38 results about "Linear control systems" patented technology

A linear motion control device for use in a linear control system is presented. The linear motion control device includes a coil driver to drive a coil that, when driven, effects a linear movement by a motion device having a magnet. The linear motion control device also includes a magnetic field sensor to detect a magnetic field associated with the linear movement and an interface to connect an output of the magnetic field sensor and an input of the coil driver to an external controller. The interface includes a feedback loop to relate the magnetic field sensor output signal to the coil driver input.

The invention discloses a design method for a nonlinear system controller of an aero-engine. The method is directed at control problems of the affine nonlinear system of the aero-engine within a large deviation range. The method comprises the following steps: linearizing the nonlinear system of the aero-engine based on the theory of exact linearization, adopting the variable structure control in designing a non-linear sliding mode controller, changing a control structure with a purpose by using a linearized state variable to enable the linearized state variable to move based on the designed sliding mode track so as to offset parameter perturbation and exterior interference, finally directed at the key problem of designing non-linear controller parameters, adopting the artificial bee colony algorithm in adjusting the controller parameters, and calculating the optimal parameter to optimize the control effect. According to the invention, the method is directed at the problem of designing complex controller parameters, and obviates the need for tedious manual debugging and repeated verification. By using the bee colony algorithm in designing a reasonable target performance function, the method enables an automatic calculation of the optimal controller parameters and enables the non-linear controlling system of the aero-engine to have a satisfied dynamic performance and robust stability.

The invention relates to a microgrid energy optimization scheduling method based on adaptive control. The microgrid energy optimization scheduling method comprises the steps of S1, obtaining a randomlinear control system; S2, constructing an adaptive microgrid optimization scheduling model according to the random linear control system obtained in the step S1; S3, performing MPC optimal schedulingon the adaptive microgrid optimal scheduling model constructed in the step S2. The beneficial effects of the method are that: according to the microgrid energy optimization scheduling method based onadaptive control, under a combined optimization scheduling framework of a random energy and an energy storage system, an optimization strategy based on adaptive random model predictive control is provided; the method is compared with a robust model predictive control method based on scene construction, different self-adaptive updating strategies and comparison models of different adjusting parameters are designed, the scheduling performance of the system and the self-adaptability of the model can be effectively improved, and the conservative property of the system is reduced.

The invention relates to a tangent linearization method of an aircraft nonlinear control tracking control system. Regarding nonlinear tracking controllers of a flight control system, the tangent linearization method of the aircraft nonlinear tracking control system is characterized by including the steps that state extension is conducted on the aircraft nonlinear control system, a state differential equation of a tangent linearization system is calculated; time varying linear system feedback stabilization gains are designed; the differential equation is solved to obtain four steps of a nonlinear flight control system tracking control law. Compared with the prior art, the method for designing the aircraft control system tracking controller based on tangent linearization is provided, complete equivalent linearization modeling can be conducted on the complex flight control system, and the tracking controller design can be conducted on the control system, an effective analysis tool is provided for implementing the control system in real time, the powerful theoretical basis and the technical support are further provided for meeting high requirements in the flight control system design aspects, and the method has good engineering application value.

The invention relates to a method for tuning PID parameters of a linearity system with differentiation. The method includes identifying the controlled process of currently known type linearity system with differentiation to obtain model parameters, selecting PID controller types based on control requirement according to the type of the controlled process, searching corresponding a PID parameter tuning formula from linearity system with differentiation PID controller parameter tuning table based on multi-capacity inertia standard transfer function according to the type of the controlled process and the type of the PID controller, and applying the calculated PID parameters to control a controlled process. No discussion on tuning PID parameters of a linearity system with differentiation is available in the prior art. The PID parameter tuning method is based on complete theoretical analysis and derivation, less known parameters are needed, and the calculation is simple. The method is applicable to linear control system with requirements on rapid reaction and large overshooting. The method is highly stable and robust and overcomes the defect of wearing of a performer due to improper tuning of PID parameters.

The invention relates to a self-adaptive nonlinear control system for an internal thermally coupled distillation column. The system comprises a field intelligent instrument and a distributed control system (DCS) which are directly connected with the internal thermally coupled distillation column, wherein the DCS comprises a storage device, a control station and an upper computer; the field intelligent instrument is connected with the storage device, the control station and the upper computer; and the upper computer comprises a self-adaptive nonlinear controller which is used for calculating and outputting control variable values of the internal thermally coupled distillation column and comprises a component deduction module, a self-adaptive model parameter correction module and a self-adaptive nonlinear control law solving module. The invention also provides a self-adaptive nonlinear control method for the internal thermally coupled distillation column. The control system and the method of the invention can well overcome the strong nonlinear characteristics of the internal thermally coupled distillation column, and have high on-line operational speed, and good servo tracking control effect and interference suppression effect.

The invention discloses a dynamo nonlinear control system based on synchronized phasor measurement technology and a method thereof. The control system of the invention comprises an information bus 2; an information output interface of a global positioning system 1 is connected with the information bus 2; a substation PMU 3 and a control centre station 4 are connected with the information bus 2 via a communication interface; a data output end of the substation PMU 3 is connected with a local controller 5. The invention has the control method that the global positioning system 1 transmits a time signal to the information bus 2 via the information output interface; the substation PMU 3 synchronously transmits the information to the information bus 2; the control centre station 4 synchronously treats and stores the time signal of the global positioning system 1 and the signal of the substation PMU 3 from the information bus 2 via the communication interface; then, the treatment result is transmitted to the substation PMU 3 first, and the substation PMU 3 transmits the information to the local controller 5, which better improves the dynamical quality of a power system as well as drastically improves the stability of the power system.

The invention provides an attitude control method for a propeller unmanned drone aircraft based on adaptive control, and the method comprises the steps: 1, determining an unmanned plane linear mathematic model; 2, determining an unmanned plane linear mathematic reference model; 3, employing an adaptive control algorithm to calculate a control law upsilon of an unmanned plane linear control system. The method is used for designing an attitude controller of an unmanned plane, thereby enabling the actual control output of the system to quickly and accurately track the reference adaptive control of models. The method is high in resistance to external interference.

The invention discloses a long-stroke DC linear motor and a control system thereof, which relate to the liner motors and aim to solve the problems of difficulties in the simultaneously achievement of high power and high accuracy because the conventional DC linear motor and the control system thereof only have a set of winding and a drive controller. An even number of flat constant magnetic permanent magnets are arranged on magnetic conductive yoke parts respectively. A control winding is uniformly wound on the outer surface of a middle magnetic conductive yoke. A plurality of sections of power windings are uniformly and closely wound on the outer surface of the control winding. An even number of compensation windings are wound on the magnetic conductive yoke parts respectively. A secondary part adopts a double-side secondary part. A main permanent magnet is a flat permanent magnet. Four elongated auxiliary permanent magnets are arranged on the four sides of the main permanent magnet respectively. A permanent magnet holder is fixedly arranged about the four elongated auxiliary permanent magnets. The long-stroke DC linear motor and the control system thereof have the advantages of achieving high thrust and high accuracy in acceleration and deceleration control, achieving high accuracy in speed and position control, improving current and thrust dynamic response and the like, and are applicable to various DC linear control systems.

The invention relates to an ultra-pure self-adaptive nonlinear control system for an internal thermally coupled distillation column. The system comprises a field intelligent instrument and a distributed control system (DCS) which are directly connected with the internal thermally coupled distillation column, wherein the DCS comprises a storage device, a control station and an upper computer; the field intelligent instrument is connected with the storage device, the control station and the upper computer; and the upper computer comprises an ultra-pure self-adaptive nonlinear controller which is used for calculating and outputting control variable values of the internal thermally coupled distillation column and comprises a component deduction module, a self-adaptive parameter correction module and an ultra-pure self-adaptive nonlinear control law solving module. The invention also provides an ultra-pure self-adaptive nonlinear control method for the internal thermally coupled distillation column. The control system and the method of the invention can well overcome the strong nonlinear characteristics of the ultra-pure internal thermally coupled distillation column, and have high on-line operational speed, and good servo tracking control effect and interference suppression effect.

The invention discloses an aero-engine nonlinear control system modeling method. The method comprises the following steps: setting an initial value of a nonlinear adaptive filter for identifying inputand output of a control system; recording current and historical moment inputs of the control system; performing inner product operation on an input vector obtained on the basis of the input and theweight of the FIR filter; obtaining FIR filtered output, obtaining a local interval index and a local normalized coordinate of the local interval index in the spline interpolator; generating spline interpolator output; output of the control system at the current moment is collected through a sensor. The output of the spline interpolator is compared with the output of the spline interpolator; obtaining filtering errors, respectively calculating the weight of the FIR filter and the gradient of the spline interpolation point at the current moment according to the filtering error; respectively calculating the gradient momentum of the weight of the FIR filter and the gradient momentum of the spline interpolation point according to the gradient, respectively updating the weight vector of the FIRfilter and the coordinates of the spline interpolation point, and continuing to carry out the adaptive process of the next moment from the second step.

The invention discloses a nonlinearly controlled high-precision wave generation system. The nonlinearly controlled high-precision wave generation system comprises a computer control driving system, a mechanical transmission system and a wave generation board which are connected with one another sequentially, wherein the computer control driving system is used for generating a nonlinear control signal and driving the wave generation board to do a nonlinear motion through the mechanical transmission system. By adoption of the nonlinearly controlled system, waves which are more complicated and variable than waves generated by a linearly controlled system can be generated, so the wave generation precision and the wave generation accuracy can be improved. An embedded system, a programmable controller or an industrial control computer is used as a computer control unit according to different application requirements on control precision, response speed and stability; and on the premise of guaranteeing high precision and high response speed, the flexibility and the stability of operation of the system are enhanced, and the maintenance cost is reduced. In a mechanical part, a ball screw nut pair is adopted for driving; by adoption of a more stable transmission structure, the control precision and the stability are enhanced, and the reliability of the whole system during working for long time is guaranteed. The invention also discloses a nonlinearly controlled high-precision wave generation method.

The invention discloses a linear control system of a broadband solid-state power amplifier and a control method thereof, the system comprises a control unit, a preceding-stage power amplifier unit and a last-stage power amplifier unit, and is characterized in that the preceding-stage power amplifier unit and the last-stage power amplifier unit are sequentially connected in series, and the control unit is respectively connected with the preceding-stage power amplifier unit and the last-stage power amplifier unit. According to the invention, combined control of radio frequency input power attenuation control and chip drain electrode voltage regulation is adopted, linear multi-gear control of transmitting power in an ultra-wideband range is realized, and the ultra-wideband linear multi-gear control circuit has the advantages of linearly adjustable ultra-wideband power, automatic and rapid power regulation, high control precision, simple control implementation, low operation cost and the like.

Described is a control command system for generating control commands for a vehicle. The system receives a networked control system corresponding to a network of subsystems of sensors and actuators of the vehicle and data collected from sensors on the vehicle. Multiple subsystems are formed from the networked control system. A dynamic mode decomposition with control (DMDc) process is applied to each subsystem, yielding a linear approximation for each subsystem. The linear approximations are combined into a single linear approximation for the networked control system, and a linear control system approximating the networked control system is output. Control commands are generated for the vehicle based on the linear control system, which cause the vehicle to perform a vehicle operation.