The invention discloses a methanol combustor controller and a control method thereof. According to actually measured pressure, proportion relations among a fuel, air and an oxidant are obtained through querying a fuel, air and oxidant proportion relation pulse spectrum map, according to a difference between the actually measured pressure and boiler set target pressure, through querying a PID parameter pulse spectrum map, parameters of a PID are adjusted automatically, when the difference between the boiler set target pressure and the actually measured pressure is quite large, the PID automatically increases steplength adjustment, and when the boiler set target pressure is close to the actually measured pressure, the PID automatically decreases the steplength adjustment; a single-chip microcomputer module, based on the proportion relations among the fuel, the air and the oxidant and the PID parameters, adjusts the flow of the fuel, the air and the oxidant. According to the invention, the flow of the fuel, the air and the oxidant can be reasonably controlled, the boiler combustion efficiency is improved, and emission of harmful gas is reduced.

Methanol combustor controller and control method thereof

The invention discloses a system and a method for controlling network cascade temperature based on a trigger mechanism. The system is characterized by comprising a master controller, wherein the master controller is connected with a cascade control loop through a network; the master controller is also connected with a self-correcting controller; the cascade control loop comprises an outer circle PID (Proportion Integration Differentiation) control loop and an inner circle PID control loop; an event trigger is arranged in the outer circle PID control loop; the self-correcting controller comprises a parameter adjuster and a parameter estimator; the event trigger works through the trigger mechanism; the event trigger is used for comparing an output signal of a main transmitter with a signal sent to the master controller; if a comparison value is more than a given trigger mechanism value, the signal sent to the master controller is updated; if the comparison value is less than or equal to the given trigger mechanism value, the output signal is not updated by the master controller. The system provided by the invention has the advantages of both a cascade control structure and a network control structure and also has better adaptive capacity and robust performance.

System and method for controlling network cascade temperature based on trigger mechanism

The invention belongs to the field of automatic control, and particularly discloses a small amplitude rapid temperature control device and method. The small amplitude rapid temperature control methodcomprises the steps that a real time temperature of a controlled object is obtained, and an initial temperature of the controlled object is recorded; the purpose that the initial temperature is smaller than a set temperature related to a target temperature is responded, and the controlled object is heated; a smallest temperature in the process of heating is recorded; and the purpose that a real time temperature is larger than a sum of the smallest temperature and a float value is responded, and heating of the controlled object is stopped. According to the small amplitude rapid temperature control device and method, the temperature of the controlled object is enabled to be close to the target temperature rapidly, and a temperature overshoot value in the process of controlling can be effectively reduced.

Small amplitude rapid temperature control device and method

The invention discloses an intelligent control method for a main steam pressure of a supercritical (ultra-supercritical) unit boiler. The method comprises adjustment of variables required by a boiler master controller and adjustment of a main steam pressure set value, wherein during the adjustment of the variables required by the boiler master controller, the main steam pressure set value and a feed-forward quantity are controlled and adjusted according to an actual main steam pressure variation rate; and during the adjustment of the main steam pressure set value, a pressure adjustment sliding pressure curve of the main steam pressure is acquired at first, a positive constraint value and a negative constraint value are determined for the adjustment sliding pressure curve of the main steam pressure so as to form a pressure set value constraint face used for the adjustment, control rules of the pressure set value inside and outside the constraint face are then established, and whether the boiler master controller adjusts the main steam pressure is determined according to the control rules. In a conventional main steam pressure control system, the method disclosed by the invention has the advantages that random errors existing in actual adjustment courses are overcome; the main steam pressure under rapid AGC load variation is adjusted stably; a load response rate of a supercritical unit is increased effectively; and safety and economic efficiency of unit running are improved.

Generalized intelligent control method for main steam pressure of supercritical (ultra-supercritical) unit

The invention relates to a dynamic matrix control method for a controlled object with integrals and a delay link. The method comprises the steps that (1) a controlled object with integrals and the delay link is provided; (2) a feedback path is set for the controlled object with integrals and the delay link, and the controlled object with self-balancing capacity is constructed; (3) a simplified model of the controlled object with the self-balancing capacity is constructed; (4) a dynamic matrix controller is designed for the simplified model of the controlled object with the self-balancing capacity, and a virtual real-time prediction control signal is obtained; (5) an actual real-time prediction control signal of the controlled object with integrals and the delay link is obtained according to the virtual real-time prediction control signal, and the dynamic matrix control is achieved. Compared with the prior art, the method can overcome defects existing in a dynamic matrix control algorithm and improve deficiencies of the control quality of the traditional control method, and the implement method of the dynamic matrix control on the controlled object with integrals and the delay linkis provided.

Dynamic matrix control method for controlled object with integrals and delay link

The invention provides a model driven PID control method and a model driven PID control device The control method comprises the following steps: obtaining the status value of a controlled object; scaling the deviation between the status value and an ideal value of the controlled object according to a predetermined proportionality coefficient to generate a scaling signal; generating an input signal according to the scaling signal and a feedback signal serving as positive feedback; generating a control signal according to the input signal and a compensation signal serving as negative feedback; and controlling the controlled object according to the control signal The model driven PID control device comprises an obtaining unit, a scaling unit, a feedback unit, a compensation unit and a control unit According to the model driven PID control method and the model driven PID control device, time required by adjustment of the controlled object can be shortened, shake of the controlled object during an adjustment process can be eliminated, and the controlled object is stable

Cheng Feng

Papers

Model driven PID control method and model driven PID control device