# UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549

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# Form 8-K

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# CURRENT REPORT

# PURSUANT TO SECTION 13 OR 15(d) OF THE
SECURITIES EXCHANGE ACT OF 1934

DATE OF REPORT (DATE OF EARLIEST EVENT REPORTED):
December 21, 2006

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MTS SYSTEMS CORPORATION
(EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)

|MINNESOTA                                                      |  | 0-2382                   |  | 41-0908057                          
|-------------------------------------------------------------- |  | ------------------------ |  | ------------------------------------
|(STATE OR OTHER JURISDICTION OF INCORPORATION)                 |  | (COMMISSION FILE NUMBER) |  | (I.R.S. EMPLOYER IDENTIFICATION NO.)
|                                                               |  |                          |  |                                     
|14000 TECHNOLOGY DRIVE, EDEN PRAIRIE, MN 55344                
|(ADDRESS OF PRINCIPAL EXECUTIVE OFFICES)   (ZIP CODE)         
|                                                               |  |                          |  |                                     
|(952) 937-4000                                                
|(REGISTRANTS TELEPHONE NUMBER, INCLUDING AREA CODE)          
|                                                              
|N/A                                                           
|(FORMER NAME OR FORMER ADDRESS, IF CHANGED SINCE LAST REPORT.)

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Check the appropriate box below if the Form 8-K is intended to
simultaneously satisfy the filing obligations of the registrant under any of the following provisions:

|o |  | Written communications pursuant to Rule 425 under the
Securities Act (17 CFR 230.425)
|- |  | -------------------------------------------------------------------------------------

|o |  | Soliciting material pursuant to Rule 14a-12 under the
Exchange Act (17 CFR 240.14a-12)
|- |  | --------------------------------------------------------------------------------------

|o |  | Pre-commencement communications pursuant to
Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
|- |  | ------------------------------------------------------------------------------------------------------

|o |  | Pre-commencement communications pursuant to
Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))
|- |  | ------------------------------------------------------------------------------------------------------





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Item 7.01.    Regulation FD
Disclosure



The MTS Systems Corporation (the
Company) 2006 Annual Report to Shareowners sent to shareowners on or about December 21, 2006 (excluding the
Companys 2006 Annual Report on Form 10-K which is enclosed with the Annual Report to Shareowners and was separately filed
with the Commission on December 11, 2006) is furnished as Exhibit 99.1 to this Form 8-K and incorporated herein by reference.



Item 9.01.    Financial
Statements and Exhibits



(c)   Exhibits



Exhibit 99.1  The
Companys 2006 Annual Report to Shareowners (excluding the Companys 2006 Annual Report on Form 10-K) furnished pursuant
to Item 7.01 of this Form 8-K.



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SIGNATURES



Pursuant to the requirements of the Securities
Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly
authorized.



MTS SYSTEMS CORPORATION(Registrant)Date: December 21, 2006
        By:
        /s/   Susan E. KnightSusan E. KnightVice President and Chief Financial Officer






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MTS SYSTEMS CORPORATION

FORM 8-K REPORT



INDEX TO EXHIBITS



|Exhibit No. |  | Description                                                                                                                                                
|----------- |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------
|           
|99.1        |  | The Companys 2006
Annual Report to Shareowners (excluding the Companys 2006 Annual Report on Form 10-K) furnished pursuant to
Item 7.01 of this Form 8-K.





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