關(guān)于MPU6050姿態(tài)解算原理
mpu6050常用作提供飛控運(yùn)行時(shí)的姿態(tài)測(cè)量和計(jì)算,在在姿態(tài)結(jié)算中有幾個(gè)重要的概念,歐拉角、四元數(shù)等。
歐拉角:用來表征三維空間中運(yùn)動(dòng)物體繞著坐標(biāo)軸旋轉(zhuǎn)的情況。即物體的每時(shí)每秒的姿態(tài)可以由歐拉角表出。
四元數(shù):超復(fù)數(shù),q=(q0,q1,q2,q3),q0位實(shí)數(shù),q1,q2,q3為虛部的實(shí)數(shù)。簡單的可以理解為四維空間,就是原有的三維空間加入一個(gè)旋轉(zhuǎn)角。而四元數(shù)可以表征歐拉角,并且計(jì)算方便,故采用四元數(shù)來計(jì)算。在此還要提到加速度和磁力計(jì)補(bǔ)償原理,可以參照http://blog.csdn.net/nemol1990/article/details/21870197?utm_source=tuicool&utm_medium=referral博客中提到的原理與基本概念。在此再啰嗦一下:補(bǔ)償?shù)哪康氖鞘箖蓚€(gè)坐標(biāo)系世界坐標(biāo)系和剛體坐標(biāo)系能夠完全重合,在此基礎(chǔ)上,計(jì)算補(bǔ)償值來修正旋轉(zhuǎn)矩陣,即四元數(shù)矩陣。最終的結(jié)果是解算出四元數(shù)的姿態(tài),就是四元數(shù)矩陣的各個(gè)元素的值。按照上述博客中的程序解算四元數(shù)的時(shí)候,用到了Kp和Ki兩個(gè)參數(shù),兩個(gè)參數(shù)的作用是用來控制矯正剛體坐標(biāo)系速度的。即調(diào)節(jié)加速度和磁力計(jì)補(bǔ)償?shù)乃俣龋ㄕ{(diào)節(jié)誤差的生成速度,進(jìn)而調(diào)節(jié)剛體坐標(biāo)系和世界坐標(biāo)系的重合度)
加速計(jì)補(bǔ)償?shù)睦斫猓?/p>
由于重力加速度的原因,加速計(jì)只能補(bǔ)償X-Y軸的偏差,即經(jīng)過解算后的坐標(biāo)中世界坐標(biāo)XOY和剛體坐標(biāo)XOY能夠重合,但是無法補(bǔ)償航向角。
在此基礎(chǔ)上,利用磁力計(jì)進(jìn)行補(bǔ)償,因?yàn)楫?dāng)?shù)卮艌鍪且粋€(gè)橢圓,所以我們把世界坐標(biāo)系的X-AIXS軸對(duì)準(zhǔn)真實(shí)世界的北方,這樣,磁場園只能在XOZ的平面圓里面,所以磁力計(jì)在世界坐標(biāo)系中的分量是[I,0,k],即在Y軸沒有分量,因?yàn)?0度的夾角余弦為0.但此時(shí)i和k的值并不確定是多少。在剛體坐標(biāo)系中磁力計(jì)的輸出為[a,b,c,],旋轉(zhuǎn)到和世界坐標(biāo)系中,計(jì)算出i和k,然后,在經(jīng)過旋轉(zhuǎn)把其旋轉(zhuǎn)到剛體坐標(biāo)系中,然后計(jì)算誤差修正旋轉(zhuǎn)矩陣,此時(shí)得到精確的旋轉(zhuǎn)矩陣。
mpu6050姿態(tài)解算程序
08.MPU6050\Hardware\ioi2c.c
08.MPU6050\Hardware\ioi2c.h
08.MPU6050\Hardware\mpu6050.c
08.MPU6050\Hardware\mpu6050.h
08.MPU6050\Hardware\nrf24l01.c
08.MPU6050\Hardware\nrf24l01.h
08.MPU6050\Hardware\spi.c
08.MPU6050\Hardware\spi.h
08.MPU6050\Libraries\CMSIS\CMSISENDUSERLICENCEAGREEMENT.pdf
08.MPU6050\Libraries\CMSIS\Device\ST\STM32F4xx\Include\stm32f4xx.h
08.MPU6050\Libraries\CMSIS\Device\ST\STM32F4xx\Include\system_stm32f4xx.h
08.MPU6050\Libraries\CMSIS\Device\ST\STM32F4xx\Source\Templates\arm\startup_stm32f4xx.s
08.MPU6050\Libraries\CMSIS\Device\ST\STM32F4xx\Source\Templates\gcc_ride7\startup_stm32f4xx.s
08.MPU6050\Libraries\CMSIS\Device\ST\STM32F4xx\Source\Templates\iar\startup_stm32f4xx.s
08.MPU6050\Libraries\CMSIS\Device\ST\STM32F4xx\Source\Templates\system_stm32f4xx.c
08.MPU6050\Libraries\CMSIS\Device\ST\STM32F4xx\Source\Templates\TASKING\cstart_thumb2.asm
08.MPU6050\Libraries\CMSIS\Device\ST\STM32F4xx\Source\Templates\TrueSTUDIO\startup_stm32f4xx.s
08.MPU6050\Libraries\CMSIS\Documentation\CMSIS-SVD_Schema_1_0.xsd
08.MPU6050\Libraries\CMSIS\Documentation\CMSIS_Logo_Final.jpg
08.MPU6050\Libraries\CMSIS\Include\arm_common_tables.h
08.MPU6050\Libraries\CMSIS\Include\arm_math.h
08.MPU6050\Libraries\CMSIS\Include\core_cm0.h
08.MPU6050\Libraries\CMSIS\Include\core_cm3.h
08.MPU6050\Libraries\CMSIS\Include\core_cm4.h
08.MPU6050\Libraries\CMSIS\Include\core_cm4_simd.h
08.MPU6050\Libraries\CMSIS\Include\core_cmFunc.h
08.MPU6050\Libraries\CMSIS\Include\core_cmInstr.h
08.MPU6050\Libraries\CMSIS\README.txt
08.MPU6050\Libraries\STM32F4xx_StdPeriph_Driver\inc\misc.h
08.MPU6050\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_adc.h
08.MPU6050\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_can.h
08.MPU6050\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_crc.h
08.MPU6050\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_cryp.h
08.MPU6050\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_dac.h
08.MPU6050\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_dbgmcu.h
08.MPU6050\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_dcmi.h
08.MPU6050\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_dma.h
08.MPU6050\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_exti.h
08.MPU6050\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_flash.h
08.MPU6050\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_fsmc.h
08.MPU6050\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_gpio.h
08.MPU6050\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_hash.h
08.MPU6050\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_i2c.h
08.MPU6050\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_iwdg.h
08.MPU6050\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_pwr.h
08.MPU6050\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_rcc.h
08.MPU6050\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_rng.h
08.MPU6050\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_rtc.h
08.MPU6050\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_sdio.h
08.MPU6050\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_spi.h
08.MPU6050\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_syscfg.h
08.MPU6050\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_tim.h
08.MPU6050\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_usart.h
08.MPU6050\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_wwdg.h
08.MPU6050\Libraries\STM32F4xx_StdPeriph_Driver\src\misc.c
08.MPU6050\Libraries\STM32F4xx_StdPeriph_Driver\src\stm32f4xx_adc.c
08.MPU6050\Libraries\STM32F4xx_StdPeriph_Driver\src\stm32f4xx_can.c
08.MPU6050\Libraries\STM32F4xx_StdPeriph_Driver\src\stm32f4xx_crc.c
08.MPU6050\Libraries\STM32F4xx_StdPeriph_Driver\src\stm32f4xx_cryp.c
08.MPU6050\Libraries\STM32F4xx_StdPeriph_Driver\src\stm32f4xx_cryp_aes.c
08.MPU6050\Libraries\STM32F4xx_StdPeriph_Driver\src\stm32f4xx_cryp_des.c
08.MPU6050\Libraries\STM32F4xx_StdPeriph_Driver\src\stm32f4xx_cryp_tdes.c
08.MPU6050\Libraries\STM32F4xx_StdPeriph_Driver\src\stm32f4xx_dac.c
08.MPU6050\Libraries\STM32F4xx_StdPeriph_Driver\src\stm32f4xx_dbgmcu.c
08.MPU6050\Libraries\STM32F4xx_StdPeriph_Driver\src\stm32f4xx_dcmi.c
08.MPU6050\Libraries\STM32F4xx_StdPeriph_Driver\src\stm32f4xx_dma.c
08.MPU6050\Libraries\STM32F4xx_StdPeriph_Driver\src\stm32f4xx_exti.c
08.MPU6050\Libraries\STM32F4xx_StdPeriph_Driver\src\stm32f4xx_flash.c
08.MPU6050\Libraries\STM32F4xx_StdPeriph_Driver\src\stm32f4xx_fsmc.c
08.MPU6050\Libraries\STM32F4xx_StdPeriph_Driver\src\stm32f4xx_gpio.c
08.MPU6050\Libraries\STM32F4xx_StdPeriph_Driver\src\stm32f4xx_hash.c
08.MPU6050\Libraries\STM32F4xx_StdPeriph_Driver\src\stm32f4xx_hash_md5.c
08.MPU6050\Libraries\STM32F4xx_StdPeriph_Driver\src\stm32f4xx_hash_sha1.c
08.MPU6050\Libraries\STM32F4xx_StdPeriph_Driver\src\stm32f4xx_i2c.c
08.MPU6050\Libraries\STM32F4xx_StdPeriph_Driver\src\stm32f4xx_iwdg.c
08.MPU6050\Libraries\STM32F4xx_StdPeriph_Driver\src\stm32f4xx_pwr.c
08.MPU6050\Libraries\STM32F4xx_StdPeriph_Driver\src\stm32f4xx_rcc.c
08.MPU6050\Libraries\STM32F4xx_StdPeriph_Driver\src\stm32f4xx_rng.c
08.MPU6050\Libraries\STM32F4xx_StdPeriph_Driver\src\stm32f4xx_rtc.c
08.MPU6050\Libraries\STM32F4xx_StdPeriph_Driver\src\stm32f4xx_sdio.c
08.MPU6050\Libraries\STM32F4xx_StdPeriph_Driver\src\stm32f4xx_spi.c
08.MPU6050\Libraries\STM32F4xx_StdPeriph_Driver\src\stm32f4xx_syscfg.c
08.MPU6050\Libraries\STM32F4xx_StdPeriph_Driver\src\stm32f4xx_tim.c
08.MPU6050\Libraries\STM32F4xx_StdPeriph_Driver\src\stm32f4xx_usart.c
08.MPU6050\Libraries\STM32F4xx_StdPeriph_Driver\src\stm32f4xx_wwdg.c
08.MPU6050\Output\Obj\STM32F4-TEST.hex
08.MPU6050\Project\JLinkSettings.ini
08.MPU6050\Project\STM32F4-TEST.uvgui.XiaoWei
08.MPU6050\Project\STM32F4-TEST.uvopt
08.MPU6050\Project\STM32F4-TEST.uvproj
08.MPU6050\System\delay.c
08.MPU6050\System\delay.h
08.MPU6050\System\led.c
08.MPU6050\System\led.h
08.MPU6050\System\sys.c
08.MPU6050\System\sys.h
08.MPU6050\System\timer2.c
08.MPU6050\System\timer2.h
08.MPU6050\System\uart.c
08.MPU6050\System\uart.h
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