TW484044B - Controlling method of dynamically adjusting the static error of the principal axis motor - Google Patents

Abstract

The present invention is a controlling method of dynamically adjusting the static error of the principal axis motor of optical storage device by using the different control modes in different sections and different values, the static error of the principal axis is compressed to the reasonable value to meet the specification of the CD writer. Meanwhile, there is no oscillation of the principal axis motor system and the recording quality can be maintained.

Description

V. Explanation of the invention (1) State correction of the steady state of the spindle motor The method of suppressing the steady state of the spindle motor in a spiral shape is composed of the internal data track of a continuous circle. The front is relative to the book where the disc is located), which is engraved with the Q degree order from the inside to the outside. The machine only needs to read the Q position on the disc in order to correct the data. It is known that the linear speed of the optical disc burner (Constant track is completed from the inside to the outside. The present invention is a method of controlling optical error + error, ΐ; storage: method of dynamic error of the device. "-A kind of effective 5 CD The data of the optical disc is arranged on the optical disc outwardly, and pn ^ ^ continues the spiral way, instead of the first disc, the optical head is detected by several concentric optical storage drives such as the optical disc. For CD discs, (Refer to the specifications „. The QCodes are placed on the road at a fixed long distance. Therefore, the disc is 1e: you can know that the optical head is indeed transmitted to the post-processing user.

When burning data, it is usually a fixed Linear * Velocity ’or CL for short. y team 1 tears are placed on the disc, there is nothing, and the CD R / CD-RW recorder is before the data is recorded. The disc inside the machine is not saved, and there is no data. U :. Therefore, there will be the following problems: (). The disc player cannot know where the optical head is relative to the disc. (2 The machine cannot be burned at the correct line speed (clv). (3) • The UDF format cannot be supported. (4) • The remaining space on the disc cannot be known. (5) • The disc cannot be known Manufacturer and disc characteristics.

484044 V. Description of the invention (2) (6). Optimized laser power control (〇ptimujn power Control '0PC for short) cannot be performed, which directly affects the burning quality. Therefore, when casting CD-R and CD-RW discs, wobble signals are engraved. This wobble signal is engraved on the air carrier with ρ μ frequency modulation to record the address of each point of the cymbal and other information. The system reads the information in the FM demodulation mode to solve the above problems. Generally speaking, The address of the wobble signal is an absolute reference to the length and fork of the q Code to achieve the purpose of backward compatible CD-ROM. Therefore, when a CD-R / CD-RW recorder burns a disc, it must synchronize the address of the Q Code while referring to the address of the wobble signal, and simultaneously write the q Code on the disc. Based on the specifications developed by the CD-R and CD-Rw systems (according to SONY and Philippine), the wobble signal is demodulated by fm to generate the ATIP (Absolute Time in pre-groove) information. The specifications in this specification are written in the Sub Sync · (start of q Code) and ATIP sync. (Start of ATIP) must not exceed two 8-14 modulation data frames (EMF frame), as shown in the first figure. In order to reduce the error of Sub Sync. And AT IP sync when programming at a fixed linear velocity (CLV), the general position control method is to increase the gain in the low frequency range or add an integrator. However, this method is likely to cause the spindle The resonance of the motor increases the error rate of the Cyclic redundancy check (CRC) for reading the ATIP signal from the disc drive. In addition, the quality of the drive is reduced due to the speed of the motor. "

484044 V. Explanation of the invention is based on the “developed steady state error formula of design state error”, the common purpose of the stable motor and the technology. • However, the control of this error is limited. Please refer to the system frame signal processing. Among them, the initial code controller and the ASIC are reasonably poor, please refer to 1 in the motor (3); the inventor researched and devised a dynamic repair method of the optical disc drive burning device. One of the goals of the Ming Dynasty is to provide a control method that can be used to reduce the error of the division score to a reasonable value, while still maintaining the quality of the burnout. To enable your review committee to further understand the contents, please refer to the following detailed description of the present invention. The drawings are for reference and explanation only, and are not intended for reference. Ming is a dynamic correction method for optical storage devices, which suppresses the steady-state error to a reasonable value based on the difference in partition scores. The second figure is a relationship diagram of the forward control mechanism of the present invention. The spindle motor control system 2 is a preamplifier 2. The electric drive digital signal processing system 2 1 is composed of an initial control equalization circuit 2 and a digital / analog conversion ATIP synchronization detector integrated in an ASIC chip for planning and calculation. Suppress the spindle value. As shown in the third and fourth figures, under the condition that the rotation speed is stable, the present invention detects the different control modes of the main spindle motor that uses the positive spindle motor to stably suppress the spindle horse, which will cause the detailed description and diagram of the characteristics of the present invention. The formula is used for the steady state control mode of the spindle motor of the present invention, and the spindle motor control system is composed of a digital actuator 23 and other equalization circuits. In the ATIP solution chip, the steady state error control of the motor is achieved first. Speed

Page 6 484044 V. Description of the invention (4) The motor speed is multiplied by a gain to calculate the initial value (initial fixed offset value), and the initial value is added to the spindle motor by feed forward compensation 3: 1 in the controller to reduce the steady-state error between AT IP sync. And Sub Sync. Then, read the steady-state error of the spindle motor control system to modify its initial value 3 2. Then, the correction is performed in the control mode of the division score 3 3, and the steady-state error is suppressed to a reasonable value 3 4. In the present invention, the correction is performed in the control mode of the division score, which is to define the stable error into several intervals. 'At first, it operates with two intervals, (1) a high error interval; (2) a medium error interval. ; (3) low error interval. In the high error amount range (there is no upper limit), add and subtract a higher and fixed offset value to the aforementioned initial value, and check the error amount again, so repeat the operation until the error amount Is reduced so that the error amount interval π is entered. If the offset value is repeatedly added and subtracted, and the error oscillates back and forth outside the error amount interval π in π, then the error amount interval π in π is enlarged so that the error amount smoothly enters the error amount interval π in π and the offset at this time is fixed. Value, defined here as OFF 1. A small and fixed offset value is added to and subtracted from the error amount interval π in π, which is OFF 1 as described above, and the error amount is approximated to the low error amount interval π. If the offset value is repeatedly added and subtracted to make the error oscillate back and forth outside the π low error amount interval, then a new "new low error amount interval π" is added. This interval is

Page 7 484044 V. Description of the invention (5) It is between the "medium error amount interval" and π low error amount interval π, so that the error amount enters the "new low error amount interval", and the offset value at this time is fixed. Here it is defined as OFF 2 0 in the new low error amount interval `` Add and subtract a smaller and fixed offset value to the aforementioned OFF 2 to bring the error amount closer to the low error amount interval π, and repeat this operation until the error The amount is reduced so as to enter the "low error amount interval π", and the entire operation process is completed. In this way, the steady-state error of the spindle motor of the optical disc burner can be suppressed to a reasonable value. In summary, through the control method of the present invention, It has the following characteristics: (1). It can effectively suppress the steady-state error of the spindle motor of the optical disc burner to a reasonable value. (2). Does not cause resonance of the spindle motor. (3). Improve the recording quality. Therefore, the patent application of the present invention meets the requirements of the invention. If the application is made in accordance with the Patent Law, please check and grant this case in detail to protect the rights and interests of the inventor. Press The above is only one of the best specific embodiments of the present invention, but the method features of the present invention are not limited to this. Any person skilled in the art can easily think of changes or modifications in the field of the present invention. Both can be covered by the patent scope of this case.

Page 8 484044 Brief description of the diagram The first diagram is the error status diagram of AT IP Sync. And Sub Sync. According to the specifications of the disc burner. The second diagram is a relationship diagram of forward control and system architecture of the present invention. The third diagram is a control flowchart of the present invention. The fourth diagram is a time domain control state diagram of the present invention. Explanation of drawing numbers and names 1 Digital signal processing system 2 Pre-amplifier 3 Electric driver

Claims (1)

484044 6. Scope of patent application 1 · A dynamic score control of an optical storage device includes the following rotation speed (Value), a control method of state error suppression (a) · check in a fixed offset value controller; (b) · read offset (C) · Press U) · Pressure (e) with a constant error. If it is switched, the system is divided to a reasonable value, and the spindle motor (Constant) is used to stabilize the spindle motor. Calculate the initial value according to its speed and add it to the control of the spindle motor to take the steady-state error of the system, determine whether to modify its fixed error 1E into several intervals, define the maximum error interval, and stabilize it with a larger correction value. The state will be within the interval of the smaller next zone. Once the new zone is established, the error will be reduced once it enters the new zone. In order to enter a smaller correction value, it will not be able to enter the next small correction zone. Once it enters the next zone In addition, if the steady state region is set, the tangent error will be re-calculated (f). The correction will be calculated again (g). The minimum error value, at which time the fault continues to check out the range, the minimum error amount is applied for a patent. Fan steady state error depends on the system demand interval. Once the error amount has entered this interval, it does not meet the system requirements; and the error amount If the minimum error area is exceeded, the correction value of the previous area will be used to set the steady-state error interval. The control of the first difference is adjusted using the described optical storage device operation method, wherein the stepwise method of step (c) will stabilize State error Page 10 484044 VI. Application for patent scope 3 · The control method for dynamically correcting the steady-state error of the spindle motor by the optical storage device described in item 1 of the scope of patent application, where step (d) cannot suppress the steady-state error to the next Range, you can use the enlarged range limit to facilitate entering the next range, or add a new range before the next range to facilitate leaving this range. 4 · The method for dynamically correcting the steady state error of the spindle motor of the optical storage device as described in item 1 of the scope of the patent application, wherein the correction value of step (d) can be adjusted according to system requirements, and the correction value is set in the reference interval manner. 5 · The method for dynamically correcting the steady state error of the spindle motor of the optical storage device as described in item 1 of the scope of the patent application, wherein the correction value of step (e) can be adjusted according to the system requirements, and the correction value is set in the reference interval manner. · 6 · According to the control method for dynamically correcting the steady state error of the spindle motor of the optical storage device described in item 1 of the scope of the patent application, the correction value of step (f) can be adjusted according to system requirements, and the correction value is set in the reference interval manner. 7 · The control method for dynamically correcting the steady state error of the spindle motor by the optical storage device described in item 4, 5, or 6 of the scope of the patent application, wherein the correction value of each interval is a fixed value, that is, the interval can only be changed after the interval is changed. Change the correction value. Page 11