# 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)March 31, 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                   |  | (Commission  |  | (IRS Employer       | 
|of incorporation)                              |  | File Number) |  | Identification No.) | 
|                                              
|14000 Technology Drive Eden Prairie, Minnesota |  |              |  | 55344               | 
|(Address of principal executive offices)       |  |              |  | (Zip Code)          | 

Registrants telephone number, including area code (952) 937-4000

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Check the appropriate box below if the Form 8-K filing is intended to
simultaneously satisfy the filing obligation 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.

On March 31, 2006, MTS Systems Corporation issued a news release regarding a
purchase under its share repurchase program. The full text of the news release is furnished as Exhibit 99.1 to this Form 8-K.

# Item 9.01   Financial Statements and Exhibits.

The following is furnished as an Exhibit to this Report.

Exhibit 99.1  News
release issued March 31, 2006, 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 hereunto duly authorized.

|                      | MTS SYSTEMS CORPORATION(Registrant)                      
|--------------------- | ---------------------------------------------------------
|                     
|Date   March 31, 2006 | /s/   SUSAN E. KNIGHT                                    
|                      | Susan 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 |  | Exhibit 99.1  News release issued March 31, 2006, furnished
pursuant to Item 7.01 of this Form 8-K.
|---- |  | ----------------------------------------------------------------------------------------------------

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