The PID that is based on PLC from adaptive control implement the application in timing system

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1 foreword system is to be aimed at X of boring machine of W160 of plant of the engine that make oxygen be born, Y, Z3 feed is highest rotate speed is 3 000r/min, the dc electromotor of Min of ／ of 30r of ≤ of lowermost rotate speed, implementation static state does not have 1 000 of ≥ of D of scope of static difference S=0, timing; Dynamic electric current exceeds 5 ％ of ≤ of ％ of ／ of ι of the σ that move an amount, speed to exceed ≤ of ％ of N of the σ that move an amount system of 10 ％ stepless speed regulation. In shedding system of timing of reversible double closed circuit continuously, need controller of two class PID to undertake modulatory, but the timing that should realize such high accuracy, pure the PID controller that uses convention, the requirement of very inaccessible system. As the development of nerve network theory, application the most extensive PID controller and the nerve network look that have function of self-study be used to are united in wedlock, already became intelligent pilot a new way, obtained positive result of a few research on one hand in this [2, 3] . Among them by odd nerve yuan the PID that form from adaptive control implement, it is PID control law be in harmony takes nerve network in, the essence that implements nerve network and PID control rule is united in wedlock, finish PID Bai Kuo to should adjust jointly. If its network structure pursues 1, 1 is shown, it is a kind of trends that by scale, integral, differential 2 unit comprise forward network, each nerve yuan worth of power of means of a number, join, join is the basic principle that controls the rule by PID and already some experience are certain, can assure systematic stability and fast astringent. Nerve network PID comes true with PLC in article from adaptive control, apply at dc logic to control a system without circumfluent and reversible timing, make control precision of the system achieved what only theoretic ability comes true not to have static difference. The composition of system of 2 PLC control is moved according to system of timing of dc of boring machine of W160 be born, the requirement of static function index, amount of the control equipment that considers this equipment, parts of an apparatus is much, right the taller requirement that systematic moving on the safe side raises, the PLC that uses high reliability regards control as core, the dc timing that is actuator with brilliant brake canal controls a system, one dynamo sheds the AC motor that replaces primary facility all the time the timing system with huge electromotor. If the timing system that PLC implements pursues 2, 1 is shown. The system basically is formed by two parts, if systematic block diagram pursues 2, 2 are shown. Among them PID of network of PLC implementation nerve from adaptive control implement the control part that does not have circumfluent double closed circuit with logic, dah line is inside dotted line casing bit by bit (V- - brake of brilliant of M) three-phase bridge-type provides one electromotor system, GT is V- - the brilliant brake canal of M system hits hair circuit, it comes true by hardware. Short underline dotted line inverting soft switch is inside casing, come true by PLC software. This system is system of timing of double closed circuit of speed, electric current, that is to say the operation of two class PID that PLC has speed adjuster and voltaic adjuster establish ties respectively to signal of input of these 3 imitate, touch hair circuit to give out to what brilliant brake is in charge of move phase voltage signal. So, the fast sex that the system follows and control precision key depend on design and adjust of PID adjuster precision. Use odd nerve yuan compositive PID from adaptive control implement, have the advantage of traditional PID controller already, the collateral structure that has nerve network again and study remember a function, and the structure is simple, come true easily, so it more agree with control system. 3 　 PID from adaptive control implement algorithm of groovy PID control is: Type (3-2) in T is sampling cycle, kp is coefficient of proportionality, k1=Kp=TI is integral coefficient of proportionality, KD ＝ KPTD is differential coefficient of proportionality. The type on the basis, comprise the controller that constructs by network of two linear nerve, if pursue 1, 1 is shown. Can get nerve network PID to control coefficient to amend form with gradient method: Among them R is systematic set-point, y exports a worth for the system, lr grows to study a situation: 1 　 of ＜ of 0 ＜ Lr is long to the initial value of Wi and study pace, it is mattered to not only whether to reach overall situation most bit, and the accident that also affects study time [4] . It is important to answer systematic blame the high accuracy that is aimed at to this article place, quickly to be. 4 be based on PLC in shedding system of timing of double closed circuit continuously from 　 of 　 of adaptive control method, to raise the necessity of the fast sex that the system answers and current limliting, voltaic core still uses traditional PI regulator, and rotate speed annulus uses nerve network PID from adaptive control implement, in order to raise rash club sex of the system. The PID operation that appearance of this two stage establishs ties comes true by PLC, serve as link of this one operation interrupt a program to handle. If pursue,the PID of PLC interrupts processing subprogram technological process from adaptive control 4, 1 is shown. The function that wants implementation according to systematic place and PLC order carry out the characteristic of the program, write the program of PLC. Choose S7 of Xi Menzi company, the PLC of 200 series undertakes the system is configured. Do not have the requirement that system of timing of circumfluent and reversible dc moves actually according to logic, PLC basically realized PID of two class series connection to suit oneself adjust reach logistic inverting. In the meantime, still realized a system to protect function and system to display a function. The nerve network PID that 　 of 5 last word 　 realize with PLC from adaptive control implement apply at timing system, control precision is tall, and economy capability of reliable, interference rejection is strong, inside the range that permits resistor of laden, armature and change of moment of inertia, can maintain response fast sex and without static difference, without the good performance that exceeds tone. It is special apply to a machine tool to control a system, can achieve timing share already, also can use the applied characteristic of PLC sequence control at the same time, the relay that replaces the rest controls a share, can make construction of system compact so, facilitate safeguard. CNC Milling CNC Machining