the symmetrical hysteresis controlling party of the supersonic motor servo-control system based on Stop operators according to claim 1
Method, it is characterised in that:In the step S1, the control system includes supersonic motor drive control circuit, the ultrasonic wave
Motor driving controling circuit includes control chip circuit and driving chip circuit, the signal output part of the photoelectric encoder and institute
The respective input for stating control chip circuit is connected, the output end of the control chip circuit and the driving chip circuit
Respective input is connected, and to drive the driving chip circuit, the driving frequency Regulate signal of the driving chip circuit is defeated
Go out end and drive respective input of the half-bridge circuit Regulate signal output end respectively with the supersonic motor to be connected, it is described
Stop operator compensating controllers are arranged in the control chip circuit.
3. the symmetrical hysteresis controlling party of the supersonic motor servo-control system based on Stop operators according to claim 1
Method, it is characterised in that:In the step S1, the shaft coupling is yielding coupling.
4. the symmetrical hysteresis controlling party of the supersonic motor servo-control system based on Stop operators according to claim 1
Method, it is characterised in that:In the step S1, the supersonic motor, photoelectric encoder, torque sensor are respectively through ultrasonic wave electricity
Machine fixed support, photoelectric encoder fixed support, torque sensor fixed support are fixed on the pedestal.
5. the symmetrical hysteresis controlling party of the supersonic motor servo-control system based on Stop operators according to claim 1
Method, it is characterised in that:In the step S2, the hysteresis of motor torque-speed characteristics has symmetry, is made to reduce this phenomenon
Into influence reduce operand simultaneously, compensated using the symmetrical hysteresis of stop operators and controlled it:Stop operation the output of symbol
It is the function of its critical value s and input v (t), the stop operators output of input v (t) ∈ C [0, T] can be expressed as:
Es[v] (0)=es(v(0))
Es[v] (t)=es(v(t)-v(ti)+Es[v](ti))
For ti< t < ti+1And 0≤i≤N-1,
es=min (s, max (- s, v))
Wherein 0=t0<t1<......<tl=T is the subregion of T [0, T] so that function v (t) ∈ C [0, T], C [0, T] expressions [0,
T] on continuous function space, in each subinterval [ti, ti+1] on be dull;
Under different threshold value s, stop operators are output as:
Above formula discretization, output are described by n stop operator, 0=s0<s1<......<sn=S, that is,:
Wherein wsThe weight of density function is represented, i.e.,
Due to Lipschitz continuitys, stop operators EsFor density function, therefore the model based on stop operators can be accumulated for giving
Surely input v (t) ∈ C [0, T] is Lipschitz continuous, and it is monotonic operation symbol, weighting function that can further obtain this model
Integrable and for just;
When the system is operating, input signal v (t) first passes through inverse system ψ, and its output enters balanced system Φ as control signal,
The mapping expected between input v (t) and output u (t) is obtained using feedforward compensation:
U (t)=Φ [ψ [v]] (t)
Initial load curve and given threshold value r based on PPI modelsiWith corresponding weight pi, obtain two ginsengs of stop operators
Number:Threshold value siWith weight wi;
Assuming that the original upload curve of PPI models is expressed as:
Wherein r ∈ [r0, rnp] and r0=0, npIt is the number of operator p, p is the operator of PPI models, riIt is the threshold value of PPI models;
Function phip:R+→R+It is convex function and increasing function, in order to obtain the parameter of compensator, the original upload based on stop operators is bent
Line φsIt is defined as:
Wherein φs::R+→R+It is concave function and increasing function, nsIt is the number of operator, s ∈ [0, s0], s0Big arithmetic number is set to, it is full
Sufficient s0>Max (v (t)), it is ensured that the Rigid Monotony of stop Operator Models;
In order to obtain the weight and threshold value of stop Operator Models, the threshold value and initial load curve of stop Operator Models meet:
si=φr(ri) (3.16)
φs(si)=ri (3.17)
Any point B (r on initial load curve according to PPIk, φr) meeting equation (3.16) and (3.17), it can be always
Corresponding points C (s are found on the initial load curve of stop operatorsk, φs);The threshold value of stop Operator Models can be with the following methods
Threshold value to PPI models is related:
s1=r1p0
s2=(r2-r1)p1+r2p0
s3=(r3-r1)p1+(r3-r2)p2+r3p0
sn=(rn-r1)p1+(rn-r2)p2+...+rnp0 (3.18)
Stop Operator Models wiCan be calculated as according to (3.17):
Equation group (3.19) includes (n+1) individual known variables, and the quantity of equation is n, in order to solve equation (3.19) and obtain
Weight wn, should first solve weight w0;
Using annex point as (s on the initial load curve of SPI modelsn+ 1, φs(sn+ 1)), by makingWhereinIt is arithmetic number, ξ=φ can be expressed ass(sn+1);
According to (3.16) and (3.17):
Formula (3.19) and (3.21):
Equation (3.20) can be expressed as:
W is drawn from (3.22) and (3.23)0:
The weight w of stop Operator Models is readily available finally by solution equation (3.19)i。
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EP0580447A1 (en) * | 1992-07-24 | 1994-01-26 | Seiko Instruments Inc. | Ultrasonic motor and electronic apparatus equipped with ultrasonic motor |
CN105099263A (en) * | 2015-09-28 | 2015-11-25 | 闽江学院 | Ultrasonic motor position and speed control system for generalized regression neural network-based identifier |
CN105223806A (en) * | 2015-10-20 | 2016-01-06 | 闽江学院 | Based on the supersonic motor fuzzy Neural Network Control Method of basis function network |
CN106329986A (en) * | 2016-08-09 | 2017-01-11 | 闽江学院 | Adaptive backstepping servo control method of ultrasonic motor |
CN106406093A (en) * | 2016-10-12 | 2017-02-15 | 闽江学院 | Ultrasonic motor servo control system asymmetric hysteretic compensation control device and method |
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2017
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Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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EP0580447A1 (en) * | 1992-07-24 | 1994-01-26 | Seiko Instruments Inc. | Ultrasonic motor and electronic apparatus equipped with ultrasonic motor |
CN105099263A (en) * | 2015-09-28 | 2015-11-25 | 闽江学院 | Ultrasonic motor position and speed control system for generalized regression neural network-based identifier |
CN105223806A (en) * | 2015-10-20 | 2016-01-06 | 闽江学院 | Based on the supersonic motor fuzzy Neural Network Control Method of basis function network |
CN106329986A (en) * | 2016-08-09 | 2017-01-11 | 闽江学院 | Adaptive backstepping servo control method of ultrasonic motor |
CN106406093A (en) * | 2016-10-12 | 2017-02-15 | 闽江学院 | Ultrasonic motor servo control system asymmetric hysteretic compensation control device and method |
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