Numeral filter wave be at numeral signal importation before, use numeral calculation of method to realization logarithms word signal of processing, will a set of importation of numeral sequence conversion is a set of output's numeral sequence, make information in the scope of the signal frequency pass, but the information of other frequency scope drive arrestment.Attain to strengthen signal thus, depress interference, separate signal and interference, withdraw the purpose of useful information.Numeral filter the process of wave, actually be an adoption numeral system realization a kind of process for operate, with general of imitate the filter compare, it have credibility Gao, accuracy Gao, vivid sex Gao of advantage.The numeral filter a method to have a lot and filter an effect each difference also, some method be effective, but calculate way complications, very difficult application in solid system.This text introduction is a few in common use of the numeral filter a method, and to they are in solidly the hour the system of application carry on analysis and comparison.
In simulator input gathering process, because receives the external environment, the system noise frequently and so on disturbing effect, causes the data acquisition the precision to reduce, cannot reflect truthfully is measured the object the real situation. Must enhance the gathering data the precision, causes the disturbance the influence to fall to lowly, on the one hand improves from the hardware aspect, if chooses the excellent in quality sensor, for the gathering system forward channel design filter circuit, carries on the frequency filtering. On the other hand, through the CPU control, selects certain algorithm, may also realize the frequency filtering through the procedure method, completes the analog filter similar function, this is the software filter, is also called the digital filtering. the digital filtering is before the digital signal input, realizes with digital computation's method to digital signal processing, inputs the digital sequence transformation a group is the digital sequence which a group outputs, enables in the signaling frequency scope the information to pass, but other frequency range's information is prevented. Thus achieves the enhancement signal, pulls down the disturbance, separates the signal and the disturbance, withdraws the useful information the goal. Digital filtering's process, in fact is uses the number system to realize one kind of operation process, compares with the general analog filter, it has the reliability to be high, the precision is high, flexible high merit. The digital filtering method has many, the filter effect also varies, some method effect is very good, but the algorithm is complex, very difficult to apply in the real time system. This article introduced that several commonly used digital filtering method, and carries on the analysis and the comparison to them in real time system's application
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In simulator input gathering process, because receives the external environment, the system noise frequently and so on disturbing effect, causes the data acquisition the precision to reduce, cannot reflect truthfully is measured the object the real situation. Must enhance the gathering data the precision, causes the disturbance the influence to fall to lowly, on the one hand improves from the hardware aspect, if chooses the excellent in quality sensor, for the gathering system forward channel design filter circuit, carries on the frequency filtering. On the other hand, through the CPU control, selects certain algorithm, may also realize the frequency filtering through the procedure method, completes the analog filter similar function, this is the software filter, is also called the digital filtering. the digital filtering is before the digital signal input, realizes with digital computation's method to digital signal processing, inputs the digital sequence transformation a group is the digital sequence which a group outputs, enables in the signaling frequency scope the information to pass, but other frequency range's information is prevented. Thus achieves the enhancement signal, pulls down the disturbance, separates the signal and the disturbance, withdraws the useful information the goal. Digital filtering's process, in fact is uses the number system to realize one kind of operation process, compares with the general analog filter, it has the reliability to be high, the precision is high, flexible high merit. The digital filtering method has many, the filter effect also varies, some method effect is very good, but the algorithm is complex, very difficult to apply in the real time system. This article introduced that several commonly used digital filtering method, and carries on the analysis and the comparison to them in real time system's application
Analog input signal in the acquisition process, because often the external environment, the system noise and other interference effects, resulting in reduced accuracy of the data collection, can not be measured accurately reflect the real situation of objects. To improve the accuracy of data collected so that the impact of interference to a minimum, on the one hand from hardware to be improved, such as the choice of good quality sensors, to the collection system prior to the channel filter circuit design, frequency filtering. On the other hand, controlled by the CPU, select certain algorithms, through procedural methods can also achieve frequency filtering, analog filters to complete a similar function, and this is filtering software, also called digital filtering.
Digital filtering is in the digital signal input, using figures calculated approach to the realization of digital signal processing, will enter a sequence of numbers into a group of output figures sequence, so that the signal frequency range of information was passed and the other Frequency range of information was blocked. To achieve enhanced signal, to suppress interference, and interference from the signal, extract useful information for the purpose. Digital filtering process is, in fact, a digital system to achieve a computing process, and general analog filters compared it with high reliability, high precision and high flexibility of the merits. There are many digital filter, filter effects vary, some method is very good, but complex algorithms, it is difficult to apply real-time system. This article introduces several commonly used digital filtering methods and their application in real-time system for analysis and comparison.
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Principle of work:
The FSDB series hydraulic pressure plate brake becomes by the driving pliers part and the driven pliers part two parts of joints (sees structure schematic drawing). When the hydraulic pressure power supply starts and inputs the pressure oil, its piston under the hydraulic pressure function retracts, causes on the driving pliers' friction liner with to apply the brake the body (brake disc) to realize unilateral is separated from. While which is separated from, the driven pliers under recoil check spring's function leave are applied the brake the sleeve to become the brake to open (loose floodgate). When the hydraulic pressure power supply stops or controls the solenoid valve opens, in driving pliers' pressure oil pressure vanishing, the piston under the precompression brake block spring's function rapidly promotes, affects on the friction liner and presses to is applied the brake the body, simultaneously the driven pliers in the driving pliers and under connecting bolt's function, lead through the glide guide pillar's function rub the liner to press to are applied the brake the sleeve to become the brake (band brake).
The ZSDB series hydraulic pressure plate brake becomes by the driving pliers part and the driven pliers part two parts of joints (sees structure schematic drawing). When the hydraulic pressure power supply starts and inputs the pressure oil, in the driving pliers' piston under the hydraulic pressure function promotes, affects on the friction liner and presses to is applied the brake the body, simultaneously the driven pliers under the driving pliers' function, lead through the glide guide pillar's function rub the liner to press to are applied the brake the sleeve to become the brake (band brake). When the hydraulic pressure power supply stops or controls the solenoid valve opens, on piston's pressure vanishing, the brake opens.
Tanghui town east side
320 national highway
Jiaxing city
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