초록 ▼

Disclosed is a method for aligning a position sensor in a vehicle with steerable wheels comprising obtaining an absolute position value responsive to a position signal from a handwheel position sensor, obtaining a relative position value responsive to an encoder signal count from a position encoder,

Disclosed is a method for aligning a position sensor in a vehicle with steerable wheels comprising obtaining an absolute position value responsive to a position signal from a handwheel position sensor, obtaining a relative position value responsive to an encoder signal count from a position encoder, and obtaining an index position value responsive to an index position signal. The method further includes receiving an alignment enable signal and determining a correction factor responsive to the relative position value and the index position value. The method for aligning a position sensor is responsive to at least one of the absolute position value, the relative position value, and the index position value under conditions determined from the status of the alignment enable signal. Also disclosed is a method for aligning a steerable wheel in a vehicle with electric power steering comprising obtaining an alignment correction corresponding to a computed correction of wheel position relative to the vehicle from an alignment apparatus, receiving an alignment enable signal, where the method of aligning is responsive to the alignment correction under conditions determined from the status of the alignment enable signal.

대표청구항 ▼

Disclosed is a method for aligning a position sensor in a vehicle with steerable wheels comprising obtaining an absolute position value responsive to a position signal from a handwheel position sensor, obtaining a relative position value responsive to an encoder signal count from a position encoder,

Disclosed is a method for aligning a position sensor in a vehicle with steerable wheels comprising obtaining an absolute position value responsive to a position signal from a handwheel position sensor, obtaining a relative position value responsive to an encoder signal count from a position encoder, and obtaining an index position value responsive to an index position signal. The method further includes receiving an alignment enable signal and determining a correction factor responsive to the relative position value and the index position value. The method for aligning a position sensor is responsive to at least one of the absolute position value, the relative position value, and the index position value under conditions determined from the status of the alignment enable signal. Also disclosed is a method for aligning a steerable wheel in a vehicle with electric power steering comprising obtaining an alignment correction corresponding to a computed correction of wheel position relative to the vehicle from an alignment apparatus, receiving an alignment enable signal, where the method of aligning is responsive to the alignment correction under conditions determined from the status of the alignment enable signal. data and said liquid level data into a supplementary quantity data by a table memorized in said program logic controller means to transport said second feed into said mixing means. 3. The method according to claim 2, wherein said concentration data which is received by said program logic controller (PLC) means is transmitted to program logic controller (PLC) means from said concentration detector. 4. The method according to claim 2, wherein said liquid level data which is received by said program logic controller (PLC) means is transmitted to program logic controller (PLC) means from said mixing means. 5. The method according to claim 3, wherein said supplementary quantity data of said second fluid is transmitted to said valve from said program logic controller (PLC) means. 6. A closed loop concentration control system for a polishing slurry of chemical mechanical polishing process, the control system comprising: first mixing means for mixing a first feed, wherein said first feed flows into said first mixing means to form a first mixed fluid, and said first feed comprises an oxidant; second mixing means for mixing a second feed and said first mixed fluid to form a second mixed fluid, herein said first mixed fluid flows toward said second mixing means from said first mixing means, and said second mixed fluid flows toward said first mixing means from said second mixing means; closed loop concentration control means for determining a first concentration of said oxidant in said second mixed fluid, said closed loop concentration control means monitors a second feed flowing into said second mixing means by said first concentration of said second mixed fluid so as to compensate the concentration of said oxidant, herein said second mixed fluid flows toward said closed loop concentration control means from said second mixing means, and then said mixed fluid flows into said second mixing means; and transported means for transporting said second feed into said second mixing means to mix with said mixed fluid so as to form said second mixed fluid having a second concentration. 7. The system according to claim 6, wherein said closed loop concentration control system comprises: a concentration detector having an output end and an input end, which is used to measure said concentration of said oxidant in said second mixed fluid, herein said second mixed fluid flows toward said input end of said concentration detector from said second mixing means; a piping controller, which connects with said output end of said concentration detector, herein said piping controller is used to control said second mixed fluid to leave said closed loop concentration control means and flow into said second mixing means; a valve having an output end and an input end, which is used to control flow of said second feed, herein said second feed flows toward said mixing means from said output end of said valve; and a program logic controller (PLC) means for receiving a concentration data, receiving a liquid level data, said program logic controller means converts said concentration data and said liquid level data into a supplementary quantity data by a table memorized in said program logic controller means to transport said second feed into said second mixing means. 8. The method according to claim 7, wherein said concentration data which is received by said program logic controller (PLC) means is transmitted to program logic controller (PLC) eans from said concentration detector. 9. The method according to claim 5, wherein said liquid level data which is received by said program logic controller (PLC) means is transmitted to program logic controller (PLC) means from said second mixing apparatus. 10. The method according to claim 7, wherein said supplementary quantity data of said second fluid is transmitted to said valve from said program logic controller (PLC) means. 11. The method according to claim 7, wherein said program logic controller (PLC) mea ns controls said valve to transport said supplementary quantity of said second fluid into said second mixing means from said closed loop concentration control means. 12. A closed loop concentration control system for a polishing slurry for a chemical mechanical polishing process, the control system comprising: a tank, said tank mixes a first feed to from a mixed fluid, wherein said first feed comprises an oxidant having a first concentration, and said oxidant decays to form said second concentration; a closed loop concentration control apparatus, said closed loop concentration control apparatus determines said second concentration of said oxidant of said mixed fluid transported into said closed loop concentration control apparatus from said tank, and said closed loop concentration control apparatus calculates the requirement of said first concentration, wherein said mixed fluid flows toward said closed loop concentration control apparatus, and then said mixed fluid flows into said tank; and a transported apparatus monitored by said closed loop concentration control apparatus, said transported apparatus transport a second feed having said oxidant into said tank in accordance with the requirement of said first concentration to mix with said mixed fluid so as to compensate the decayed concentration of said oxidant. 13. The system according to claim 12, wherein said first feed further comprises a polishing slurry and deionized water. 14. The system according to claim 13, wherein said oxidant comprises a hydrogen peroxide solution. 15. The system according to claim 12, wherein said closed loop concentration control means comprises: a concentration detector having an output end and an input end, which is used to measure said second concentration of said oxidant to form a concentration data, herein said mixed fluid flows toward said input end of said concentration detector from said tank; a piping controller, which connects with said output end of said concentration detector, herein said piping controller is used to control said mixed fluid to leave said closed loop concentration control apparatus and flow into said tank; a valve having an output end and an input end, which is used to control flow of said second feed, herein said second feed flows toward said tank from said output end of said valve; and a program logic controller (PLC) means for receiving said concentration data from said concentration detector, receiving a liquid level data from said tank, calculating a supplementary quantity data of said second feed by a table for converting said concentration data and said liquid level data into said supplementary quantity data, wherein said program logic controller means controls said valve by said supplementary quantity data to transport said second feed from said transported apparatus into said tank. 16. A closed loop concentration control system for a polishing slurry for a chemical mechanical polishing process, the control system comprising: a first tank, said first tank mixes a first feed to form a mixed fluid, wherein said first feed has a polishing slurry, dinoize water and an oxidant having said first concentration, said first concentration decays to form a second concentration; a second tank, said mixed fluid is transported into said second tank from said first tank, and said second tank determines a liquid level data of said mixed fluid; a closed loop concentration control apparatus, said closed loop concentration control apparatus determines said second concentration of said oxidant of said mixed fluid transported into said closed loop concentration control apparatus from said second tank, and said closed loop concentration control apparatus calculates the requirement of said first concentration, wherein said mixed fluid flows toward said closed loop concentration control apparatus, and then said mixed fluid flows into said second tank; and a transported apparatus monitored by said closed loop conc entration control apparatus, said transported apparatus transports a second feed into said second tank in accordance with the requirement of said first concentration to mix with said mixed fluid so as to compensate the decayed concentration of said oxidant, wherein said second feed has said oxidant, and said mixed fluid is transported into said first tank. 17. The system according to claim 16, wherein said oxidant comprises a hydrogen peroxide solution. 18. The system according to claim 16, wherein said closed loop concentration control means comprises: a concentration detector having an output end and an input end, which is used to measure said second concentration of said oxidant of said mixed fluid to form a concentration data, herein said mixed fluid flows toward said input end of said concentration detector from said second tank; a piping controller, which connects with said output end of said concentration detector, herein said piping controller is used to control said mixed fluid to leave said closed loop concentration control apparatus and flow into said second tank; a valve having an output end and an input end, which is used to control flow of said second feed, herein said second feed flows toward said second tank from said output end of said valve; and a program logic controller means for receiving said concentration data from said concentration detector, receiving said liquid level data from said tank, calculating a supplementary quantity data of said second feed by a table for converting said concentration data and said liquid level data into said supplementary quantity data, wherein said program logic controller means controls said valve by said supplementary quantity data to transport said second feed from said transported apparatus into said second tank. or comprises a left correction factor and a right correction factor. 8. The computer data signal of claim 4 wherein said correction factor further comprises a difference in said relative position value for said left index signal transition and said center position, and a difference in said relative position value for said right index signal transition and said center position. 9. The computer data signal of claim 8 wherein said aligning comprises correcting said absolute position value to a correction factor at the instance of transition of said index position signal and utilizing said encoder signal count to ascertain displacement relative to a known position. 10. The computer data signal of claim 9 wherein said correction factor comprises a left correction factor and a right correction factor. 11. The method of claim 1 wherein said correction factor further comprises a difference in said relative position value for said left index signal transition and a center position, and a difference in said relative position value for said right index signal transition and said center position. 12. A method for aligning a steerable wheel in a vehicle with electric power steering comprising; obtaining an alignment correction corresponding to a computed correction of wheel position relative to said vehicle from an alignment apparatus; receiving an alignment enable signal; and wherein said aligning is responsive to said alignment correction tinder conditions determined from a status of said alignment enable signal. 13. The method of claim 12 wherein said alignment correction comprises left wheel angle corrections. 14. The method of claim 12 wherein said alignment correction comprises right wheel angle corrections. 15. The method of claim 12 wherein said alignment correction comprises a left wheel angle correction and a right wheel angle correction. 16. The method of claim 12 wherein said alignment correction comprises rear wheel angle corrections. 17. The method of claim 12 wherein said aligning includes a compensating process to formulate an adjusted correction command. 18. The method of claim 17 wherein said compensating process comprises a lockup table responsive to a magnitude of said alignment correction. 19. The method of claim 17 wherein said aligning includes combining said adjusted correction command with a desired wheel angle to formulaic a composite wheel angle command for commanding a motor. 20. The method of claim 19 wherein said composite wheel angle command drives a motor in a to reduce said alignment correction and thereby said composite wheel angle command. 21. The method of claim 20 wherein said aligning generates and saves an offset for combination with subsequent wheel angle position measurements. 22. The method of claim 21 wherein said alignment correction comprises left wheel angle corrections. 23. The method of claim 22 wherein said alignment correction comprises a left wheel angle correction and a right wheel angle correction. 24. The method of claim 23 wherein said alignment correction comprises rear wheel angle corrections. 25. The method of claim 21 wherein said alignment correction comprises right wheel angle corrections. 26. The computer data signal of claim 20 wherein said aligning generates and saves an offset for combination with subsequent wheel angle position measurements. 27. The computer data signal of claim 26 wherein said alignment correction comprises left wheel angle corrections. 28. The computer data signal of claim 27 wherein said alignment correction comprises a left wheel angle correction and a right wheel angle correction. 29. The computer data signal of claim 28 wherein said alignment correction comprises rear wheel angle corrections. 30. The computer data signal of claim 26 wherein said alignment correction comprises right wheel angle corrections. 31. The method of claim 12 wherein said aligning includes combining said adjusted correction command with a desired wheel angle to formulate