阅读说明：本技术 具有抗干扰能力的静刹车保护电路及其设计方法 (Quiet brake protection circuit and its design method with anti-interference ability ) 是由 刘忠平 韩亚国 董智超 于 2019-09-09 设计创作，主要内容包括：一种具有抗干扰能力的静刹车保护电路及其设计方法,采用运算放大器制作一个比较电路；该比较电路中包括运算放大器、6个电阻和3个二极管；其中：运算放大器的第1脚、第3脚、第三二极管与第五电阻组成静刹车保护滞回比较特性电路。运算放大器的第1脚、第3脚、第二二极管与第六电阻组成起效滞回比较特性电路,通过提高静刹车保护电路滞回特性对应静刹车起效和静刹车保护两个电压之间的差值,从而提高了静刹车保护电路抵抗瞬间速度变化的能力,提高了刹车系统在输出静刹车压力的情况下,抗外界振动,以及综合电磁环境干扰的能力,消除了由于外界干扰而造成的静刹车起效与静刹车失效状态的自动切换,提高了静刹车系统的稳定性。(A kind of quiet brake protection circuit and its design method with anti-interference ability, makes a comparison circuit using operational amplifier；It include operational amplifier, 6 resistance and 3 diodes in the comparison circuit；Wherein: the 1st foot, the 3rd foot, third diode and the 5th resistance of operational amplifier form quiet brake and protect hysteresis comparative characteristic circuit.1st foot of operational amplifier, 3rd foot, second diode and the 6th resistance form action hysteresis comparative characteristic circuit, the difference that quiet brake works between two voltages of quiet brake protection is corresponded to by improving quiet brake protection circuit hysteretic characteristic, to improve the ability that quiet brake protection circuit resists instantaneous speed variation, brake system is improved in the case where exporting quiet brake pressure, anti- extraneous vibration, and the ability of comprehensive electromagnetic environmental disturbances, eliminate as external interference and caused by the automatic switchover that works with quiet brake failure state of quiet brake, improve the stability of quiet brake system.)

1. circuit is protected in a kind of quiet brake with anti-interference ability, which is characterized in that make a ratio using operational amplifier Compared with circuit；It include operational amplifier, 6 resistance and 3 diodes in the comparison circuit；6 resistance are successively labeled as the first electricity To the 6th resistance, 3 diodes are successively labeled as first diode to third diode for resistance；Wherein:

8th foot of the operational amplifier is power input and+18V.DC power supply connection；4th foot of the operational amplifier With ground wire connection；1st foot of the operational amplifier simultaneously with one end of the 5th resistance and one end connection of the 6th resistance；It is described The cathode connection of the other end of 5th resistance and third diode, the of the anode of the third diode and the operational amplifier 3 foot connection；The other end of 6th resistance and the positive connection of the second diode, the cathode of second diode and the fortune Calculate the 3rd foot connection of amplifier；3rd foot of the operational amplifier simultaneously with one end of second resistance and one end of 3rd resistor Connection；One end connection of the other end of the second resistance and the 4th resistance, the other end and+18V.DC power supply of the 4th resistance Connection；The other end and ground wire connection of the 3rd resistor；2nd foot of the operational amplifier and bearing for the first diode Pole connection, while one end connection with first resistor, the other end and ground wire connection of the first resistor；The first diode The output end connection of anode and the reference speed module in aircraft brake control box.

2. circuit is protected in the quiet brake with anti-interference ability as described in claim 1, which is characterized in that the of operational amplifier 1 foot, the 3rd foot, third diode and the 5th resistance form quiet brake and protect hysteresis comparative characteristic circuit；The 1st of operational amplifier Foot, the 3rd foot, the second diode and the 6th resistance form action hysteresis comparative characteristic circuit.

3. as described in claim 1 with anti-interference ability quiet brake protect circuit, which is characterized in that when aircraft speed by When high past low variation, quiet brake protection circuit changes from quiet brake guard mode to quiet brake action state；It is protected in quiet brake When state, the 3rd foot voltage of operational amplifier is 10.15V, and the 1st foot output voltage of operational amplifier is 0.5V；When operation is put When 2nd foot voltage of big device drops to 4.42V or less, the 1st foot output voltage of operational amplifier is 16.5V, and quiet brake works； Meanwhile the 3rd foot voltage of operational amplifier is 4.42V, corresponding air speed value is 34.8Km/h.

4. as described in claim 1 with anti-interference ability quiet brake protect circuit, which is characterized in that when aircraft speed by When low past High variation, quiet brake protection circuit changes from quiet brake action state to quiet brake guard mode, when quiet brake works, operation 1st foot output voltage of amplifier is 16.5V, and the 3rd foot voltage of operational amplifier is 4.42V；When the 2nd foot of operational amplifier When voltage increases to 10.15V or more, when the 1st foot output voltage of operational amplifier changes to 0.5V, the 3rd of operational amplifier the Foot voltage is 10.15V, and corresponding air speed is 190.8Km/h.

5. a kind of design method of the quiet brake protection circuit with anti-interference ability as described in claim 1, which is characterized in that Detailed process is:

Step 1: the parameter of each electronic component in quiet brake protection hysteresis comparative characteristic circuit is determined:

The parameter of each electronic component in quiet brake protection hysteresis comparative characteristic circuit is determined according to quiet brake protection voltage；

Quiet brake, which is set, according to air speed protects voltage；Quiet brake protection voltage is that voltage corresponding to speed is protected in quiet brake Value；

Each electronic component includes each 5th resistance, operational amplifier and third diode；Each electronic component Parameter include the resistance value of each resistance, the model of operational amplifier and diode；

It sets the quiet brake of aircraft and protects speed, the corresponding voltage value of the speed is the voltage of the 3rd foot of operational amplifier；

Step 2: the parameter of each electronic component in action hysteresis comparative characteristic circuit is determined:

The parameter of each electronic component in action hysteresis comparative characteristic circuit is determined according to quiet brake action voltage:

Each electronic component includes each 6th resistance and the second diode；The parameter of each electronic component includes the 6th The model of the resistance value of resistance and the second diode；

The quiet brake action speed of the aircraft is set, the corresponding voltage value of the speed is the quiet brake action voltage of aircraft；The aircraft Quiet brake action voltage is the voltage of the 3rd foot of operational amplifier；

So far, the design of the quiet brake protection circuit with anti-interference ability is completed.

6. the design method of the quiet brake protection circuit with anti-interference ability as claimed in claim 5, which is characterized in that described Operational amplifier selects F158 operational amplifier, and each diode is BZ03C；First electricity is determined by Ohm's law The resistance value of resistance is 10K Ω, and the resistance value of second resistance is 0.681K Ω, and the resistance value of 3rd resistor is 4.64K Ω, the 4th electricity The resistance value of resistance is 12K Ω, and the resistance value of the 5th resistance is 43K Ω, and the resistance value of the 6th resistance is 5.1K Ω.

Technical field

The present invention relates to Aircraft Anti-skid Break Control field, electricity is protected in specifically a kind of quiet brake with anti-interference ability Road and its design method.

Background technique

" when brake gear temperature is room temperature, brake lever is effective for the quiet brake regulation of the 4.3.2.2.1 of HB6761-93 In stroke range, there should be enough quiet brake torque chomp on the binders, so that aircraft is stopped under manufacturer's maximum total weight and be parked in 33 ° of slopes On ".Quiet brake defencive function is one of the primary control logic of existing airplane antiskid braking control box.

Summary of the invention

It is existing in the prior art since the pressure difference of quiet brake protection voltage and quiet brake action voltage is small to overcome, so that The unstable deficiency of quiet braking state, the present invention propose that circuit and its design side are protected in a kind of quiet brake with anti-interference ability Method.

Quiet brake protection circuit proposed by the present invention with anti-interference ability makes a comparison using operational amplifier Circuit；It include operational amplifier, 6 resistance and 3 diodes in the comparison circuit；6 resistance are successively compiled as first resistor extremely 6th resistance, 3 diodes are successively compiled as first diode to third diode；Wherein: the 8th foot of the operational amplifier is Power input and+18V.DC power supply connection；The 4th foot and ground wire connection of the operational amplifier.The operational amplifier 1st foot simultaneously with one end of the 5th resistance and one end connection of the 6th resistance；The other end of 5th resistance and the three or two pole The cathode connection of pipe, the 3rd foot connection of the anode and the operational amplifier of the third diode；6th resistance it is another The positive connection at end and the second diode, the 3rd foot connection of the cathode of second diode and the operational amplifier；The fortune Calculate amplifier the 3rd foot simultaneously with one end of second resistance and one end connection of 3rd resistor；The other end of the second resistance With one end connection of the 4th resistance, the other end and+18V.DC power supply connection of the 4th resistance；The other end of the 3rd resistor With ground wire connection.2nd foot of the operational amplifier and the cathode connection of the first diode, while one with first resistor Hold connection, the other end and ground wire connection of the first resistor.Base in the first diode anode and aircraft brake control box The output end connection of Quasi velosity module.

The 1st foot, the 3rd foot, the third diode of operational amplifier are special compared with the 5th resistance forms quiet brake protection hysteresis Property circuit.The 1st foot, the 3rd foot, the second diode and the 6th resistance of operational amplifier form action hysteresis comparative characteristic circuit.

When the speed of aircraft changes from high to lower, quiet brake protection circuit works from quiet brake guard mode to quiet brake State transformation.In quiet brake guard mode, the 3rd foot voltage of operational amplifier is 10.15V, and the 1st foot of operational amplifier is defeated Voltage is 0.5V out；When the 2nd foot voltage of operational amplifier drops to 4.42V or less, the 1st foot of operational amplifier exports electricity Pressure is 16.5V, and quiet brake works；Meanwhile the 3rd foot voltage of operational amplifier is 4.42V, corresponding air speed value is 34.8Km/h。

When the speed of aircraft from it is low toward High variation when, quiet brake protection circuit is protected from quiet brake action state to quiet brake State transformation, when quiet brake works, the 1st foot output voltage of operational amplifier is 16.5V, the 3rd foot electricity of operational amplifier Pressure is 4.42V；When the 2nd foot voltage of operational amplifier increases to 10.15V or more, the 1st foot output voltage of operational amplifier When changing to 0.5V, the 3rd foot voltage of operational amplifier is 10.15V, and corresponding air speed is 190.8Km/h.

The design process of the quiet brake protection circuit with anti-interference ability proposed by the present invention is:

Step 1: the parameter of each electronic component in quiet brake protection hysteresis comparative characteristic circuit is determined:

The parameter of each electronic component in quiet brake protection hysteresis comparative characteristic circuit is determined according to quiet brake protection voltage.

Quiet brake, which is set, according to air speed protects voltage.Quiet brake protection voltage is that quiet brake is protected corresponding to speed Voltage value.

Each electronic component includes each 5th resistance, operational amplifier and third diode；Each electronics member The parameter of device includes the resistance value of each resistance, the model of operational amplifier and diode.

It sets the quiet brake of aircraft and protects speed, the corresponding voltage value of the speed is the voltage of the 3rd foot of operational amplifier.

Step 2: the parameter of each electronic component in action hysteresis comparative characteristic circuit is determined:

The parameter of each electronic component in action hysteresis comparative characteristic circuit is determined according to quiet brake action voltage:

Each electronic component includes each 6th resistance and the second diode；The parameter packet of each electronic component Include the resistance value of the 6th resistance and the model of the second diode.Set the quiet brake action speed of the aircraft, the corresponding electricity of the speed Pressure value is the voltage of the 3rd foot of operational amplifier.

The quiet brake action speed of the aircraft is set, the corresponding voltage value of the speed is the quiet brake action voltage of aircraft；It should The quiet brake action voltage of aircraft is the voltage of the 3rd foot of operational amplifier.

The operational amplifier selects F158 operational amplifier, and each diode is BZ03C.It is true by Ohm's law The resistance value of the fixed first resistor is 10K Ω, and the resistance value of second resistance is 0.681K Ω, and the resistance value of 3rd resistor is 4.64K Ω, the resistance value of the 4th resistance are 12K Ω, and the resistance value of the 5th resistance is 43K Ω, and the resistance value of the 6th resistance is 5.1KΩ。

So far, the design of the quiet brake protection circuit with anti-interference ability is completed.

The present invention improves voltage value when quiet brake protection, improves to work in quiet brake and protects two states with quiet brake Voltage difference, to achieve the purpose that improving quiet brake protects circuit anti-interference ability.

When aircraft maximum speed is 330Km/h, corresponding wheel speed signal f is 2750Hz, V_{p_p}The frequency of >=0.6V Signal, corresponding wheel velocity voltage V_ωkFor 12.5V, corresponding reference speed voltage V_ωRFor 12.4V, anti-skidding failure speed is 30⁺⁸Km/h, corresponding wheel velocity voltage V_ωkFor 4V, corresponding reference speed voltage V_ωRFor 3.9V；

When quiet brake works, the 1st foot output voltage of operational amplifier U1 is 16.5V, and operational amplifier U1 passes through the Two diode D2 and the 6th resistance R6 form hysteresis comparative characteristic circuit.Quiet brake action voltage is 4.42V, corresponding air speed Value is 34.8Km/h.

In quiet brake protection, the 1 foot output voltage of operational amplifier U1 is 0.5V, and operational amplifier U1 passes through the three or two Pole pipe D3 and the 5th resistance R5 forms hysteresis comparative characteristic circuit.Quiet brake protection voltage is 10.15V, corresponding air speed value For 190.8Km/h.

It is 190.8-34.8=156Km/h that quiet brake protection circuit hysteretic characteristic, which corresponds to air speed difference,；Corresponding benchmark speed Degree voltage difference is 10.15-4.42=5.73V.

By improving, quiet brake protection circuit hysteretic characteristic corresponds to quiet brake action to the present invention and two electricity are protected in quiet brake The difference of quiet brake action voltage and quiet brake protection voltage has been increased to 5.73V by 1.3V by the difference between pressure, corresponding Air speed difference is increased to 156Km/h by 30.65Km/h, so that improving quiet brake protection circuit resists instantaneous speed variation Ability, improve brake system in the case where exporting quiet brake pressure, anti-extraneous vibration and comprehensive electromagnetic environmental disturbances Ability, eliminate as external interference and caused by the automatic switchover that works with quiet brake failure state of quiet brake, improve The stability of quiet brake system.

Detailed description of the invention

Fig. 1 is the quiet brake protection electrical block diagram of the prior art

Fig. 2 is the quiet brake protection electrical block diagram of the present invention

Specific embodiment